[NSRCA-discussion] Genesis revisited

[Verne Koester]

On second thought, I probably didn't have any photos with those old
articles. Here's one with my old Partner fuse sitting on the sub table. You
can clearly see the casters for adjusting the angle of the table. The fuse
was just being temporarily held in place with clay when this was taken,
however, that's about the size of epoxy blobs I use when I start the
alignment process.

Verne

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Gayer
Sent: Sunday, April 11, 2010 12:09 AM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Genesis revisited

Verne,

Thanks for the good suggestions. I will set up to reference off the fin 
centerline.
Although we cut the holes  for the wing and stab tubes, no reinforcing 
has been done, no epoxy used- so modifications will be easy. Probably 
have to shim the gear slightly to get the plane to sit level. Sounds a 
lot easier and much more likely to work than trying to straighten the tail.
What are you using for a reference to establish stab incidence = 0 and 
check the downthrust of the nose ring if you are not trusting any marks 
on the fuselage?

Thanks again,

John

Verne Koester wrote:
> John,
> You may be far better off in the long run cutting out the wing and stab
tube
> sockets. Then jig up the fuse so the fin is straight up and down (90
degrees
> to your table). At that point, you just need to glue the new sockets in so
> the tubes are parallel to the table. I realize I'm over-simplifying the
> process, but I think it would give you the best chance for long term
> success. If you don't ruin the fin by bending it with a heat gun, it will
> almost certainly end up where it started after being out in the sun for
> awhile. BTW, I never trust alignment marks molded into a fuse. My first
> alignment steps are to make the fin perpendicular to my table and check
out
> the down thrust molded into the nose ring at the same time. Once those are
> set, I make my own marks (referenced off my table) as close to the
molded-in
> marks as possible. When you consider that two fuse halves are joined in
the
> center, even a few thousands shift somewhere can equate to things being
way
> out whack at the wing tips. One of many reasons I prefer kits where the
> builder glues in the sockets rather than the manufacturer.
>
> Hope this helps
>
> Verne Koester
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Gayer
> Sent: Friday, April 09, 2010 10:47 PM
> To: NSRCA Mailing List
> Subject: [NSRCA-discussion] Genesis revisited
>
> I'm helping someone from our club build an old Genesis kit. Everything 
> was going along just fine until it came time to install the wing and 
> stab tubes. The wing tube is just fine, ends up parallel to the belly 
> pan within a millimeter at the ends of the tube running through the 
> fuselage.
>
> The problem occurs at the tail end. The fin is 12 mm out of plumb and 
> the stab tube(using the indicated marking on the fuselage) is tipped 
> about 10 mm in the same direction as the fin. Also the marks on the 
> fuselage for the stab tube and the front pin are not the same distance 
> up from the fuselage bottom so it appears these marks were not 
> accurately set in the mold. Rather a mess.
>
> A long time ago when I ran into the crooked fin problem , I managed to 
> get it lined up by using a heat gun and gentle pressure. Then using 
> braces, tail post and a former, try to lock in the new fin position.
>
> Anyone have any experience with this netbox kit that ran into any of 
> these problems or were all the others perfect right out of the box?
>
> I would really appreciate any guidance on this that I can get.
>
> Thanks
>
> John
>
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