The problem with wide chord Open Pennyplanes my dad and I found is
flight consistency. My dad did over 19minutes at Akron with a monoplane
but it was finicky. Sometimes for no reason it would stall on climbout
about 90 feet up on the power burst, another time it would suddenly dive
at the end of the flight. We attributed this to being close coupled and
insufficient tail volume due to the OAL restriction. The biplanes were
much more constant on a repeated basis. Fiddling with my spreadsheet is
where I came up with the idea of a 24" OAL on monoplane in OPP but
retain the 20" OAL for models with more than one wing. I thought it
would make them a little more even with each other. Tom Vallee flew a
wide chord large tail OPP for years and his model would stall all the
time on the way up. It was always hard to find a balance , if you got a
good climb to the top of Akron you might get a bad cruise, get a good
cruise then stall on the way up and could not get to the roof. Biplanes
did not do this.
On 2/1/2016 1:30 PM, joshuawfinn_at_gmail.com [Indoor_Construction] wrote:
>
> Don,
>
>
> I've built a couple OPP monoplanes and it seems like they could be
> competitive. There are tricks to be performed and such. It's probably
> more a thing of just getting the prop tuned correctly though. They can
> definitely absorb a lot of power, that's for sure.
>
>
>
>
--
Don Slusarczyk
Received on Mon Feb 01 2016 - 15:09:38 CET