Search:

Type: Posts; User: fobjob

Page 1 of 20 1 2 3 4

Search: Search took 0.21 seconds.

  1. Thread: Fuselage advice

    by fobjob
    Replies
    23
    Views
    2,090

    Yep, but that introduces fit problems.... ...

    Yep, but that introduces fit problems....

    Actually, tensile/ yield point depends on cross sectional area of the steel itself, so it can go either way between diameter or wall thickness. Bending...
  2. Thread: Fuselage advice

    by fobjob
    Replies
    23
    Views
    2,090

    Simplicate and add lightness...Geoffrey...

    Simplicate and add lightness...Geoffrey DeHaviland
    Although, by starting out too heavy, you could probably avoid a weight spiral, and maybe even run one negative...8)

    Although, if I was...
  3. Thread: Weld Quality

    by fobjob
    Replies
    83
    Views
    6,536

    I am assuming you mean “pre heating” when you say...

    I am assuming you mean “pre heating” when you say “heat treating”....??
  4. Thread: Weld Quality

    by fobjob
    Replies
    83
    Views
    6,536

    Back in the day, (the 1970’s)(sheesh...) when I...

    Back in the day, (the 1970’s)(sheesh...) when I started teaching myself how to weld airframes, TIG was illegal to use on airframes, (or so I thought, anyway...I’ve been unable to locate any printed...
  5. Thread: 709 Rides?

    by fobjob
    Replies
    17
    Views
    2,154

    My understanding was that the ride was primarily...

    My understanding was that the ride was primarily intended to be a check on the pilots instruction/ instructors....
  6. Replies
    11
    Views
    806

    15 watts maximum output power......

    15 watts maximum output power......
  7. Replies
    121
    Views
    13,986

    There’s one for a PA-12, also........

    There’s one for a PA-12, also..... http://www.fadodge.com/pa-18-lift-strut-reinforcment-bracket/
  8. Replies
    121
    Views
    13,986

    What bothered me about that was that you couldn’t...

    What bothered me about that was that you couldn’t use the double shear numbers for a 5/16 bolt with that thin steel bracket that attached the strut to the wing, as a tear-out could not be accurately...
  9. Replies
    121
    Views
    13,986

    It would be interesting to know what G force was...

    It would be interesting to know what G force was applied at failure point. I approximated a calculation of 9.5 g’s for the 1750 version, but there were un- calculatable factors involved , which is...
  10. Replies
    5
    Views
    1,302

    Since they decoded the four magnetic cycles of...

    Since they decoded the four magnetic cycles of the sun, next year will have the same cold/growing season as this one, the next year will be like last year, and gradual improvement for the next five...
  11. Replies
    121
    Views
    13,986

    I think he’s hit the point where it’s not really...

    I think he’s hit the point where it’s not really a cub anymore.....


    Geoffry DeHavilland: You must simplicate and add lightness....
  12. Replies
    121
    Views
    13,986

    Makes me more appreciative of the rear spar beef...

    Makes me more appreciative of the rear spar beef up kit I installed.....
  13. Replies
    121
    Views
    13,986

    Original builder cut large lightening holes in...

    Original builder cut large lightening holes in both spars. Rear spar failed at strut attach point during extreme turbulence from Sawtooths just north of Stanley. (holes visible in P’s video.)

    ...
  14. Replies
    13
    Views
    2,004

    I have heard that people with 180hp cubs look...

    I have heard that people with 180hp cubs look back and are alarmed at the tail shake in the wind stream....true??

    I presume that the Charlie Center stab leading edge strut mounted to the jack...
  15. Replies
    14
    Views
    1,602

    As I understand it, radial engines under high...

    As I understand it, radial engines under high boost at high altitudes suffered greatly from carbon valve deposits , the B29 certainly, and the B36 as well. The B36 also had a design flaw in its...
  16. Replies
    24
    Views
    2,211

    I used to have a hanger full of black widows...

    I used to have a hanger full of black widows every fall except for this last year. What I did the fall before made the difference. Instead of only killing the spiders with wd40 spray when I found...
  17. Replies
    6
    Views
    1,097

    While listening for sounds of structural failure...

    While listening for sounds of structural failure in my house( beefed up with foam in the walls and foundation/frame anchors in recent years) and sounds of things falling off shelves, none of which,...
  18. Nothing beats sitting around a campfire and...

    Nothing beats sitting around a campfire and listening to tall tales......
  19. Replies
    101
    Views
    10,756

    When I say “positive lift” I am referring to...

    When I say “positive lift” I am referring to upwards force....if nobody knows the difference between positive and negative, this could explain the confusion in this thread....
  20. Replies
    101
    Views
    10,756

    I’m concerned that the focus of this thread seems...

    I’m concerned that the focus of this thread seems to be how to get even more positive lift on the stab instead of finding out WHY the tail has positive lift on it at all........when it shouldn’t have...
  21. Replies
    26
    Views
    3,410

    It’s starting to look like stocking up on...

    It’s starting to look like stocking up on colloidal silver and a nebulizer might be a good idea.......
  22. Replies
    101
    Views
    10,756

    #68. It didn’t matter much on mine.....

    #68. It didn’t matter much on mine.....
  23. Replies
    101
    Views
    10,756

    Now my head is starting to hurt again...when you...

    Now my head is starting to hurt again...when you trim nose down, it raises the leading edge of the stab, which loosens the bungee cord, which deflects the elevator down, in order to keep it at the...
  24. Replies
    101
    Views
    10,756

    Not in trail, or not making much difference?

    Not in trail, or not making much difference?
  25. Replies
    101
    Views
    10,756

    The bungee cord is supposed to keep it exactly in...

    The bungee cord is supposed to keep it exactly in trail, but in truth, it doesn’t seem to matter much. My bungee cord was way too long (how the heck did that happen?) when I got it, but when I...
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4