Re: No touch LPP flying in Cat I

From: Yuan Kang Lee <ykleetx_at_gmail.com>
Date: Tue, 07 Jun 2011 01:11:48 -0000

Here are the 5 flights I made at the gym yesterday. I used three different motors -- the two heavier ones I cut down for their second winds.

(hopefully the figures below will format okay)

My winder is 15X.


len wt turns torq backoff torq Time Remain RPM
9.8 1.08 85 0.7 12 0.25 5 30 15 158
14.5 1.88 117 0.7 15 0.26 5 38 40 165
15 1.82 121 0.8 20 0.25 5 19 45 158
13.25 1.62 110 0.8 20 0.24 5 19 27 178
13 1.6 112 0.9 16 0.29 5 44 30 173

If you look at the 1st, 4th, and 5th flights, the turns remaining are closer to the back off turns. My sense is that with a good flaring prop, you can back off a little less, so that an efficient use of the motor might have more turns remaining than turns backed off. Just a thought.

John, I understand that centering the torque curve is a good rule of thumb, but I can't quite understand why it makes sense. What is your thought here?

Thanks.

-Kang



--- In Indoor_Construction_at_yahoogroups.com, "John Kagan" <john_kagan@...> wrote:
>
> Hi Kang,
>
> What were your backoff turns and leftover turns? I try to center the flight in the torque curve, with a similar number of backoff and leftover. In low sites this naturally leads to shorter, fatter motors to keep from having a ton more turns leftover.
>
> --- In Indoor_Construction_at_yahoogroups.com, "Yuan Kang Lee" <ykleetx@> wrote:
> >
> > Now, I'll make it a challenge to get the right flaring prop to do 6 minutes in this gym flying no-touch or light-touch. I won't fly there for another two months, at least. But stay tuned.
> >
> > I already miss flying in the mini-dome at Johnson City ....
> >
>
Received on Mon Jun 06 2011 - 18:12:07 CEST