90% to go on an S1T

Discussion in 'Pitts' started by nick1881, Dec 7, 2017.

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  1. Dec 7, 2017 #1

    nick1881

    nick1881

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    Been working slowly trying to knock out this s1T one project at a time. Currently finishing up the brakes, but I’m starting to think about how the fuel system should be done. It has a Gordon price “ultimate” Pitts fuel tank. I’ve seen a couple of guys on here that have the same tank and was wondering if I could get more information on it. To my knowledge it has an internal header tank....anyone have a drawing for this, so I can figure out in my head what the inside of this tank looks like? Here is what it looks like, as well as a drawing of my proposed fuel system...

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    Last edited: Dec 7, 2017
  2. Dec 7, 2017 #2

    EAABipe40FF

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    I know nothing about that tank but the Dusters use a tank with internal header. I'd think you would need two vents, both upright and inverted which are provided in my AD2 tank....

    Also, a servo, at least the Bendix does not have a return. The Duster tanks do have a return inlet for use w/PS5C.
     
  3. Dec 7, 2017 #3

    jrs14855

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    The tank as drawn will vent both compartments via the sight gage. IIRC removal of the tank shown requires removal of the upper wing. I went thru three standard factory tanks in my S1S in 1000 hours.
     
  4. Dec 7, 2017 #4

    Tomcat

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    I have this same tank in my project, it does have an internal header built in which is the compartment your flop tube sits. My tank only has one vent coming out the top forward part of the tank where your showing the return line coming back in. I would think you would want to move your vent as far forward as possible so that when you top it off sitting in the three point atttitude you can maximize tank capacity without it venting out.
     
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  5. Dec 8, 2017 #5

    PowerStroke

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    I know of a S1 that will only hold 15.5 gallons before it starts overflowing from the vent.
     
  6. Dec 8, 2017 #6

    cwilliamrose

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    That being the case they should make the tank smaller and save some weight. :)
     
  7. Dec 8, 2017 #7

    Bond007

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    Your drawing looks correct,just weld in a divider where the tank starts making the V,
    Drill some small hole in the divider
    Danny 007
     
  8. Dec 8, 2017 #8

    nick1881

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    Alright great thanks guys. Looks like im on the right track with a minor tweak here or there. Danny and Tom, how many gallons does this tank hold?
     
    Last edited: Dec 8, 2017
  9. Dec 8, 2017 #9

    Tomcat

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    I believe it's 24 gallons, 23 useable.
     
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  10. Dec 8, 2017 #10

    Bond007

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    I believe that Gordon offered a 23 gal,and a 19 gal tank back in the day
    The prototype I have has the 19,and that's more fuel then my butt can stand on a X country.
    One other thing ,be aware of how your rudder pedals are going to work out,I have a hard time getting my size 12 shoe,in beside that tank
    Danny 007
     
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  11. Dec 8, 2017 #11

    Morphewb

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    Since we're talking about Gordon's stuff does anyone want one of those ''over the top wing'' ferry tanks he used to sell? I have two and will give them away if someone will pay shipping. One's painted, the other in aluminum finish. I never tried one of these either.

    If you want to make your Pitts/Ultimate look like a Tiger Moth give me a call....operators are standing by.....
     
    Last edited: Dec 8, 2017
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  12. Dec 9, 2017 #12

    nick1881

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    If you want to make your Pitts/Ultimate look like a Tiger Moth give me a call....operators are standing by.....[/QUOTE]

    😂😂😂
     
  13. Dec 9, 2017 #13

    Bond007

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    I also have one of those wing tanks,still has fire stop in it
    Danny 007
     
  14. Dec 9, 2017 #14

    race38

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    Ben, PM sent.
     
  15. Dec 9, 2017 #15

    Morphewb

    Morphewb

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    Got it and sent back.
     
  16. Dec 9, 2017 #16

    Knight Twister

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    Free airplane parts, can't beat it.
     
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  17. Dec 9, 2017 #17

    nick1881

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    Ordered and now waiting in parts to come in, so had some extra time. Had a good friend has been welding professionally for 40 years come over and help me setup this Lincoln squarewave 175 that’s in the hanger I’m renting. My dad taught me to gas weld as a kid and I messed around with TIG maybe twice in high school and that was over 10 years ago now, so I was quite excited to get going. My steel welds ended up starting to look OK and my first few attempts at welding aluminum!! So cool

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  18. Dec 9, 2017 #18

    Neil

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    Got the same welding machine at work, just haven't taken the time to get up to speed on aluminum. something I need to do I suppose.
     
    Last edited: Dec 10, 2017
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  19. Feb 11, 2018 #19

    nick1881

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    Ok been out of the country flying for the last several weeks, but back in town for a few days and got out to the hanger for some building. Spent some time today sorting out the elevator push rods and torque tube....

    First picture is of the idler support on the torque tube. The lip that was left on the inside was causing the idler arm to hit before I could achieve full up elevator. Got the die grinder out and problem solved.

    Per usual fix one problem and another comes to light. The idler arm mid fuselage was modified from the plans. The original builder wanted bearings instead of a bolt through a tube. I’m all for that, bearings are better. In doing so he made the arm sit to high and now the elevator push rod tube hits the one fuse diagonal member(picture where my finger is pointing.

    Took the idler arm off and was able to pull the rod end bearing right out (glad I found that out now). My plan is to just shorten it the appropriate amount and put the rod end bearing back in per the plans with a rivet.

    2 questions for you guys. Does anyone see a problem with shortening that idler arm by 3/8”? Second, after I drill a hole through both tube and rod bearing how do I rivet it in place? Plans show a regular rivet, one that you would have to buck. Not a squeeze or pulled rivet?

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    Last edited: Feb 11, 2018
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  20. Feb 11, 2018 #20

    nick1881

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    As for the rivet, I guess you could use one that was long enough to go the whole way through. Plans are just a little vague there. Seem reasonable?
     

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