#360 Chatfield

This morning I woke at 4:30

but couldn't drag my butt out of bed.

Maybe not a first but certainly unusual. I tried to blame it on the weather but no matter how windblown the clouds looked it was calm at the surface and judging from the dirty air over Denver the inversion probably covered the first 1500 feet AGL.
SOME OPPORTUNITIES ARE LOST...MOVE ON
I made up for it with a nice one this afternoon. There were lots of clouds mid day that built and diminished by 5:00pm. I was concerned about the virga dropping all over the place but once again I didn't notice any "puffs" and figured that the virga was too high to be affecting the surface.
After watching and pacing for 45 minutes at the house I said to myself ....What the heck go to the field and if you don't fly ...it won't be the first time. I arrived at 6:00pm, the winds were very light from the SW. The air was warm. It turned to the WNW while I set up and dropped to 1 knot or less.
My take off must have looked pretty bad but I was grinning from ear to ear. It fell to the left and overshot...started to frontal...fell to the right...came back up and when I finally felt good about it...I added some throttle and did a proper run-out. The new Throttle set-up is much better. The Brake toggle is held in the 3rd and 4th finger leaving my index finger and pinkie to work the throttle. I'm sure the control issues will go away as I get used to the low hangpoint.
As bad as it looked I never felt as if it were not recoverable. GO THUMPER!
The air was good 2 or 3 on the bump scale. I didn't travel too far and mostly carved smaller and smaller turns over the patch. One thing that has been bothering me is the left beaner is one inch longer than the right. I was able to equalize them later and I'm glad I was able to take the time to examine it while in flight. The loops in the new footsteering got in the way but I'm not ready to change it until I've flown it some more.
When I started to notice the bumps were getting bigger I turned back to the truck and landed. It was a nice landing, I came in from the North and managed to stay just above the surface for 200 feet even though the grade was ascending. When I set down it was where I wanted to be, maybe a bit close because I almost took out the windsock with the wing. As I was packing up the breeze dropped 10 degrees and picked up. It felt good...It was a no muss ...no fuss flight...just a nice taste of the sky before the cold front blows in. Tomorrow it's forecast to be 23knots at 3:00pm. Think I'll go sailing.

#352 & #353 Chatfield ...Power on Landings

God made Days off for days like today!

The season is changing and it's happening all too fast. Now days, when I get to the field at 6:00am, it's O'Dark Thirty. Plenty of time to finish that Rock Star and let the caffeine get into the blood stream. It had been partly clouding all night and this morning was hazy and 55 degrees
The wind was SSW variable 4 to 7 which meant I had a slight uphill grade and rotor from the "Club House". The wing came up fast and the buggy had stopped rolling after the first two feet, I was able to add a little "foot power", but the wing stalled and fell to the left, by now, I was starting to roll, so I added right brake and watched the wing swing to the right until the tip was about 6 feet above the ground. Now some left brake and this time it centered and was rock solid over head. Small wing Heavy trike... The Eden III is easy to muscle around because it's smaller, lighter material and more responsive than the Power Play. I don't think this would have tipped the Trike Buggy Basic but I'm sure that I would have felt the trike start to lift on one side. Because of the extended wheelbase and low and heavy CG, the Thumper is incredibly forgiving. When the wing was about 40 percent loaded the "side pull "was just discernible.

When the wing is oscillating like that it's a good time to be looking up at the glider. :) The mirror is great for some pilots, but it tends to take up too much of my attention and I lose the big picture. The climb out was slow, which was made worse because the surface was sloping upward. Once up, it was mostly smooth air. The winds were flowing in a circle, clockwise around the area. I could fly downwind along the western edge of the park and still be downwind on the east side of the park coming home. The neat thing was that the area around the Balloon Port was calm, because it is inside the circle. I watched two balloons go up and hang right over the Port, they didn't move 20 feet except vertically the whole time they were in the air.

I took some shots of the Marina, landed power on and practiced the low and slow. Then took a brake and did it again. The overcast had damped any thermal activity...I could have flown for two more hours it was that good!

Chad...Please bring some different length hang straps and help me dial in these wings for the Thumper Bullet.
1. Measure the current straps and Riser position in relationship to the hang point rings

Don't buy a CT 4 stroke !

This year at the Salton Sea Fly-in I traded in my beautiful little FB Simonini Trike Buggy Classic for a hybrid CT Thumper Briggs & Stratton 4 Stroke on a Trike Buggy Deluxe. I've done some bone headed things before but this one is the worst.

I should have known this wasn't going to work that first day on the Salton Sea. On the maiden flight I parablended my favorite cap right there in front of everybody. The 4 stroke was so quiet I didn't think to put on my helmet and ear protection. Imagine....A machine so quiet you don't notice your not wearing ear protection... until your cap goes through the prop. That's a dangerous machine! Yea, I did go to idle the other day to use the cell phone... but so what?

Every day I find another flaw in this crappy machine. I used to love driving out to Centennial Airport for AV Gas. They let me drive onto the tarmac with the GA guys so I could fill my two 5 gallon gas jugs. I'd drive to the back of the line and wait my turn. Sometimes it took awhile to fill those big birds and when I got done reading the latest issue of Ultraflight I'd get allot of good thinking done sitting in the truck. Now, I don't even need the jugs, I just stop at the gas station on the way to the field and fill the buggy right there in the truck. Where is the romance in that? And that reminds me of another thing. What am I going to do with those cases of TTS in my garage?
And speaking of the garage....my "Man Cave"... I haven't had a good night working on the machine in months. Yeah sure, I can re-rig the footsteering or mount a strobe but mostly I just sit there and gaze at the machine. No changing tension springs on the exhaust or rebuilding the carb. Heck, I'm having a hard time finding a place that needs a little safety wire. It just isn't the same I come in after 3 hours in the garage and I don't even need to wash my hands. It just sucks!
And the flying is different too. Gone is that element of uncertainty, I sit down, buckle the seat belt and turn the key. There is no sense of accomplishment in that. No fooling with the carb or pulling on the starter till I'm bathed in sweat. The other day I flew 15 miles from the LZ and didn't think once about what a drag it would be if I had to land out. Sure, I still keep an eye out for emergency landing sites but it's really just an exercise anymore. I can still remember the thrill of an engine out, what a rush!

So take my advice, if you love the lifestyle, don't by a 4 stroke.

# 280 Simms

Beautiful Morning...

65 degrees at 5:30 with light westerly breeze.

I didn't plan on it but I woke early and it looked good so I went for it.
The launch was better because I found a nice smooth area on the North East end of the field. It makes all the difference when I can get a little momentum built up. The wing had a hard time getting fully inflated perhaps I was a little cross to the wind or it was different 20 feet above the buggy but eventually the right wingtip snapped out and all was good.
I'm going to talk to Terry today and discuss the hard left turns and general sluggishness of the PP Sting. I think there may be some torque issues and I'll ask what kind of tests I can do to figure out whats going on.
The new leash isn't secure enough to hold the throttle by the cruise knob so I'll swap it for a beaner or clip of some kind.

#276 & #277 Flying Simms and Boating Chatfield

Dawn Flight

I awoke at 3:50 this morning when the cell phone's low battery tone woke my bride. After 40 minutes of trying to go back to sleep I slipped into the closet and pulled on the thermals. It reminded me of the first couple of years when I routinely was out of the house before dawn. At 5:00am it was just beginning to get light and there was a fresh breeze from the SW. I took my time looking for the smoothest place to launch and was ready to go at 5:30. The wind was light and I launched after the longest run out ever. It was a little dicey because the climb was very slow and I ended up threading the needle between the trees on the south side of the field. The air was mixing and in some spots down right ratty. I climbed to 6000 and it was no better descending to 200 ft AGL it got very active with the wing yawing and generally making the front wheel describe circles. I set it down just as Marek was pulling into the LZ. I would have done a touch and go but this darn motor is so slow to respond and it felt like sinking air so i satisfied myself by greasing in by the truck


We chatted and I was glad to hear that his Chrysler Dealership was not on the hit list of thirteen to lose their franchise in Colorado. After 20 minutes or so it seemed to be mellowing and I set up for a second shot. Marek saved me the hassle of laying the ramps under the tires and the take off was much better. It was still a long run out but the climb was better. I stayed up 45 minutes and ventured away from the field because the air was much better. This was the first time I have hooked up the foot steering and it is absolutely easier than with the rig I had on the Simonini. I'm going to have to practice maneuvers because I cannot tell it I'm not using enough input or this wing is just plain doggy. I do notice that it seems to be a little more cranky when I'm turning to the left.


I love the way this machine is so problem free but I'm not sure I'm going to be able to adjust to the slow run up to power and general lack of punch.



The last several flights I've noticed that the motor is running between 3500 and 3600 but not coming up to 3700. At the house and before take off it had no trouble getting up there so I'm thinking it's time to put in the high altitude jets to see if I boost the power. It might also help with gas consumption.

After packing up I rushed out to Chatfield where Spencer and I put in the Paradiso. The impeller seems to have frozen. Stay tuned for the damages.

273 Simms

There was cloud activity all day

65 to 70 degrees

Simms & Hampden

Big puffy cumulus over the plains and wind blown cumulus in the foothills. I got to the field right at 7:00pm and sunset was at 8:00. It was blowing 12 mph from the south west swinging all the way over to north west and back. Marek and I kited for a bit and Tracy even took a hand at kiting the sting. At 7:20 the sun set behind the foothills and we knew there was going to be a short window of good air. As I was getting the helium tank out some cool air flowed in without a breath of wind...I popped a black balloon and sure enough it was smooth and dead calm up at least 300 feet.

Marek got up first and with a little manual assist from Tracy to get the buggy rolling on the super soft soil I followed. The wind had started to pick up from the west a so I was forced to take off toward the wires and turn as soon as possible. The run out was a bit long and I noticed some bad friction on the right side but it didn't prevent a clean right hand turn over Hwy 285. I followed around till I was heading toward the high school and took a minute to get some altitude and take the twist out of the right brake pulley. The air was nice and smooth at first but as I got to 6000 feet there were the beginnings of not bumpy but mixing air.

The Thumper was spinning at 3650 and I noticed that there is a little lurch when I goose it from idle. Probably getting a little belt slap as well. It sure sounded sweet when I backed off the throttle and...at idle I could not hear anything at all. For some reason I chose not to use the Emoitic plugs and IPOD and enjoyed the comfort of standard foam plugs. I've been missing allot by filling my head with music. It pays to be able to hear the motor and it would be great to flip back the ear cups when I'm descending or maybe even at level flight!

Over the High School I did some slow turns and worked on slight changes in the throttle. It would be nice if I could find a simple way to increase the throttle travel but I'm finally getting used to it. It helps to use the two little fingers on the throttle and the bigger two on the brake.

After climbing to 6200 I did slow descending spirals over Soccer field and and made an approach toward the truck. The air had "turned" down low...there were areas of sink and lift making it difficult to make a long low approach so I did a fly by at 40 feet and went around again. Turning clockwise at full power I was really disappointed with the climb but it was as much sinking air as lack of power. Hopefully a new set of blades that are two inches longer will be enough improvement to make me happy. Maybe I'll even be able to get a little bank on a full power turn.
The second approach was smoother and I set down right by the truck. Tracy hung around while we packed up and promised to e-mail some photos if he got anything good. Short but sweet....Just what I needed to kill the funk after spending the last 4 hour stretch alone at the store.

Flight 272 Simms

70 degrees and sunny

winds 10-12 at 6:00

decreasing to 4-5 at 6}45

Smooth air / some puffs

Marek pulled up just as I finished driving the truck out of a mud bog.

In trying to avoid a muddy and rutted gully I drove right into it's feeder and packed up the tires big time.

My first thought was to use the ramps to give the back wheels some traction but without a shovel to get them placed under the tire it was easier to work the transmission and power my way to the dry ground. The wind was northeast and strong enough to create a rotor from the water tank North of the high school.

Marek and I kited for 15 minutes while the strong winds that had been blowing all afternoon finally died down. We chatted with an ex skydiver during set up and Marek was the first off at 6:45...I followed by a couple of minutes climbing to 1000 AGL. Marek stayed low and did some touch and goes.

While he was playing in the dirt I finally took the time to let out the trimmers on Monte's PowerPlay 250. There is more travel in the trim tabs and while I was fussing with them I discovered that it's possible to get a twist to run through the buckle. Not a good thing...I could see the possibility of it jamming if I wasn't careful. Without the GPS I can't say how much faster the sting flew but the brakes felt better...less spongy but still not as firm as the Eden III.

I was able to modulate the throttle better than last time but I didn't feel like messing with the cruise control . It was enough to do gentle maneuvers and get to know the wing. Inconsistent is the best word I can come up with to describe the turns. Sometimes there is a noticeable delay before the wing starts to turn. It sure doesn't want to bank I wish that I had 62 inch blades because I could use some more power from the B&S 4stroke .

One thing to work on is the throttle. The way the risers are set my hands are even with the bullet bars and the kill switch is getting bumped. Tomorrow I'll fit a piece of plastic hose to act as a guard.

Marek gave me a great helmet....Thanks buddy!

Flight 271 Simms

First flight in a long time

The wind was coming from the South and East at 5:00 pm.

It was a warm 65 degrees

For 45 minutes it shifted back and forth at 8 knots and for a brief time it swung around to the West. Marek stopped by on his motorcycle and while we chatted the winds came down...He left and I set up. First attempt in light breeze the wing over flew me and I had to re-set. Second was better when I damped the surge a little quicker. I must have got off a bit early because the buggy drifted down a bit. I was a little disappointed by the climb rate it hung at 140 ft/min for awhile but there were areas of lift where I was climbing at 260 and better.

The new FB Throttle is better but I still don't have a good hold yet. I think it might help if I lowered the brakes a little bit. I was not comfortable in the mixing air and had to force myself to go "hands free". I'm still working on fine motor control, the short throw in the throttle and quiet motor make it a real challenge to find the sweet spot.

I'm also a little disappointed by the Power Play Sting 250. It feels mushy compared to the Eden III. Maybe it will firm up with the trimmers out. The wing wanted to turn to the left and after fooling with the trimmers a bit I got it figured out. But I just felt like the wing was doing it's own thing. There was a bit of weed high on the left side and perhaps the drag from it was what I was feeling.

Landing was good.... power on...

Next time try a moving the foot steering so that the arms can go farther back. Use the cruse control and go trimmers out.

Pros and Cons of the Thumper

The Rocky Mountain Thumper

is a very different kind of Paramotor

Two months ago I traded in the beloved Simonini and became the proud owner of a Briggs and Stratton Trike buggy. The 4 stroke power plant was designed and built by Terry Lutke and the Flexfoil Trike was developed for PPG by Chad Bastion.

The biggest downside to going 4 stroke is the lack of fun things to do while not flying. Having spent the last 4 years immersed in this sport, I was comfortable with all the the wonderful little things that are a normal part of a PPG pilots life. The nights spent in the garage replacing compression springs or driving to the airport after dinner to pick up AV Gas. If I wasn't searching the Internet for the best buy on Castrol TTS, I was waiting for the UPS man to deliver a 160 dollar starter sprocket. It seemed like I was either working on the maching or flying it.
For every minute in the air there was an equal or greater amount of time occupied with the care and feeding of my 2 stroke paramotor. If it was blowing…no problem, I have a pull starter to rebuild.

Reliable

These days... things are different, because the heart of the "Thumper" is a Briggs & Stratton, twin V, 4 stroke motor. Thousands of these motors are built every year and the economy of scale makes it possible to produce a very affordable motor with excellent manufacturing tolerances and a beautiful fit and finish. They are designed to run 10,000 hours at peak horsepower, so it's not unreasonable to expect to fly hundreds of hours with nothing more than an annual check-up and oil change. When necessary, parts and expert service are readily available at the local lawnmower repair. Gone are countless hours tinkering with the machine. No mixing fuel, exotic tools or translating owners manuals. Now ,when it's too windy to fly, the best I can do is wish for better air. You still have to be ready for a "motor out" and have an emergency landing site within the glide slope but the reliability of this motor instills a confidence that allows for flights that would not have attempted before.

Quiet

But.... When it is flyable, the thumper is always ready to go and the first thing you notice is the happy rumble of the Briggs & Stratton. On my first flight it was so quiet that I completely forgot the step where I put in the ear plugs and put on the helmet. I realized my mistake just as I was taking off and few seconds later so did everyone at the Salton Sea when my ball cap went through the prop. .....WAAK....ear protection is still necessary but with a four stroke power plant, noise is reduced by thirty percent or more. At cruise with the RPM's reduced it would not be impossible to use a cell phone.

Smooth

The next thing you notice is that the thumper doesn't suffer from the constant vibration that plagues two stroke motors. Its eerie, when the prop is in balance and the motor is running for level flight, its possible to forget all about the power plant and enjoy the ride. Occasionally you will find a node on the power band that sets up a harmonic vibration, but it's easy to bump up or down the RPMs to stay in the sweet spot. Flying a two stroke I was often ready to land at 45 minutes or an hour. Without the vibration I'm much more relaxed and feel like I'll be able to fly as long as the gas and weather will permit. Cross country flights of 100 miles or more are certainly possible.

Not for the con...Only one so far...There isn't the instant power you get with the Simonini. I won't be able to fly the contour of the surface like I used to. This year when I fly the dunes it will be from 30 feet above the tops instead of down in between the dunes. Flying the Thumper is going to require anticipating my power needs. It might be better with a different wing and it's going to be fun to try them out.

Flight 269 Good Air at last Simms

Good flight....Trimmers-in launch.

55 degrees

Light wind from the NW

High overcast

(no gps track)

I'm getting used to the long take off but I was a little surprised by the way I floated at 10 feet for a while before it finally started to climb. I've been letting the buggy build enough speed to take off without brakes but it might be a good idea to ad some brake and see if it improves the climb.

So...I ventured away from the home field and went over to Bear Creek Park for a look see. I should have tested the foot steering but I think I'll wait until I get some kind of cruise control to free up my hands. Same for the trimmers...next time I get into some decent air the trimmers are going out!

The biggest thing to get used to is the slow run up the power band or maybe it's just flying with less power. Touch and goes are tricky because you have to be powering up for the climb-out before you touch down. Another thing is I don't have the power to do any hard banking turns, it might be better with the trimmers out...I'll have to wait for the next flight.

Next time the wind is coming out of the east I'm going to try the Eden III 28m...if it climbs slow at least I'll have plenty of room to work with.

Chad's High Altitude Test Flight

Way to go Chad

12,000 MSL

While I was getting my ass kicked at Vance Brand Chad was setting a new record for the 4 stroke Trike Buggy

Here is his report...

Re: 12000' 4stroker climb out
Posted by: "trikebuggydelta" http://us.mc01g.mail.yahoo.com/mc/compose?to=chad@TrikeBuggy.com&Subject=trikebuggydelta
Mon Mar 2, 2009 10:01 am (PST)
Thumper High Altitude TestsI went out to El Mirage and the Flying "J" Ranch this last weekend tofly the Thumper. I wanted to launch and land the machine, maybe ahundred times, and really get a feel for it. I wanted to do some highaltitude tests, to see how high it would go and what the climb rateswould be at different altitudes. I got there Friday afternoon, and pulled the Thumper out of my shedand gave the key a try. BrBrBRrBrBr, it sounded like a jackhammer as Irealized that I should have removed the positive battery lead before Ileft last time. I pulled my Toyota over near the Thumper and gave herthe breath of life. I let the Thumper run for close to an hour,letting her charge the battery up so I had a bit of reserve. The greatthing about the Briggs & Stratton motor is that this thing just runs!You simply start it, and it just loves to run. I changed the throttlea few times to 2000 and 3000 RPM, and sometimes I would run it rightup to full (at the pitch I had the IvoProp at, it topped out at around3400 RPM - should have been around 3800), then let her rest at around1200 idling. Finally, started setting up for a flight. Wrong! Once I got in theair, I could see why the Quicksilver Ultralight pilot looked so amused- it was punchy! On the ground, it was maybe 0-4 mph, seemingly niceconditions, but once in the air it was a different story. I did a fewgo-arounds and decided that it was a bit much for me and landeduneventfully. I spent the rest of the afternoon installing the FootSteering, a Reserve Parachute, more velcro for the instruments,getting some more gas and generally tightening everything andpreparing for the evening flight. At just before sunset, I launched again, and enjoyed maybe 30 touch &go's before it got so dark I was squinting to see. I was flying theDudek Synthesis 34 glider, and it worked beautifully with all thatThumper weight (220lbs) dangling from the lines. I trimmed this reflexglider full slow for this flight, and it inflated perfectly everytime(5 inflations) with the A-Assists and was still fast in the air.Looking at the risers, I saw that full slow is actually a bit slowerthan trim speed, so I set the trimmers at 0 (there's actually numberson the trimmer) to put the glider at true neutral for the morning flight.Jerry Frost and Pierre Beney arrived this evening, and we spent a goodbit of time 'Hangar Flying' around the campfire, watching the moon setalong with that planet, really spectacular!The next morning, I warmed the Thumper up for flight. With the twistof the key, she stirred to life and seemed to be content. I let herrun for a good half hour at idle, something I would never do to any ofmy two-strokes (they would coke-up and choke) while I prepared forgoing high. I used a Flytec Vario for climb rate, a Garmin GPSmap 76for better altitude, and my iPhone with the V-Cockpit app running, avery cool airplane instrument application that uses the internal GPSfor navigation. Only problem was the iPhone was so dim that is didn'tcome out in the pictures. You can see one shot of it in the photogallery on the Altitude screen, just one of the many functions thisapp has. Check out the main screen by clicking the small icon here toyour right. It's a really cool Application, and I had fun playing withit as I flew. There's even graphs of the entire flight showingaltutude, speed, climb rate, heading, but no way to save them! At about 8:30, I launched from the Flying "J" Ranch at approximately2850 feet and velcro strapped the throttle at full and sat back andrelaxed, took pictures, video, and wrote down info at each 1000 feetof altitude. On this first flight, I did not write the time down, butyou can see the time on the pictures of the GPS, so it tookapproximately one hour to climb to 8000 feet and 1:25 to climb to12,000 feet. I was still climbing at 12000 feet, but very slowly, andI was cold - I didn't wear enough layers to keep out the chill. Plus,I had not pitched the prop for maximum efficiency, at ground level itwas only 3400, and it got slower as I climbed. The motor ran beautifully the whole time, not even a hiccup. I amamazed by the four-stroker' s incredible reliability. I could get usedto this! Trouble is, when I fly a two-stroke again, I'll be wonderingwhen it will happen.... the inevitable motor-out. This motor is madeto run, and run, and RUN! I let it idle for a few minutes after Ireached 12K, then shut it down for the long glide back down. I reallyenjoyed the views from up high, there was snow on the nearby peaksnear San Bernadino, and I could see all the way to Tehachapi to thenorth and into the LA basin through the El Cajon Pass.

265 266 Vance Brand Airport

Biggest gathering of Denver area Pilots in a couple of years.

Paul Meyer Paul Crazy Ivan Marek Dan Robert Kitilla His son Mark Bennet Some spectators and maybe one or two who's names I cannot recall.

Plus that's not all...Wait there is MORE. Three flights of Scoop Divers.

I should have expected some weirdness when the temp dropped from 57 in Denver to 45 at Vance Brand. there were light winds from the North at 3:00. The first flight was ok ...a little bumpy but ok.

I had to taxi for longer than usual to get off and the climb out seemed slow. First thing I noticed was that the left Brake line was bound in the risers. I was able to free it without problem since

nothing was crossed ...just friction locked.

Max climb was 170 ft / min. I noticed that several of the guys were setting down so I did too. The landing was a bit hard. I killed the motor to0 soon or late and swung under the wing. No damage just didn't look good. If I'm going to come in dead stick I should decide sooner than 10 feet.
Second Flight was a real pucker. After I set-up, the wind shifted. Rather than re-set I waited and launched when the cycle came around to me. The wing came up much better without the "A" Assists. This time I climbed at 180ft/min When I got to 1200 feet it started to get bumpy and I was climbing at 300ft/min! Even at idle I was still climbing over 100ft/min.

What a ride! The wing was alternately surging and falling back and a couple of times I found myself in a hard bank and starting to get weightless. It was one of those times that you can feel the wind shifting by the way it feels on your face. I was no longer flying in a stable mass of air..It was a good thing that I didn't have the full height of pad behind me because the extra visibility came in handy to be able to watch the wing. There were several forward surges and while I never saw the trailing edge ...it was hairy enough. I think that I was perhaps a little timid on the brakes because I couldn't feel the wing and the forces working on it. I was contemplating Big Ears when I finally started to descend. I think I was in the worst of it for 3 or 4 minutes and I made the mistake of turning back into it again before I figured out that it was the west end of the box that was being pulled into the clouds.....NO FUN!

The good news is that the landing was better, I left the motor running and came in at idle.
I've found a better position to hold the throttle but it is still hard get fine control of the RPM's. I look forward to using an FB throttle again!

The next time I see lenticular clouds I'm going to think twice. The didn't seem to be moving but were hanging there sucking up the warmth.

Looking at the profile I was just getting into the nasty stuff when I decided to land on the first flight. It's probably why I took one look at everybody landing and decided to do the same. The guys that stayed below 300 feet had very little turbulence but there were high winds aloft and the clouds were sucking the warm air from below...Big time...Maybe it was a clue when it got warm about 4:20. (from 45 to 50 plus in about 10 minutes. Be Aware when the temp is fluctuating...And watch out when there are lenticular clouds and signs of high winds aloft !
Later on the ground we stood around and it was so obvious to all of us, that it was ugly at altitude.

Today's lessons...
1. Watch out when the temp is bouncing around especially if there are lenticular clouds.
2. To Hell with A Assists!
3. Ease the throttle cable
4. Don't kill the motor at low altitude just to have the prop stopped when you land... come in under power and grease it.

263 264 First Colorado Thumper Vance Brand

Temp 45 to 50 f

Climb 200ft/minute

Decent 200/minute

3550 max RPM

Powerplay Sting 250

It was good to get this one past. I met Robert K and Marek M out at Vance Brand Airport.
We launched at 3pm in light winds from the North East. First attempt went bad when the A Assists were not putting enough pressure on the wing causing it to hang back. On the other launches I got on the assists manually and it came up just fine.
(change the endless clamps so the tails point into the cage instead of out where a line can get into them)
Another thing is to be sure the Starter/Tach bar is on the correct side when attaching the risers.

I accidentally killed the motor at 230 feet, when I noticed the starter bar was being pulled by the riser strap. I had time to try one restart but failed and came in dead stick. Smooth as a baby's butt!

Second flight was great...no problems 200ft/min climb and about the same decent.

Monte's Powerplay Sting was rock solid and the brake pressure was about what I was used to with the old rig.

Marek and I kited Brian's wing...it is 2003... very light construction and absolutely not the right wing for this application....nuff said

I need to find a better way to hold the Throttle or get a different one. The ol fresh Breeze lever would probably be just fine.
The next time I'm going to try using light bungee cord for the A Assist to see if I can get some more pull on the A's and not be pulled forward of the rest of the risers during flight.
One thing that has to be mentioned. At one point I hit this spot on the power band where the noise and vibration was reduced dramatically. It was eerie, for a second I thought the motor died. I think it was a combination of things including including belt slap, prop flutter, and who knows what else. It's too bad that it was at 2250 RPM which won't sustain level flight. But I'll bet it would at sea level with a 62 inch prop!

Flying Circus Wrap Up

The drive home was good. I had a massive cold front following off my left shoulder all the way from Albuquerque. At one point the shadow from the leading edge was playing tag with the truck and we were doing 80 mph! Fortunately it stalled at Raton and I never had to deal with icy roads.
The Arizona Flying Circus was great....frustrating but great. Lots of vendors including ParaToys who would never have been welcome or inclined to attend under Bob's ownership. Nirvana and Paradrenaline were there and their "factory Pilots" put on a great demonstration of flying in ratty air and high winds.
I spent most of my time dealing with equipment issues. The first morning was the most heart breaking because I walked off the field when the battery died. It was two days later that I realized that all I had to do was use the pull start. Doh !
The new cage arrived on Friday afternoon and I spent the afternoon working with Bob Pelloquin to get it assembled and mounted on the frame. As fate would have it there was a crowd of luminaries standing around when it was time to fire it up. Sure Nuff there was a prop strike and one of the tips was damaged. That evening after dinner with Jim King and a couple of other pilots I sat in the hotel room and replaced the blade with one that Johnny Fetz had repaired while at the Salton Sea.
The IVO Prop is an amazing design that enables you to adjust the pitch of all three blades simultaneously by turning a bolt in the hub. Counterclockwise to increase pitch and clockwise to reduce pitch. I had to take it apart and assemble it twice before I got it right but that seems par for the course for me at this fly-in.
The next morning I attempted a launch but the wind picked up and I didn't react fast enough when the wing pulled me backwards. The buggy rolled to the left and I was forced to kill the engine and abort. Jeff Goin was filming so he was able to brief me on what the wing did. I'm going to have to increase the tension on the steering bungees so that it rolls straight. While I was out there a pilot asked me to start the machine so that he could hear it. Right away it was obvious that the prop was badly out of balance.
The rest of the day I spent working on the machine. Bob and I did some creative bending to increase the clearance and Kent helped me out with shortening the blades by 2 inches. I was wary of making the cut but Kent dug in and they are looking good and well balanced now.
Saturday afternoon was the Bowling Ball Cannon and later the Banquet. It's all Good.

260 261 262 Thumper's maiden Voyage

I was a little nervous laying out the wing but the motor started like a champ and the Thumper took off just fine. The brake pressure required was alot more than I was used to. and I didn't like the way the buggy was pitching. Chad didn't think there was anything to worry about but I'm not liking it. After landing Jerry Frost made it a point to tell me that I needed to raise the hang points because I was wheelbarrowing during launch.
The second flight was very short. The machine was so quiet that I forgot to put in plugs and put on the helmet. Right after lift off The hat went through the prop and when I heard the "wack" I was thinking broken prop or worse. I got off the throttle quick and came out of the dive with just barely enough time to flare. I bounced floated and landed. I write that one off to unfamiliar equipment and move on.
The third flight was pretty good. I stayed up maybe 30 minutes and experimented a bit with the wing. It's really hard to pull. There is plenty of power at sea level . I'll know more when I get a chance to fly in Colorado.

Thumper

Today I spoke with Terry L about the CT Trike. I've have been follow the progress of the 4 stroke trike buggy for several months and last week Ben Miller test flew it in Albuquerque. Now that it looks like it is going to fly at altitude I'm looking forward to seeing it at the Salton Sea. Who knows...I might own a 4 stroke soon!