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« Last post by Shay King on January 29, 2026, 06:53:31 AM »
Just started laying out the rudder. There seems to be a discrepancy in the dimensions circled in red.
Also, the dimension circled in blue looks like 21 1/4” but that doesn’t work, 27 1/4” maybe?
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« Last post by Kamcoman77 on January 28, 2026, 08:32:52 PM »
I made a scarfing jig and tried a router as my 1st choice. Either the bit wasn't sharp enough or the router speed was too slow, but the thin plywood edge at the end was torn quite a bit. I added a steel strip at the end of the jig and switched to a belt sander. Worked great. If the router works for you, it will be a lot faster. I just wasn't happy with my test scarf using my router.
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« Last post by Brock on January 28, 2026, 07:55:17 PM »
Glued up the second front spar today. Just like Isotopes, I had to add a bit (1/8th inch) to my filler block.
Tomorrow I am going to try out the scarfing sled which was setup, today, with a Hitachi router. This Scarfing will be a first for me. Hope to scarf all four spar webs in one go. There is a lot of surface area in common between the spar-caps and spar-web. I'm begining to think it might be better to glue it with TitebondIII instead of T-88.
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« Last post by Kamcoman77 on January 28, 2026, 01:27:59 PM »
You can always cut that 3/4" off and go with the 7/8"
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« Last post by Shay King on January 28, 2026, 01:51:58 AM »
I’m sorry now that I didn’t pay more attention to that little note: ‘7/8” optional’.
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« Last post by Kamcoman77 on January 27, 2026, 05:07:36 PM »
Pappy, that's a very good tip on the lightweight tailwheel and the 7/8" tailpost. Your modification of the original design is very nice!
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« Last post by pappyadkins on January 27, 2026, 04:40:15 PM »
Also note, if you do the 7/8 tail post, you can use the 'upgraded' super lightweight tailwheel... 
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« Last post by Kamcoman77 on January 27, 2026, 01:45:51 PM »
Great question. I'm not sure how I would try to add the 7/8" piece. From Leonard's drawings it looks like he cut the 3/4" post off level with the upper longeron and scarfed the 7/8" piece over part of it. FYI 7/8" x 0.058" tubing is a perfect fit for the 3/4" vertical stab spar. I discovered the 0.058" wall stuff earlier and just made my tailpost from 7/8" x 0.058". My vertical stab is a slip fit into my tailpost. I had some 3/4" x 0.49" 4130 on hand so that is why my upper rear longeron is not to plans spec.
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« Last post by Shay King on January 27, 2026, 12:22:57 PM »
Hey guys, I’ve got the 3/4” tailpost welded into my fuselage. Only now that I’m making the vertical stabilizer do I realise that 7/8” would have been simpler.
I’ll have to add on that 7/8” piece shown on page 25.
Am I right in thinking that I’ll have to cut the top 2” of the 3/4” tailpost off and then weld on the 7/8” piece?
Picture below..
Thanks for all the help so far.
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As far as I know, in large batches it needs to be weighed.
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