Original Posted By: Tim Willis
Subject: Pietenpol-List: Continental Motor mount plans-- downthrust specificallyFor any of you (like Greg Cardinal) FLYING behind Continental motor mounts thatyou built from Pietenpol plans, did you build in the downthrust as per plans---if so, anycomments ?________________________________________________________________________________Date: Thu, 25 Jun 2009 12:31:06 -0500 (GMT-05:00)
Pietenpol-List: Continental Motor mount plans-- downthrust specifically
Re: Pietenpol-List: Continental Motor mount plans-- downthrust specifically
Original Posted By: Cuy, Michael D. (GRC-RXD0)[ASRC Aerospace Corporation]
The downthrust on NX18235 is per the plans. It displays a slight tendency to go "nose down" when I let go of the stick. It is the same at all throttle settings so that indicates it is an aerodynamic issue and not related to motor mount downthrust.Any builder weighing more than 180# might want to consider extending the motor mount 1 or 2 inches.Greg ----- Original Message -----
The downthrust on NX18235 is per the plans. It displays a slight tendency to go "nose down" when I let go of the stick. It is the same at all throttle settings so that indicates it is an aerodynamic issue and not related to motor mount downthrust.Any builder weighing more than 180# might want to consider extending the motor mount 1 or 2 inches.Greg ----- Original Message -----
Pietenpol-List: Continental Motor mount plans-- downthrust specifically
Original Posted By: Wizzard187(at)aol.com
Mikee asked:>For any of you (like Greg Cardinal) FLYING behind Continental motor>mounts that you built from Pietenpol plans, did you build in the>downthrust as per plans---if so, any comments ? Greg replied:>The downthrust on NX18235 is per the plans. It displays a slight>tendency to go "nose down" when I let go of the stick. It is the same>at all throttle settings so that indicates it is an aerodynamic issue>and not related to motor mount downthrust. Any builder weighing more>than 180# might want to consider extending the motor mount 1 or 2 inches.So, I took my Pietenpol plan sheet showing the Cont. engine mount out tothe hangar and started checking dimensions of the mount on 41CC to seewhat I have. Turns out that my mount has about 1/8" of downthrust builtinto the mount and that may not have even been intentional. The planscall for 9/16" differential between top andbottom mounts and 41CC has a couple of washers amounting to maybe halfthat differential and the washers are only on one side to compensate forP-factor. My airplane handles a lot like Greg's sounds like his does.I also found that my mount places the engine 2-3/4" farther forward thanthe plans call for. I didn't know that! Every time I study somethingon this airplane, I grow to admire Joe Czaplicki and Corky Corbett moreand more because everything they did on it made for a very nice flyingairplane. I guess I should try flying other Piets to see how theyhandle compared to this one, but 41CC is light, comfortable, stable,and it never fails to please. All this talk about slow in roll, heavyin turns, and sinks like a brick with power off don't mean a thing tome because this airplane is a real pleasure to fly. It's no Pitts butwhen I leave the pattern to go on patrol, me and the airplane are onthe same wavelength and I don't have to watch it every minute. And inthe pattern- the airplane is still my instructor but it always rewardsme when I handle the controls like a pilot and not like a kit builder.Oops... did I just say that? ;o)Oscar ZunigaAir Camper NX41CCSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net________________________________________________________________________________
Mikee asked:>For any of you (like Greg Cardinal) FLYING behind Continental motor>mounts that you built from Pietenpol plans, did you build in the>downthrust as per plans---if so, any comments ? Greg replied:>The downthrust on NX18235 is per the plans. It displays a slight>tendency to go "nose down" when I let go of the stick. It is the same>at all throttle settings so that indicates it is an aerodynamic issue>and not related to motor mount downthrust. Any builder weighing more>than 180# might want to consider extending the motor mount 1 or 2 inches.So, I took my Pietenpol plan sheet showing the Cont. engine mount out tothe hangar and started checking dimensions of the mount on 41CC to seewhat I have. Turns out that my mount has about 1/8" of downthrust builtinto the mount and that may not have even been intentional. The planscall for 9/16" differential between top andbottom mounts and 41CC has a couple of washers amounting to maybe halfthat differential and the washers are only on one side to compensate forP-factor. My airplane handles a lot like Greg's sounds like his does.I also found that my mount places the engine 2-3/4" farther forward thanthe plans call for. I didn't know that! Every time I study somethingon this airplane, I grow to admire Joe Czaplicki and Corky Corbett moreand more because everything they did on it made for a very nice flyingairplane. I guess I should try flying other Piets to see how theyhandle compared to this one, but 41CC is light, comfortable, stable,and it never fails to please. All this talk about slow in roll, heavyin turns, and sinks like a brick with power off don't mean a thing tome because this airplane is a real pleasure to fly. It's no Pitts butwhen I leave the pattern to go on patrol, me and the airplane are onthe same wavelength and I don't have to watch it every minute. And inthe pattern- the airplane is still my instructor but it always rewardsme when I handle the controls like a pilot and not like a kit builder.Oops... did I just say that? ;o)Oscar ZunigaAir Camper NX41CCSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net________________________________________________________________________________