Re: F1M / Pennyplane course time allocation?

From: <mkirda_at_sbcglobal.net>
Date: Thu, 13 Jun 2013 15:20:18 -0000

Hi Tapio.

I'd do it out of balsa for F1M as you have weight to play with.
It is also quite stiff with the carbon and can be easily manufactured.

As a newbie last year, I could not wrap my head around any of the VP mechanisms I saw pics of. It wasn't until I met John and Brett at EAA and Brett handed me one of his props to play with that I got it.
Having a course like you are doing would have been a godsend to get up to speed quickly.

Regards.
Mike Kirda



--- In Indoor_Construction_at_yahoogroups.com, Tapio Linkosalo <tapio.linkosalo@...> wrote:
>
> On Wed, Jun 12, 2013 at 11:44 PM, mkirda_at_... <mkirda@...
> > wrote:
>
> > **
> >
> >
> > Out of curiosity, do you have a hub design in mind already? Are you
> > thinking of providing some of the parts prefabricated?
> >
> > I would think that handing someone a shaft with the carbon torque bar
> > already glued on would help immensely in terms of time. You can show how to
> > fabricate the part as part of the instruction. Likewise if you for example
> > use the carbon tube you could provide it pre-drilled for the hypo - while
> > showing how to drill it. Same for the screw holder. To do all of these
> > parts from scratch might take the better part of a weekend.
> >
> >
> Thanks Mike, good points there.
>
> I have not fixed the details of the hub yet, but I think I'll lean towards
> something along the lines on Bill Gowans hub for dummies. I think that the
> aim of the course would be to push the participant to a level where they
> can construct the next VP on their own, the first one would hardly break
> the bank and be immediate winner, so it is important that the hub will not
> be one-off, but they get the knack of construction. Once they have mastered
> the basic construction, they can then start develop fancier structures on
> there own.
>
> Therefore standard carbon cross bar, but next to that mostly balsa
> construction. I might laminate the adjustment screw holder along the lines
> of Treger, and just show pictures how it can be done of balsa also. The big
> question is the hinges, I have tried kevlar thread but cannot make it work
> even myself; tubes and wires tend to be heavy. Might even consider tissue
> or monokote. Also I have not decided whether to go with tissue tubes or
> just balsa studs for the blade spar roots. But definitely I'll stay out of
> carbon tube construction, that would require lots of Dremeling, and I do
> not think that is a good way to start with.
>
>
>
>
> -Tapio-
>
Received on Thu Jun 13 2013 - 08:20:19 CEST