My method for fitting the H assy. in the fuselage was as follows:
Attach the top ply brackets to the vertical members so that they stop short
of the fuselage top surface by 2 or 3 mm.
Remove the top and plop in a jollop of Redux and flox on the top of the
bracket pair.
Pop on the top and go for a beer.
When the Redux has cured, climb in, undo the bolts attaching the top ply
brackets to the verticals and remove the top. You now have the top bit in
exactly the right place.
Dress back any squidged Redux and lay up a few plies over the top of the
brackets to secure them to the top, as per instructions.
Have another beer
Dave Simpson
----- Original Message -----
From: Bob Harrison <ptag.dev@ukonline.co.uk>
<europa@avnet.co.uk>
Subject: RE: Tailplane mass balance stops
> Hi! Steve.
> I don't profess to be an authority but my balance weight stops just less
> than 1" from the tail plane push tube.(I too had to throw away the silly
> original stop then put in a much smaller diameter one lower down!)
> Then on the up stroke the weight now stops about 3/8" before the top of
the
> fuselage where it hits a bed of silicone sealant.(I can't actually see it
> but can feel the dimension with my fingers.)All this was achieved after
the
> factory decided on final inspection that I needed 13 degrees (one degree
> more than in the manual) which meant a trip down the inside of the tail to
> "wear" out,with it falling in my eyes, about 3/4" of nicely shaped 3/4"
> thick plywood put there as a stop. At that end of the movemnet one degree
> on the tail plane converted to about 3/4" of balance weight movement.!
> I guess I can claim to have the "tee" shirt as well on this one.
> However Graham Singleton has published an interesting method of installing
> the 'H' balance weight guides prior to fitting the fuselage top. Have you
> seen it? May save you some hassle if it's not too late!
> Regards
> Bob H G-PTAG
>
> -----Original Message-----
> From: owner-europa@post.aviators.net
> Subject: Tailplane mass balance stops
>
>
> I'm up to another case of looking for someone who has been in a similar
> "been there done that" situation. I am in the process of putting in the
> bulkhead and stops for the tail plane mass balance. During the first
> iteration, (setup as described in the manual), things did not pan out as
> expected (typical). The end result was that the aircraft nose down travel
> (balance up) exceeded limits of bulkheads.
>
> The second iteration involved getting rid of the big fat wooden dowel and
> rubber hose stop (1.5" dia) and replacing them with a UHMW type material
> stop around the cross bolt with a dia of .5" to get the mass weight down
> lower to start with. At this point the weight stops about 1.2" above the
> tailplane push tube in its lowered position. The end result was that it
> looked close, though the next step was to get technical and actually lay
the
> top of the aircraft on the whole mess before continuing.
>
> With the top on, the weight smacks the top of the fuselage being a little
> over a degree short of the minimum amount required of nose down travel.
> Granted only 5 degrees is called for but I am short over 20%. I see my
> direction now as doing some creative machining of the steel weights when
it
> comes time for metal removal and balancing to get clearances. Or to do
some
> beefing up of the lower stop to allow the weight to get even closer to
the
> tube at its bottom travel.
>
> Any "out of the box" insights would be much appreciated.
>
> Steve Hagar
> A143
> Mesa, AZ
>
> --- Steve Hagar
> --- hagargs@earthlink.net
>
>
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>
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