My post are going to be fewer & fewer, as I start to go off book with the project.
Good Day follow BH builders, I read everything I could find on internal corrosion protection of 4030 tubing. It is encouraged in AC43 to use boiled Linseed Oil. After a review of the ALL the products I could find including long term engine preservation oils. IMHO, In the case of 4130 tubing. Linseed is still the best choice at $10 a liter. I plan to inject any part that I can with it. Bell cranks got a few drops & then I sealed the hole with weld. It does not take much oil. The oil naturally spreads and crawls its way around everything. I simply tested it by dipping some linseed oil on the fab table. Within a day it spread like a fugus over the table. I see why the old generation chose to use it. Anyways.. I can ramble on about details. After fabricating these tiny little bell cranks, I realized that these little parts are fairly challenging to fab & weld. Needing something to take pictures of & post, I included pictures of a simple jig I designed to get the job done quickly & accurately. Be sure to use backers in all the bushings during welding. The backers are not just heat sinks! There purpose is to simply take up the space so air has a more difficult time getting into contact with the interior surface of the bushings during welding. Alrighty time to get back to work. PM's are open for anyone who requires a more detailed explanation of my ramblings. Cheers ta all
Oh almost forgot, this is actually beneficial information if you read my ramblings about BH. In the attached photo DWG 11B. There is a measurement circled in RED! At 1st glance a fabulous BH fabricating warrior may see 3"7/16 When in the real BH fabricating world this measurement is 3"1/16. Pay Attention! It freaking matters! Thank me later![]()
With a close inspection you may be able to pick out some mods. Starting the upper frame today & Looking forward to the end of March.
I'm not able to pick up your modifications, but am curious what they are.