Richard
Without trying to get into your questions can you clarify what class
model you are flying? It looks like a Limited Pennyplane but that class
has a 12" limit on prop diameter. Having a prop that is that much larger
than the legal size will make any data that people might share pretty
irrelevant.
On 4/19/2012 6:31 PM, Rick121x wrote:
>
> I am a fairly new indoor flier and have designed and built a
> pennyplane from the "best" information I could assemble. Pictures
> posted in folder " Richards Pennyplane". It weighs 3.2 grams (with
> prop), and all other details are basic per AMA rules. I am using a
> balsa sheet, 15" dia., 25" pitch propeller. (It weighs 1.2 grams.) -
> and 3/32 in. "A to Z" (Peck Polymers) Supersport rubber from my
> hobby-shop. Rubber lube is STP "Son of a Gun", and seems to work very
> nicely.
>
> The wing is simplex 4%, and the stab is circular 3%. Thrust is
> zero-zero, stab is at zero, and the wing, 4.4 deg.
>
> I set up the plane using the "ten step adjustment process", and it
> flys "right on the verge" of a stall. It reliably recovers from a
> rafter beam "hit". The flight balance location is 88% wing chord.(With
> prop and rubber.)
>
> It flies in approx. 14 foot circle and the climb is just beautiful to
> see, flying very slowly at about 15 degrees attack angle. With the
> climb loading the prop, it turns quite slowly, ...estimate 1.2 to 1.5
> rev. per second.
>
> Right now I am using a 1/2 length motor with weighted spacer, and
> winding to 0.5 ounce-inch torque, I am getting lovely flights in a 25
> foot ceiling - 2 1/2 to 3 minutes. But I would believe the cruise
> period is very short. The motor has roughly 1/2 length of "knots" at
> landing. If I put in more turns the climb is too high, and with a
> longer motor, the flight is longer, but of variable heights, with the
> causes unknown to me.
>
> I would very much like to achieve a longer cruise time and and with
> slower descent. Is there anyone with experience to suggest the next
> logical step to me to take?
>
>
Received on Thu Apr 19 2012 - 19:15:20 CEST
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:47 CET