Re: Building my first F1D

From: Mark <f1diddler_at_yahoo.com>
Date: Sat, 20 Oct 2007 16:18:32 -0000

--- In Indoor_Construction_at_yahoogroups.com, "Lee Dammann"
<ldamnann_at_...> wrote:
d Recommended John Kagans plan as it
> has lots of componant weights. (wish it had defelctions ala HS EZB)
>

IMO, deflection tests are a requirement for ezb parts due to no boron
allowed and (lesser extent) no minimum weight. F1ds allow boron of
course, and have a healthy minimum weight, therefore you can get away
with merely good, not superior wood, at least on (boroned) wing
spars, motorstick, boom. Even so, it's useful to deflect and record
more as a way to educate one's feel about what's "good enough" or
not, next time. I think most F1d flyers do defection test prop
spars, especially non boroned. But even there(IMO) the lower limit
seems more an issue of durability than flight loads. IOW, I've gone
way below published weights on (VP) prop spars, and they seem to fly
as well, just don't last as long, repairs, etc.

With your ezb experience, it's only natural that you bring
the "superior strength/weight" paradigm, but for beginning F1d, I
suggest you adjust that to a simpler "target weight" paradigm. For
first F1d, building 5-10% overweight should help get you in the air.
And that's 5-10% overweight on EACH part, NOT a wing that's .47g, but
model that's 1.3g for example. (I have seen this.)

<<.059g>> That would be one wing spar.

Mark F1diddler
Received on Sat Oct 20 2007 - 09:18:36 CEST