REFLECTOR: Fiberglass stiffness

[Brian Michalk]

The instructions seemed kind of strange to me as well.

make shim, flox on an AL plate.
Take trim actuator bracket, match drill through it and AL hardpoint.
Tap AL hardpoint, ream out bracket.
Attach bracket to hardpoint with 10-32 screws.

Why would it need to be removeable?  The actuator is attached with a -4
bolt.

Al Gietzen wrote:
> Brian;
>
> I've always ordered the "Rutan Bidirectional" from AS; part # RA7725 for the
> coarse BID.  I'm quite certain that is what came with the kit.
>
> I don't recall the need for an aluminum hardpoint, quite sure I just used
> sheet metal screws into the wood shim glassed on with the BID plys.  With
> the hard point well it would seem the plys may be redundant, but add a
> safety factor.  You'll have to be the judge.  The loads are modest.
>
> Al
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
> Behalf Of Brian Michalk
> Sent: Monday, August 18, 2008 7:25 AM
> To: Velocity Aircraft Owners and Builders list
> Subject: REFLECTOR: Fiberglass stiffness
>
> Yesterday we attempted to do some work with the canard trim hardpoints
> where the actuator mounts.
>
> The fiberglass we bought from somewhere was coarse BID, but we could not
> convince it to lay down over the corners.  I compared it to some fine
> bid, and it's much stiffer than the fine BID.  The BID that came with
> the kit was nice and floppy, so it would have made the corners just fine.
>
> How would I know what to order?  As far as I know, one orders by the
> weave (fine, coarse, etc.), and the cloth weight.  I haven't seen
> anything for the stiffness of the cloth which would directly affect
> workability.
>
> We gave up, and left the wood shim and AL hardpoint to cure as is.  We
> used flox for our adhesive.  Do we really need to cover a wood shim with
> 2x bid as called for in the manual? 
>
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