Re: No touch LPP flying in Cat I

From: Yuan Kang Lee <ykleetx_at_gmail.com>
Date: Mon, 06 Jun 2011 18:32:10 -0000

Josh,

The ceiling is really low in this gym. Climbing 20' in 60s is really slow! I launch at .24 in-oz with a smallish prop set at 23" pitch. The prop blades are very thin and flex a good amount. One difference with your situation may be the ceiling height. To get to 25 or 30', the model would probably take an additional 30s, as the climb slows significantly after 20'.

But you are probably right that in such a low site, more flare will help. The prop I used appears to flare a good amount, but perhaps not enough.

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 ....


--- In Indoor_Construction_at_yahoogroups.com, "joshuawfinn" <jwfinn@...> wrote:
>
> Kang,
>
> How much does your prop flare? Back when I was flying no-touch LPP, it was taking at least 90 seconds to reach the ceiling (when I actually did reach it) and usually closer to 2 minutes. A heavily flaring prop really flattens out the climb.
>
> -Joshua
>
> --- In Indoor_Construction_at_yahoogroups.com, "Yuan Kang Lee" <ykleetx@> wrote:
> >
> > We had our club contest this morning. Boy, that is a difficult place to fly. Vents, wires, and lights all hang at around 19 to 20', and these things crowd the ceiling, which is may be 21'.
> >
> > John Alling won with a very impressive 5:59. I came in second with a 5:44. There were 6 fliers. I'll post the full results when I get them.
> >
> > To fly 6 minutes, you need to do light banging and hope for the best. I was conservative in my earlier flights. I backed off a lot and the climb to 20' was 1 minute. The best I could do flying conservatively was 5:20. I tried three motor sizes: 1.8g later shortened to 1.6g and 1.1g. The best turned out to be 1.6g (around 13"). In later flights, I backed off less, and the climb to the ceiling was only 30 seconds.
> >
> > John Alling flew a Cezar Banks LPP. He used a .085" 1.6g motor.
> >
> > -Kang
> >
> >
> >
> > --- In Indoor_Construction_at_yahoogroups.com, "Yuan Kang Lee" <ykleetx@> wrote:
> > >
> > > The 16:14 is the famous flight by Warren Williams, done at Luther Burbank Middle School.
> > >
> > > I have it on my list of things-to-do to visit Mr. Williams and ask him how he did it. I've heard multiple re-telling of the flight, but I'm waiting to hear from the man himself.
> > >
> > > Don Deloach owns the Senior record at 9:56. He has told me that it was scrubbing.
> > >
> > > I understand that at the EAA contest, the LPPs were flying at about 43' and not scrubbing. Leo won with 9:19.
> > >
> > > I don't know exactly how to extrapolate these data points to 22' no touch, but first, I'll ignore the Warren Williams flight. Something like that ain't going to happen.
> > >
> > > From Leo's flight, I'm thinking that 6:30 would be a really good no touch 22' flight. We will see.
> > >
> > > Will let you all know how we do.
> > >
> > > -Kang
> > >
> > >
> > > --- In Indoor_Construction_at_yahoogroups.com, "John Kagan" <john_kagan@> wrote:
> > > >
> > > > --- In Indoor_Construction_at_yahoogroups.com, "calgoddard" <calgoddard@> wrote:
> > > > >
> > > > >
> > > > >
> > > > > Kang:
> > > > >
> > > > > The AMA records for LPP for Cat. I ceiling height are:
> > > > >
> > > > > Junior 7:43
> > > > > Senior 9:56
> > > > > Open 16:14
> > > > >
> > > > > I am not sure what "open" means. I can't see how some other class of person could do six minutes better than the best senior.
> > > > >
> > > >
> > > > Hi Carl,
> > > >
> > > > In AMA (United States model aviation governing body) age divisions, Senior is something like 16-18. Open is the equivelant of the FAI "Senior". It gets confusing.
> > > >
> > > > 16:14 was a once-in-a-lifetime Cat I flight. That kind of time rarely happens under Cat III!
> > > >
> > > > I'd think that 8-10 minutes would be a great no-touch LPP Cat I time, but I'm just guessing.
> > > >
> > >
> >
>
Received on Mon Jun 06 2011 - 11:32:11 CEST