Original Posted By: "walter evans"
Subject: Pietenpol-List: Deep thoughtsPieters,Have followed the discussion of angle of aircraft at rest with interest. I too went out with my protractor level and discovered ole 41CC is snugly perched at 9 1/2 o. I also measured my engine (crank shaft) angle. Guess what 5 1/2 o. Thats a downthrust of foe degrees. Being the greatest Tuba player outside the fatherland, frankly I don't know my a-- from 5th base on these technicals. Please, some of you Purdue Engineer grads or any other school advise me about this engine angle. I've brought this up several times on the net but the conversation usually drifts off to wheels, spokes, materials used for sticks etc. Hope I can create some discussion about this engine angle stuff. I have a volunteer test pilot. A real nice guy. And I really don't want him to experience any more problems than necessary. Hell, funerals are more expensive than Piets.Corky in La eating MB&Spaghetti tonite.________________________________________________________________________________
Pietenpol-List: Deep thoughts
Re: Pietenpol-List: Deep thoughts
Original Posted By:
Corky and all,Just a few days ago I was reading the "Flying and glider manual" and Bernardsaid something like,,,"I angled the engine down, because since the planeflies with a positive angle of attack, I still want the engine to pull inthe direction that the plane is going., not in the way it's pointing" ( thisis no way a quote, only what I thought he was saying)walt----- Original Message -----
Corky and all,Just a few days ago I was reading the "Flying and glider manual" and Bernardsaid something like,,,"I angled the engine down, because since the planeflies with a positive angle of attack, I still want the engine to pull inthe direction that the plane is going., not in the way it's pointing" ( thisis no way a quote, only what I thought he was saying)walt----- Original Message -----
> Pietenpol-List: Deep thoughts
Original Posted By: "Ed Grentzer"
Corky...I set my Franklin mount up with a 1" drop in 22" like the plans show for the model A mount and the Corvair mount and ended up reading 2 1/2 degrees on the protractor. I doubt that an extra 1 1/2 degrees would hurt anything but I'm new at this stuff so you might run those numbers by one of those engineerin' type guys for a secondopinion. Ed G.>From: Isablcorky(at)aol.com>Reply-To: pietenpol-list(at)matronics.com>To: pietenpol-list-digest(at)matronics.com>Subject: Pietenpol-List: Deep thoughts>Date: Wed, 13 Mar 2002 19:50:15 EST>>>Pieters,>Have followed the discussion of angle of aircraft at rest with interest. I>too went out with my protractor level and discovered ole 41CC is snugly>perched at 9 1/2 o. I also measured my engine (crank shaft) angle. Guess >what>5 1/2 o. Thats a downthrust of foe degrees. Being the greatest Tuba player>outside the fatherland, frankly I don't know my a-- from 5th base on these>technicals. Please, some of you Purdue Engineer grads or any other school>advise me about this engine angle. I've brought this up several times on >the>net but the conversation usually drifts off to wheels, spokes, materials >used>for sticks etc. Hope I can create some discussion about this engine angle>stuff. I have a volunteer test pilot. A real nice guy. And I really don't>want him to experience any more problems than necessary. Hell, funerals are>more expensive than Piets.>Corky in La eating MB&Spaghetti tonite.>>Join the worlds largest e-mail service with MSN Hotmail. http://www.hotmail.com________________________________________________________________________________
Corky...I set my Franklin mount up with a 1" drop in 22" like the plans show for the model A mount and the Corvair mount and ended up reading 2 1/2 degrees on the protractor. I doubt that an extra 1 1/2 degrees would hurt anything but I'm new at this stuff so you might run those numbers by one of those engineerin' type guys for a secondopinion. Ed G.>From: Isablcorky(at)aol.com>Reply-To: pietenpol-list(at)matronics.com>To: pietenpol-list-digest(at)matronics.com>Subject: Pietenpol-List: Deep thoughts>Date: Wed, 13 Mar 2002 19:50:15 EST>>>Pieters,>Have followed the discussion of angle of aircraft at rest with interest. I>too went out with my protractor level and discovered ole 41CC is snugly>perched at 9 1/2 o. I also measured my engine (crank shaft) angle. Guess >what>5 1/2 o. Thats a downthrust of foe degrees. Being the greatest Tuba player>outside the fatherland, frankly I don't know my a-- from 5th base on these>technicals. Please, some of you Purdue Engineer grads or any other school>advise me about this engine angle. I've brought this up several times on >the>net but the conversation usually drifts off to wheels, spokes, materials >used>for sticks etc. Hope I can create some discussion about this engine angle>stuff. I have a volunteer test pilot. A real nice guy. And I really don't>want him to experience any more problems than necessary. Hell, funerals are>more expensive than Piets.>Corky in La eating MB&Spaghetti tonite.>>Join the worlds largest e-mail service with MSN Hotmail. http://www.hotmail.com________________________________________________________________________________
> Pietenpol-List: Deep thoughts
Original Posted By: Isablcorky(at)aol.com
I think I remember someone posting that the Continental mount could be shimmed with washers under the mounts to make minor adjustments. Ed>From: Isablcorky(at)aol.com>Reply-To: pietenpol-list(at)matronics.com>To: pietenpol-list-digest(at)matronics.com>Subject: Pietenpol-List: Deep thoughts>Date: Wed, 13 Mar 2002 19:50:15 EST>>>Pieters,>Have followed the discussion of angle of aircraft at rest with interest. I>too went out with my protractor level and discovered ole 41CC is snugly>perched at 9 1/2 o. I also measured my engine (crank shaft) angle. Guess >what>5 1/2 o. Thats a downthrust of foe degrees. Being the greatest Tuba player>outside the fatherland, frankly I don't know my a-- from 5th base on these>technicals. Please, some of you Purdue Engineer grads or any other school>advise me about this engine angle. I've brought this up several times on >the>net but the conversation usually drifts off to wheels, spokes, materials >used>for sticks etc. Hope I can create some discussion about this engine angle>stuff. I have a volunteer test pilot. A real nice guy. And I really don't>want him to experience any more problems than necessary. Hell, funerals are>more expensive than Piets.>Corky in La eating MB&Spaghetti tonite.>>Join the worlds largest e-mail service with MSN Hotmail. http://www.hotmail.com________________________________________________________________________________
I think I remember someone posting that the Continental mount could be shimmed with washers under the mounts to make minor adjustments. Ed>From: Isablcorky(at)aol.com>Reply-To: pietenpol-list(at)matronics.com>To: pietenpol-list-digest(at)matronics.com>Subject: Pietenpol-List: Deep thoughts>Date: Wed, 13 Mar 2002 19:50:15 EST>>>Pieters,>Have followed the discussion of angle of aircraft at rest with interest. I>too went out with my protractor level and discovered ole 41CC is snugly>perched at 9 1/2 o. I also measured my engine (crank shaft) angle. Guess >what>5 1/2 o. Thats a downthrust of foe degrees. Being the greatest Tuba player>outside the fatherland, frankly I don't know my a-- from 5th base on these>technicals. Please, some of you Purdue Engineer grads or any other school>advise me about this engine angle. I've brought this up several times on >the>net but the conversation usually drifts off to wheels, spokes, materials >used>for sticks etc. Hope I can create some discussion about this engine angle>stuff. I have a volunteer test pilot. A real nice guy. And I really don't>want him to experience any more problems than necessary. Hell, funerals are>more expensive than Piets.>Corky in La eating MB&Spaghetti tonite.>>Join the worlds largest e-mail service with MSN Hotmail. http://www.hotmail.com________________________________________________________________________________
Re: Pietenpol-List: Deep thoughts
Original Posted By: "Christian Bobka"
Subject: Re: Pietenpol-List: Deep thoughtsEd,Tomorrow I will add washers between the lower engine rubbers and mount until I reach 3 or 3 1/2. Maybe by then one of those engineer types will come forward with some aeronautical theories. Glad we don't have any Texas Aggies building Piets. Might be flying backwards. All in fun.Corky an LSU Tiger in La but I didn't study Engineering but can play a hell of a Tuba.________________________________________________________________________________
Subject: Re: Pietenpol-List: Deep thoughtsEd,Tomorrow I will add washers between the lower engine rubbers and mount until I reach 3 or 3 1/2. Maybe by then one of those engineer types will come forward with some aeronautical theories. Glad we don't have any Texas Aggies building Piets. Might be flying backwards. All in fun.Corky an LSU Tiger in La but I didn't study Engineering but can play a hell of a Tuba.________________________________________________________________________________
RE: Pietenpol-List: Deep thoughts
Original Posted By: owner-pietenpol-list-server(at)matronics.com
I'm not understanding your question about the engine downthrust angle. Areyou questioning why it is the angle it is or why is it even there in thefirst place?That downthrust helps you on not having to step on alot of right rudder inclimb by reducing the result of P-factor. Also helps in not having to pushthe stick real hard when you slam the throttle forward from slow or cruiseflight. You may even have a touch of right thrust in there as well.Why yours is 5 degrees is a question for an aero engineer.DJ-----Original Message-----
I'm not understanding your question about the engine downthrust angle. Areyou questioning why it is the angle it is or why is it even there in thefirst place?That downthrust helps you on not having to step on alot of right rudder inclimb by reducing the result of P-factor. Also helps in not having to pushthe stick real hard when you slam the throttle forward from slow or cruiseflight. You may even have a touch of right thrust in there as well.Why yours is 5 degrees is a question for an aero engineer.DJ-----Original Message-----
> Re: Pietenpol-List: Deep thoughts
Original Posted By: clif