I thank each of you for the wonderful reples to my question. But I quite
easily have either missed the point or just don't understand... The
plane is still flying the same way - about 3 minutes. I now have a video
of how it flies... Possibly that may make the problem or the answers
more applicable.
A typical 3 min flight
<
http://www.youtube.com/watch?v=Vkekny2Yd0Y&feature=youtube_gdata>
Please don't lose patience with me!
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 Wed May 23 2012 - 19:42:17 CEST