Re: Pietenpol-List: Props for Model A Piet
Posted: Tue Apr 24, 2001 10:03 pm
Original Posted By: Jack Phillips
Subject: Re: Pietenpol-List: Props for Model A PietIn a message dated 4/24/01 6:05:40 PM Pacific Daylight Time, pietlars(at)gate.net writes:> I am ready to acquire a prop for my A powered Piet; need some input from> folks who gone down this road before.> > Plant to purchase a prop and am currently considering a 76 x 42 prop as> Howard Henderson used on his bird after making 3 different props . (per> info in one of the old BPA newsletters)> > That seems to be a good choice ; of course I have no experience to judge> by except that Howard seemed to be a very savvy guy and he produced an> excellent piet.> > Lou,When I read the Piet manual from Don pietenpol, It stated to to use a 48' pitch and the plans call for a 76' dia prop. So, I bought the prop plan from Orin Hoopman and built it. It is as close to 48' as I can measure. It gives very nice cruise perofmance ( a full 70 MPH @ about 1650 RPM), but is weak on climb with two people, fine with one. Because of that I don't carry a passenger, but like the cruise performance. I have a nice article on Howards piet in Feb 1989 Sport aviation and have spent a good deal of time chatting with him on the Ham radio net some time ago. He mentioned that his prop was a 72/42 and his plane cruised 60ish @ 1750 RPM. I made a note of it in my magizine at that time so I wouldn't forget. His plane would carry two with this prop and he gave lots of rides a Broadhead I am told. Sounds like your choice of 76/42 might be a great compromise for good climb with two and good cruise also. I know that cruise is not all that important in a piet, but I like the way it planes at 70, so for now am happy with my 76/48 . Press on. Doug Bryant Wichita Ks ________________________________________________________________________________Date: Wed, 25 Apr 2001 07:23:45 -0400 (EDT)
Subject: Re: Pietenpol-List: Props for Model A PietIn a message dated 4/24/01 6:05:40 PM Pacific Daylight Time, pietlars(at)gate.net writes:> I am ready to acquire a prop for my A powered Piet; need some input from> folks who gone down this road before.> > Plant to purchase a prop and am currently considering a 76 x 42 prop as> Howard Henderson used on his bird after making 3 different props . (per> info in one of the old BPA newsletters)> > That seems to be a good choice ; of course I have no experience to judge> by except that Howard seemed to be a very savvy guy and he produced an> excellent piet.> > Lou,When I read the Piet manual from Don pietenpol, It stated to to use a 48' pitch and the plans call for a 76' dia prop. So, I bought the prop plan from Orin Hoopman and built it. It is as close to 48' as I can measure. It gives very nice cruise perofmance ( a full 70 MPH @ about 1650 RPM), but is weak on climb with two people, fine with one. Because of that I don't carry a passenger, but like the cruise performance. I have a nice article on Howards piet in Feb 1989 Sport aviation and have spent a good deal of time chatting with him on the Ham radio net some time ago. He mentioned that his prop was a 72/42 and his plane cruised 60ish @ 1750 RPM. I made a note of it in my magizine at that time so I wouldn't forget. His plane would carry two with this prop and he gave lots of rides a Broadhead I am told. Sounds like your choice of 76/42 might be a great compromise for good climb with two and good cruise also. I know that cruise is not all that important in a piet, but I like the way it planes at 70, so for now am happy with my 76/48 . Press on. Doug Bryant Wichita Ks ________________________________________________________________________________Date: Wed, 25 Apr 2001 07:23:45 -0400 (EDT)