Quadra 35 and Model Tech Cap 21 (72" wing) - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Large Engines Discuss Engines Used on Giant Scale Aircraft. Gas/Glow, as long as they're big!

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Old 03-25-2007, 10:57 PM   #11
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I am: Gord C
Join Date: Sep 2002
Location: kingston Ont.

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Hi Moe:
The Cap 10 is better known as the Snap 10. If you yank full el. at high speed, it does the quickest snap you've ever seen, with no other input. At low speed it's fine and has landing flaps and is such a clean plane, it's hard to slow down without them. I think one of the reasons it makes a good aerobatic plane is its ability ability to make it tipstall so easy.The elliptical wing is quite thin at the outer leading edge. It weighs around 16 lbs. The Cap 231 is much more stable but is not as aerobatic The leading edge is about the same profile out to the tip. So at the tip, the wing profile is of a thicker %. It weighs around 14 lbs. Also the cap 10 wing is balsa sheeted foam. and the Cap 231 is much lighter built up. I modified the mufflers by brazing the pipes inside the front part of the muffler and made an aluminum plate in place of the back cover where the pipes came out. To make it quieter too, while the pipes were out, I squeezed the inner end almost closed except for about 1/16. Next, on either side I made a cut with a hacksaw halfway through the muffler. make another cut on the other side of the muffler about 1/4 in. further down the pipe towards the outlet. Another cut on the other side of the pipe. Back and forth till you come to where the pipe exits the can. Cut holes in the inner can for the pipes and braze them in making sure there is room for the inside tubes for the muffler bolts. Takes some of the bark out of the muffler with no change in performance. Fellow at the field with the same motor but unmodified muffler turned the same RPM with the same prop. Hope this helps.
Tried for my kamikazi pilots licence. Flunked the test.
MAAC 5276
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