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General control line discussion => Open Forum => Topic started by: Fred Quedenfeld jr on March 16, 2020, 10:45:42 AM
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Any body got an electronic version of the "Doctor" article or the "Build a Better Profile" series that were in the old PAMPA site
thanks
Fred Q
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I've got it. Just under 3MB, so can't really attach here (or at least I haven't figured it out). Email me and I'll send it to you.
berry "dot" steve "at" att "dot" net
Steve Berry
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If you have not already received it, I have Larry Cunningham's old computer and files (wrote Building a Better Profile)
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Here's a link for a PDF of the Doctor article.
https://lafayetteesquadrillecl.files.wordpress.com/2014/06/the-doctor-stunt-article.pdf
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I would also note that the associated 25-sized airplane, The Medic, is the same thing, scaled down. Think of it like a Super Skyray. To be honest, when we got Bob Hazle's old Medic trimmed (after he sold it to Paulette Erickson AKA Mrs Uncle Jimby), I thought it flew better than the prototype Doctor in most conditions, just because it was enough "denser" that it wasn't so prone to getting bounced around in turbulence.
Both airplanes are are *extremely* easy to trim and fly, as intended, with the fingertip control forces. The published plans for the Doctor, I think, are smaller than the original (which was bordering on huge) to try to reduce some of this effect. You never have any real problem in *any* reasonable wind, but the big one sometimes requires huge compensation angles, like flying a kite.
The other thing is that these sort of airplanes illustrate how much engines have improved to a much greater degree than flapped airplanes. The sensitivity of the controls varies strongly with speed, the faster, the more sensitive, which if anything is the opposite of flapped airplanes. This puts a premium on tight speed control and will very quickly show you how much more 4-2 break systems (even good ones) change speed in flight than modern systems running 4" of pitch. Put a 50's stunt engine, even working perfectly as intended, on the Skyray, and it flies like a typical "trainer" from the 50's/60's/70's, i.e. like crap. I could get it through a pattern in a moderate wind, but it took expert-level skill to make it merely recognizable, with a lot of practice. 20FP, it's like falling off a log in any wind you would fly in, and I will pick it up after a few years and fly a 500-point pattern on the first flight.
Both airplanes are highly recommended, and I had forgotten how much Ted and my lectures on the topic of these simple airplanes overlapped. The interesting thing is, I don't recall who did what first! Probably Ted and I just parroted him (since I am just his "mindless puppet", to quote a famous PAMPA politician).
Brett
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Brief , succinct , and to the point . Well. the later two anyway . Good ol' Ted .
Have to be better than some of the books ive attempted to read lately . S?P
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Any body got an electronic version of the "Doctor" article or the "Build a Better Profile" series that were in the old PAMPA site
thanks
Fred Q
Old, as in not available anymore? I tried doing a search for "Build a better" on the PAMPA site, but didn't get anything.
Mark
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Wonder if anyones tried one of these , with flaps . VD~ ;D
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Wonder if anyones tried one of these , with flaps . VD~ ;D
...and piped engine, with 2.4GHz speed control D>K
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Hello
Most models seem to fly better with flaps even if fixed. Both my wife Alina and son Otto Skyrays now have big fixed flaps. Alina's Skyray had an old baffle OS 30 but now has flaps and OSFP40, it now has real authority and fly's so much better in the wind and turns like it never could before. The CG did not move forward as we used a header pipe and the universal OS muffler system designed for the FP40. Otto's Skyray is kitbashed into a Doulgas Skyshark and uses 2.4 ghz throttle when he flies it in profile scale!
Regards Gerald
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Hello
Most models seem to fly better with flaps even if fixed. Both my wife Alina and son Otto Skyrays now have big fixed flaps. Alina's Skyray had an old baffle OS 30 but now has flaps and OSFP40, it now has real authority and fly's so much better in the wind and turns like it never could before. The CG did not move forward as we used a header pipe and the universal OS muffler system designed for the FP40. Otto's Skyray is kitbashed into a Doulgas Skyshark and uses 2.4 ghz throttle when he flies it in profile scale!
Regards Gerald
Just about all straight wing planes fly better with fixed flaps. The Barnstormer specifically wanted the trailing edge(3/16in flap) square and sharp for better performance. This is one of those things full size aeronuts didn't find out until sometime in the 80's maybe.
Never could understand the people is such a hurry always left off the flaps and tips on a Flightstreak. Turned a very nice flying plane into something of a dud due to the reduction wing area and wingspan.
Phil C
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I would also note that the associated 25-sized airplane, The Medic, is the same thing, scaled down. Think of it like a Super Skyray. To be honest, when we got Bob Hazle's old Medic trimmed (after he sold it to Paulette Erickson AKA Mrs Uncle Jimby), I thought it flew better than the prototype Doctor in most conditions, just because it was enough "denser" that it wasn't so prone to getting bounced around in turbulence.
Both airplanes are highly recommended, and I had forgotten how much Ted and my lectures on the topic of these simple airplanes overlapped. The interesting thing is, I don't recall who did what first! Probably Ted and I just parroted him (since I am just his "mindless puppet", to quote a famous PAMPA politician).
Brett
I have the plans for the Medic and am building a Skyray now with 3/32" balsa ribs at every station. I chose to build the Skyray first because of Brett's testimony in other posts on how well it handles crashes, and because the wing of the Medic appeared to be more prone to damage than the Skyray wing. Does anyone have any experience with how well the Medic endures or doesn't endure sudden, unexpected, abrupt contact with the ground?
Signed, "Sir Crash a Lot"
Joe Ed Pederson