Phamton Flash

From: papadesign1 <papadesign1_at_yahoo.com>
Date: Fri, 03 Nov 2006 17:24:48 -0000

You have given me some things to think about.

I am using the Penn Valley Kit

We are flying in the Oklahoma City Armory with approximatly a 30 foot
ceiling

For the prop we have to use the wood blank included in the kit or if
we wish, we are allowed to carve another prop from a different block
of wood with the same dimensions as the origional blank. I am not
sure if you are familar with these but they already have a twist cut
into them. To be honest I don't know if I have the skill level to
reproduce that.

The prop is 5 1/2 dia
Approximatly 1/2 way across each blade it reaches 45 degrees
I think the pitch as 14.4?
(someone suggested I put as much camber in as possible)

The way I understand the rules, the model must be at least 5 grams
not including the rubber.

On my first attempt at building a Phamton Flash, the plane ended up
being 3.9 grams. So I had to add ballast.

The best my current Flash did was 1 min 30 sec but that was with an
18 in loop of 1/16th rubber, it never did quite get up to the ceiling.
 
Then I put on a 12" loop of .078 rubber
I got it to go 1 min 26 sec and it went up to the ceiling.

When I built it I didn't know about the 12 inch max rubber length so
I put the rear rubber hook as far back as possible at 11.5" do you
think I would get better results with it moved forward perhaps to 9"??

So far it's I have been pretty pleased with my results but its a far
cry from 2 min that some of my competitors are reaching.

Thanks again for your help, I will let you know how I do




 
Received on Fri Nov 03 2006 - 09:33:23 CET