RE: Re: F1M Design [1 Attachment]

From: James Alderson <aldershine_at_hotmail.com>
Date: Sun, 21 Apr 2013 00:04:36 -0600

Thanks for the great info! I will put it all to good use. Not sure I understand what you meant about the motor tube and tail boom lengths. What is the overall length of your model?

Thanks for your input. It is much appreciated!

James Alderson

> To: Indoor_Construction_at_yahoogroups.com
> From: tapio.linkosalo_at_iki.fi
> Date: Sun, 21 Apr 2013 06:47:12 +0300
> Subject: Re: [Indoor_Construction] Re: F1M Design [1 Attachment]
>
>
> My current design is practically the same model which I have flown since
> 2004 (when I visited USIC and West Baden). All balsa construction, with
> the exception that the latest model has slightly thinner balsa for motor
> tube and required some boron to prevent _sideways_ buckling, a rigging
> line to the aft wing support was enough to stiffen the tube that way.
> Both motor tube and tailboom are 380mm long (a bit over 9"); I have
> found this dimension good. The long motor tube is under some strain,
> especially as my motors are shorter than the tube, but with the motor
> contributing to 1/3 of total weight, that helps to pull the CG aft. I'm
> currently flying with 120% CG.
>
> The wing and tail are indeed solid balsa, no boron nor carbon. The
> fuselage splits in two alond the standard F1D practice, that helps to
> pack the model into a compact box.
>
> I have practically always used built-up props for F1M, and am happy with
> those. Easier than trying to find the super-duper balsa needed for solid
> blades, and seem to work OK. Talking of balsa, short of the motor tube
> and tailboom wood for my latest model, I only build M's from hobbyshop
> balsa. If you get some good, light and stiff 3mm (1/8") wood and cut to
> shape, you get good enough material for F1M. For the 2004 model I even
> sanded the fuselage wood down from hobbyshop material, but those parts
> show some weaker spots, it is much easier to get some decent fuselage
> wood from people who cut indoor wood.
>
>
>
> -Tapio-
>
>
> ------------------------------------
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Received on Sat Apr 20 2013 - 23:04:37 CEST