Re: Phil Hartmann Indoor Design

From: Yuan Kang Lee <ykleetx_at_gmail.com>
Date: Sun, 27 Jan 2013 19:18:16 -0000

Hi, Tom,

Glad to see that you're getting more active in indoor flying. The models look great.

If I were to dye an F1D, what would be a good color? Blue, Orange?

--- In Indoor_Construction_at_yahoogroups.com, Tom Juell wrote:
>
> A week ago last Thursday I got a Little Zephyr kit from Dave Acton. It
> was designed by Phil Hartmann in 1983. It made two Little Zephyrs.
> They are a 12" span, 15" length indoor model suitable for flying in an
> auditorium or gymnasium. I finished them up by last Tuesday night so I
> could go with Dave to Teaneck, NJ last Wednesday and fly them. There
> was a 1/32 ply rib pattern in the kit that helped speed up the build.
> Red tissue was include but I covered one with dyed condenser tissue and
> the other with dyed 1/4 mil Mylar. I didn't have any dyed OS film but
> will use that on a later Little Zephyr.
>
> The condenser tissue model weighed 3.00 gm and the 1/4 mil Mylar one was
> 2.26 gm without rubber. Right off the building board they both flew in
> excess of 2 min. With a little work they were both flying 3' 45" before
> we left. These models use flat prop blades mounted at 45° to make a
> 7-1/4 inch prop. My launch technique and the model handling of the
> initial torque both need work but I think next Wednesday they will both
> likely pass the 4 minute mark. Phil Hartmann designed great flying
> models. I fly his Blue Ridge Square Eagle outdoors and it is partially
> covered with dyed 1/4 mil Mylar. It flies great and will handle quite a
> brisk wind.
>
> Dyeing condenser tissue, 1/4 mill Mylar or OS film is a bit time
> consuming but really makes a model look good. I have attached a few
> photos of the Little Zephyrs and my first try at building a ministick.
> One of the ministicks weights .55 gm the other .65 gm without rubber.
> The last photo shows the comparison of the densities of color between
> the condenser tissue, 1/4 mil Mylar and the OS film. The stabilizer at
> the bottom of the photos is off the Square Eagle P30, covered in iDye
> Poly Yellow and Aljo Mfg. Co. Neon Orange Poly dye.
>
> I think Dave Acton may bring the Little Zephyr kit back into production
> so you may be able to build and fly one in the not to distant future.
>
> Tom Juell
> New York City
> --
>
> You can make yourself happy or miserable -it's the same amount of effort.
>
Received on Sun Jan 27 2013 - 11:18:20 CET