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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...

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...

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

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...

My understanding was that the ride was primarily intended to be a check on the pilots instruction/ instructors....

15 watts maximum output power......

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

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...

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...

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...

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


Geoffry DeHavilland: You must simplicate and add lightness....

Makes me more appreciative of the rear spar beef up kit I installed.....

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.)

...

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...

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...

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...

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,...

Nothing beats sitting around a campfire and listening to tall tales......

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....

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...

It’s starting to look like stocking up on colloidal silver and a nebulizer might be a good idea.......

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

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...

Not in trail, or not making much difference?

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...