Original Posted By: "Jim Markle"
I'm wondering if anyone has realistic performance figures for a Pietenpolwith the stock Model A engine @ gross weight. I suspect more power would bea good thing. From what I can see there has been quite a bit of work donein increasing the horsepower in the lower RPM range. On set of Dynoresults I saw with a replica performance head, needle bearings, 451 pistonsand so forth indicated about 70 HP @ 2500 rpm. Does anyone have experiencewith this sort of modification?Bob________________________________________________________________________________
Pietenpol-List: Pietenpol with model A engine
Re: Pietenpol-List: Pietenpol with model A engine
Original Posted By: robertsjunk
Subject: Re: Pietenpol-List: Pietenpol with model A engineIn a message dated 8/29/03 11:02:03 AM Central Daylight Time, rgow(at)avionicsdesign.ca writes:>Bob,Last summer I had a stock Model A engine on my plane, including the splash oil system, stock aluminum pistons and induction system. I put 22 hours on it.I had a lot of problems with it, ranging from a scored cylinder, to Model B carborator problems. I fought with that engine all summer, and never could getit right. It just didn't produce adequate power, either, as I couldn't get anywhere near pattern altitude on downwind, with a weight of around 950 lbs, however I may have had too much prop on it. I built the prop that Orin Hoopmandrew plans for, but one inch shorter - 75 X 48. When I would pull power to idle, after making the numbers, twice the engine quit running, and a deadsticklanding was made, no problem but a real attention getter !! I AM NOT puttingdown the Model A engine, I'm just relaying my experience with the one I had. I firmly believe that the Model A engine can be built into a strong and fairlyreliable engine. For me, I just got fed up with the one I had.Chuck GantzerNX770CG________________________________________________________________________________Date: Sun, 31 Aug 2003 05:55:10 -0500 (CDT)
Subject: Re: Pietenpol-List: Pietenpol with model A engineIn a message dated 8/29/03 11:02:03 AM Central Daylight Time, rgow(at)avionicsdesign.ca writes:>Bob,Last summer I had a stock Model A engine on my plane, including the splash oil system, stock aluminum pistons and induction system. I put 22 hours on it.I had a lot of problems with it, ranging from a scored cylinder, to Model B carborator problems. I fought with that engine all summer, and never could getit right. It just didn't produce adequate power, either, as I couldn't get anywhere near pattern altitude on downwind, with a weight of around 950 lbs, however I may have had too much prop on it. I built the prop that Orin Hoopmandrew plans for, but one inch shorter - 75 X 48. When I would pull power to idle, after making the numbers, twice the engine quit running, and a deadsticklanding was made, no problem but a real attention getter !! I AM NOT puttingdown the Model A engine, I'm just relaying my experience with the one I had. I firmly believe that the Model A engine can be built into a strong and fairlyreliable engine. For me, I just got fed up with the one I had.Chuck GantzerNX770CG________________________________________________________________________________Date: Sun, 31 Aug 2003 05:55:10 -0500 (CDT)
Re: Pietenpol-List: Japanese girl VS playboy
Original Posted By: "robertsjunk"
Ya gotta wonder what this was suppose to be :)Carl----- Original Message -----
Ya gotta wonder what this was suppose to be :)Carl----- Original Message -----
Re: Pietenpol-List: uprights next to the spars
Original Posted By: "Christian Bobka"
Subject: Re: Pietenpol-List: uprights next to the sparsJeff: I put vertical sticks in my ribs at the spar location - bothspars, front and back of the spar. I found that the vertical piece onthe back of my rear spar interfered with the cable routing when I mademy center section so I removed them. I could make spacers to move thecables out of the way, but it's adding weight. I am going to remove allof the vertical braces on the back side of the rear spar because of thisinterference and weight savings. I think that I will also remove thevertical sticks from the front side of the front spar for more weightsavings. I built my rib jig with openings for the 1" spars per theplans, then noticed later that the spars in my wood kit from WesternAircraft Sup, were 3/4" thick. I will have to install filler stripsunder the the verticals to take up the space in the spar openings causedby the smalle spars. Consider the thickness of the spars before youbuild your rib jig. I'd only put vertical strips in the front of therear spar, and in the rear of the front spae opening. One of my bigdo-overs. Leon S.________________________________________________________________________________
Subject: Re: Pietenpol-List: uprights next to the sparsJeff: I put vertical sticks in my ribs at the spar location - bothspars, front and back of the spar. I found that the vertical piece onthe back of my rear spar interfered with the cable routing when I mademy center section so I removed them. I could make spacers to move thecables out of the way, but it's adding weight. I am going to remove allof the vertical braces on the back side of the rear spar because of thisinterference and weight savings. I think that I will also remove thevertical sticks from the front side of the front spar for more weightsavings. I built my rib jig with openings for the 1" spars per theplans, then noticed later that the spars in my wood kit from WesternAircraft Sup, were 3/4" thick. I will have to install filler stripsunder the the verticals to take up the space in the spar openings causedby the smalle spars. Consider the thickness of the spars before youbuild your rib jig. I'd only put vertical strips in the front of therear spar, and in the rear of the front spae opening. One of my bigdo-overs. Leon S.________________________________________________________________________________
Re: Pietenpol-List:
Original Posted By:
Terry,that is an excellent Idea.Chris Bobka----- Original Message -----
Terry,that is an excellent Idea.Chris Bobka----- Original Message -----