It flies well!
On 5/18/2012 6:21 PM, Rick121x wrote:
>
> First, let me thank you for your replies and suggestions.I appreciate
> them very much. I built it to "ordinary" pennyplane specs, not
> "limited". I have yet to try winding to the max then unwinding to
> desired launch torque. Here is a link to a video of my plane a few
> days ago, which should much more clearly describe a typical flight.
>
> My pennyplane flight
> <http://www.youtube.com/watch?v=Vkekny2Yd0Y&feature=channel&list=UL>
>
> I am very concerned about getting in the ceiling beams - they are very
> aggressive in holding onto indoor planes! Oh yes, and I was wrong
> about the prop rpm - it is clearly a good deal faster than 1.5 rpm!
>
> Richard
>
> --------------------------
> --- In Indoor_Construction_at_yahoogroups.com, "Rick121x"
> <rickie121x_at_...> 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 Fri May 18 2012 - 16:30:47 CEST