Old then New

I have no idea if these brake lines were original or now, but they sure were old and brittle. I found a hose shop and had a new set made. Cost wasn’t too bad, about $180 for the 4.

The original hoses had a end that was also used to connect to the frame, but finding that fitting was difficult and if found, costly, so I used an AD832-4D to connect to the frame and the two hoses.

Old hose end in the foreground, and AN832-4D in the background

Another one?

Well, sometimes you come across a deal that you just cant turn down, and N97822 was one of those deals.

I was offered to purchase her from an Aviation foundation after her previous owner had wrecked her on landing by hitting a taxi light. The owner then subsequently passed away so the repairs were never done.

I purchased her and had it shipped from Ark to Tx.

N97822 is a 108-1, and I wanted the project mainly for the Franklin 150 engine. the fuselage was badly damaged because the right main gear hit the runway taxi light and broke almost all the tubes in that area of the fuselage.

I was storing her at a friends grass strip, but recently moved her down to my hangar and began removing the engine.

Now its time to send both this engine, and the original F150 to AirWorx to get overhauled into one good engine!

Soda and patterns

Today, the weather in Dallas was PERFECT, so I got out the Harbor Freight soda blaster and worked on the light surface corrosion inside the vertical stabilizer. Only took about 45 minutes and a lot of dust, but the inside looked great after. Later I took it down to the airport and sprayed the inside with Zinc Chromate Primer (after flushing with water and drying of course).

I also “Dry fit” the OLD cargo floor and front wall to evaluate using aluminum to replace each and the use of Oratex as a side wall covering. I came to the conclusion that I may want to go with the original cargo canvas material, because if I cover the entire cargo area with Oratex, then getting into the aft fuselage may be difficult. I may use a local upholstery company to remake the cargo envelope.

I watched a video on YouTube about using this material used to protect new floors as a great thickness of cardboard to make patterns. Well I gout out my floorboards and made patterns. I plan this week to go to a local meta sales store and see if I can buy aluminum plate that is waste from drop cuts.

Considering everything from diamond plate, to smooth aluminum with anti skid material. Also considering either powder coating or cadmium plating. Stay tuned.

Oratex decision made

Tonight I also made a decision on Oratex. I decided to use the dark navy “Corsair” blue for the exterior and Bright Silver for the interior.

Yes, I plan to use Oratex for all the interior covering, it will be very light and provide more space is it is expressly thin, yet strong. Also easy to install inspection plate and such.

I tried to estimate some rough material needs with some measuring tonight. The material comes in two widths, 42” and 71”. Then you purchase in 1 meter linear lengths.

The 42” wide runs about $68 per liner meter.

Brake lines

Tonight I added some new Brake lines. The old ones looked original and very brittle. The old ones had a funky fitting to go through a bulkhead, but I replaced them with a standard AN832-4D union and nut which works much better and allows for standard fittings on the lines.

Cleveland’s

Slowing working on the Cleveland brakes. Sent off the brake lines to get rebuilt and while they are gone I’m working on the calipers.

I had bead blasted the outsides and cleaned them well, but because the aircraft had sat since 1983, there was residue of the O-ring on the bore of the caliper.

I used some X-50 anti-corrosion spray and a scotchbrite to clean that area up. In the picture below you can just see that ring in the bore of the caliper on the Left and how clean the one of the right is.

Aslo found out Univair sent me the wrong -O-ring for the Piston.

Glamor Shot!

I was out at the hangar tonight, working on Brake master cylinders and the Cleveland calipers. I put the fuselage out of the hangar in the grass so I could have more room to work. Well the Sun set was nice and I thought I would take a Glamour picture.

As she sits here, she has all new control cables installed with all new Pulleys. Also rebuild control column and Dual brake / rudder pedals.

Working on Floorboards and Brake lines now, next will be 1/2″ fuel lines and selector.

Pitted races

Well, this weekend I wanted to get the tailwheel built up and mounted on the airframe so I can roll the darn thing around. Well as I gathered all the pieces together and started a final inspection, I noticed the Scott 3200 wheel bearings were pitted.

Next comes the research to replace them. The Bearings are Timken A4050’s with a race A4138. Looking at the regular places like Univair, Aircraft Spruce and others, these bearings are very costly considering their size. To get the Bearings, races and dust covers is over $270.

If you look up the timken A4050 on its own, you can find the bearing for MUCH less, like $40 for two bearing and race sets!

So now you are asking why? Why are the SAME bearings 1o times more expensive from the Aviation parts houses? Well I found an interesting post on this McFarlane site stating that the Aviation grade of the A4050 actually has a part number A4050-20629.
https://www.mcfarlaneaviation.com/products/product/A4050/

You can see that the A4050-20629 has the FAA/PMA stamp and appears to be a black roller cage.