---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Sun 11/09/14: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:48 AM - Re: Trombone bungee trim (Jeff Boatright) 2. 03:30 PM - Re: A Great Film Showing Grassroots Aviation (Charles N. Campbell) 3. 03:41 PM - Re: Rib stitching question (Charles N. Campbell) 4. 04:30 PM - Re: Trombone bungee trim (taildrags) 5. 04:46 PM - Saturday flight (taildrags) 6. 06:16 PM - Re: Ray Allen electric trim servo (Chris Rusch) 7. 07:53 PM - Re: Trombone bungee trim (Jeff Boatright) ________________________________ Message 1 _____________________________________ Time: 07:48:13 AM PST US Subject: Pietenpol-List: Re: Trombone bungee trim From: "Jeff Boatright" Sorry, I was having trouble interacting with the Matronics site last night. Here's the original message that the photos above are a follow-up to: I have a new movie up in which I'm testing a trim system comprised of a bungee cord and a clothesline tightener: https://www.youtube.com/watch?v=xfUMSuEMEwc The movie doesn't show the trim system (I will post pictures later if it really works out). What the movie shows is that the system will hold my Piet right at 55 mph from abeam the numbers to roll out, with no input from me (other than a short shot of throttle to clear the fence!). This was a good thing because the sun was in my eyes and I had very little sight down the runway. The trim system was sort of "land-o-matic" So, my Piet is fairly easily trimmed for downwind-base-final-landing. I played around with it at altitude, and even if I don't use the tightener "valve" to release the bungee, I can still power up as though to do a go round. It does require a hefty amount of forward pressure to overcome the bungee, though. Obviously the idea is to pull the tightener valve to relieve bungee tension when it's not needed. I also used the system to play around in slow flight, and spent some time doing 30 degree banked lazy eights and 360s at 45-50 mph. Rock steady (though this was in the evening, so there were no up/downdrafts and little wind). The tightener was cheap (under $5 from Ace Hardware) and looks like this: http://farm8.staticflickr.com/7131/7559033132_e9231e5594.jpg Imagine the line on the left being a bungee cord hooking to the rear of the control stick torque tube. On the right, the tightener U-ring is attached to the control stick just below the control stick hand grip instead of to the eyebolt in the photo. If you want to trim for "up", pull the bungee cord that sticks out of the tightener valve. This stretches the bungee and locks it into that length. The bungee tension holds the stick back. If you want to release that trim, pull on the valve (it's mouth is shaped like a trumpet or trombone bell). It's clunky to use right now, so I may optimize it a bit. However, even as it is, it's meets my main goal of trimming for the pattern. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=433216#433216 ________________________________ Message 2 _____________________________________ Time: 03:30:48 PM PST US Subject: Re: Pietenpol-List: A Great Film Showing Grassroots Aviation From: "Charles N. Campbell" I just returned from Corvair College #31 in Barnwell where the video was made last year. I ran my Corvair engine for the first time Saturday morning. Unless you have experienced the thrill of seeing and hearing the engine that you built up with your bare hands you just can't imagine what it felt like when William pushed the starter button the first time and the engine roared to life. What a thrill. Tears came to my eyes -- I couldn't help it. Everyone should build up an engine even if you are never going to fly behind it. It's an experience you will never forget. Chuck On Thu, Nov 6, 2014 at 4:57 PM, jarheadpilot82 wrote: > jarheadpilot82@hotmail.com> > > The EAA just posted the following short video on YouTube - > > http://youtu.be/wvXAX0C2q5c > > It is a short video based on a longer video that was released to all EAA > chapters this morning. It is a video by Brady Lane highlighting Corvair > College last November in Barnwell SC. Hats off to our very own P.F. Beck > and his team for hosting the Corvair College. They do an awesome job > supporting everyone. The EAA felt strong enough that this is a great > example of grassroots aviation that they made the film and seni it out. > > Seeing some of our very own, like P.F., Dick Navratil and Bob Dewenter is > great, but seeing the camaraderie of the builders is the story. Seeing a > grandson and his grandfather hug as they watch their engine run on the test > stand is just not to be missed. No matter what aircraft you are building or > what engine you are using, if this video doesn't motivate you, then as they > say, "you just ain't right!" > > -------- > Semper Fi, > > Terry Hand > Athens, GA > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=433007#433007 > > ________________________________ Message 3 _____________________________________ Time: 03:41:00 PM PST US Subject: Re: Pietenpol-List: Rib stitching question From: "Charles N. Campbell" Jim, I was thinking the same thing. I am considering gluing the fabric to the ribs before tautening and rib stitching. What says the experts who have already been down this road? Chuck On Fri, Nov 7, 2014 at 7:27 AM, Jim Markle wrote: > jim_markle@mindspring.com> > > 2 1/2" spacing pulls the fabric up against the ribs in the under camber > area on the bottom of the wing. 3 1/2" spacing leaves a little gap between > stitches. Is it worth making that area 2 1/2" spacing to avoid that gap? > > Sent from my smartphone. > > ________________________________ Message 4 _____________________________________ Time: 04:30:29 PM PST US Subject: Pietenpol-List: Re: Trombone bungee trim From: "taildrags" Well, it's simple alright! Seeing your handheld and radio stuff in the cockpit reminds me of what a pain mine is. I've got to do something different, because it's driving me nuts. Mine is a little Icom IC-A23 and what I do is clip it to the map holder down by my right calf using the belt clip on the back of the battery case. Well, that's fine until I pull the radio out to change frequencies. If I'm not real careful, the battery case snaps off and my radio is dead. Then I get to do the stick-between-my-knees shuffle, pull off one or both gloves and hope they don't fly out, fumble around for the battery and clip, get everything back together, power up the radio, and then pull the airplane out of a screaming, diving left corkscrew spiral ;o) I've got to find my Bill Rewey "handy details" and bend up one of his radio brackets to hold it up where I can see it and get to the buttons easier. -------- Oscar Zuniga Medford, OR Air Camper NX41CC "Scout" A75 power Read this topic online here: http://forums.matronics.com/viewtopic.php?p=433229#433229 ________________________________ Message 5 _____________________________________ Time: 04:46:13 PM PST US Subject: Pietenpol-List: Saturday flight From: "taildrags" The Air Camper worked its magic for me again yesterday. We've had some gray and drizzly mornings lately, but it usually breaks up after lunch and we get a couple of hours of sunshine. Gambling on that happening, I went out to the hangar after lunch and prepared for flight. As I was preflighting, the sky was clearing and by the time I was ready to roll the airplane out, it was beautiful with calm winds and almost no traffic. I had been correcting the camber on my axles, because it had been uneven from one side to the other and I had used washers to shim the axles out rather than the proper tapered shims. There are a couple of pictures of the shimming here: http://www.flysquirrel.net/piets/axle.html . I also replaced a tire and tube on one side, but everything was done and the airplane was ready to fly. So was I! Interesting little 'chat' with the ground controller, as he said my call sign was incorrect. "November Xray Four One Charlie Charlie", I repeated. "One Charlie Charlie, Is that what's painted on your tail?" he asks. "Four One Charlie Charlie, roger." That ended that little discussion, but I bet he went to find out about that NX- tail number. Beautiful day, smooth flight, on runup the RPM drop was textbook perfect on carb heat and both mags, and off we went. I've finally started listening to you pilots who suggest just letting it fly itself off. I'd always been taught to hold forward stick to bring the tail up, hold it, then rotate when the airspeed was good. Nahh... there is no need. Scout needs considerable forward stick force to pick up the tail early, so yesterday instead of forcing it, I just tried letting it do what it wanted and that worked great. We lifted off and climbed out like the airplane knew what it was doing. A very nice bit of sightseeing in the autumn air with autumn colors everywhere, then some power on and power off stalls (non events), then back to the field. I must say that the landing was the best that I have made in a very, very long time. One of those where you roll out from base to final with the runway centerline stripes just falling in perfect alignment with the center of the prop and then not budging. Down the glideslope with out even stirring the stick, down into ground effect, ease the stick back... back... back- and I was down without even knowing when it happened. This is why we fly Piets. -------- Oscar Zuniga Medford, OR Air Camper NX41CC "Scout" A75 power Read this topic online here: http://forums.matronics.com/viewtopic.php?p=433230#433230 ________________________________ Message 6 _____________________________________ Time: 06:16:37 PM PST US Subject: Pietenpol-List: Re: Ray Allen electric trim servo From: "Chris Rusch" Jack, we are on the same page, I did mine exactly like yours... -------- NX321LR Now test flying!! Mitsubishi Powered Read this topic online here: http://forums.matronics.com/viewtopic.php?p=433233#433233 Attachments: http://forums.matronics.com//files/image_475.jpg ________________________________ Message 7 _____________________________________ Time: 07:53:52 PM PST US Subject: Pietenpol-List: Re: Trombone bungee trim From: "Jeff Boatright" taildrags wrote: > Well, it's simple alright! Seeing your handheld and radio stuff in the cockpit reminds me of what a pain mine is. I've got to do something different, because it's driving me nuts. Mine is a little Icom IC-A23 and what I do is clip it to the map holder down by my right calf using the belt clip on the back of the battery case. Well, that's fine until I pull the radio out to change frequencies. If I'm not real careful, the battery case snaps off and my radio is dead. Then I get to do the stick-between-my-knees shuffle, pull off one or both gloves and hope they don't fly out, fumble around for the battery and clip, get everything back together, power up the radio, and then pull the airplane out of a screaming, diving left corkscrew spiral ;o) I've got to find my Bill Rewey "handy details" and bend up one of his radio brackets to hold it up where I can see it and get to the buttons easier. I use Ram cell phone mounts. Not the cheapest, but I find they are versitile and do not fail. Put several more landings in yesterday and today using the very simple trim system. About a dozen so far since installation. Rock solid at 55 mph from downwind to base to final to landing. No doubt such a Rube Goldberg solution is not to everyone's taste, but works for me. If problems arise I'll let you all know. 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