If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#71
|
|||
|
|||
Jay Honeck wrote:
Well, to my (admittedly un-trained) eye, there doesn't appear to be enough "there" there... Each 10,000# engine on the B-707 was attached with three (3) bolts the size of your small finger! Never lost one. At OSH several of us were examining "Aluminum Overcast" (the EAA B-17 that is being re-built after a landing gear collapse), and we all shuddered after looking at the engine-less nacelles and noting that those huge radial engines were attached to the firewall with what appeared to be bicycle parts... In fact, the bolt holding my rear sprocket on my bicycle is BIGGER than the bolts holding the motor mounts to the nacelle! :-) Jay, Jay, Jay ... don't confuse size with strength. :-) Matt |
#72
|
|||
|
|||
Jose wrote:
Well, to my (admittedly un-trained) eye, there doesn't appear to be enough "there" there... In all fairness, the struts don't have to support the whole load of the wing. There is also some strength in the wing spar itself. Really? Most Cessnas I've seen don't have any way to develop any significant moment about the wing attack points, so the struts DO have to support the whole load of the wing. The spar is there simply to transfer the air loads to the strut and wing attach points (compression generally, or tension if pulling negative G. Matt |
#73
|
|||
|
|||
Jose wrote:
I'm guessing there were used in double shear Whazzat? Jose It is when a bolt has two shear planes, which means the bolt passes through three pieces of metal, with one being on either side of a middle member. Hard to draw in ASCII, but I'll try: X's represent the metal being fastened, O's represent the bolt Single shear: O XXXXXXOXX XXOXXXXXXX O Double shear: O XXXXXXOXX XXOXXXXXXX XXXXXXOXX O You can probably Google "double shear" and find much better diagrams and explanations. Matt |
#74
|
|||
|
|||
Jose wrote: In all fairness, the struts don't have to support the whole load of the wing. There is also some strength in the wing spar itself. Not like you'd think. Pull the strut out from under a Cessna and the wing falls to the ground faster than you can get out from under it. Hmmm. Good to know. I always thought the strut was more for when the wing is supporting the aircraft. Is the support set up so that if the bolts fail on the ground, the wing will fall, or is there a little notch that would hold it in place. The wingtip will go right to the ground. There are two bolts that hold the wing to the fuselage, and they really aren't all the big. These two attach points are basically like a door hinge, their strength is fore and aft, not up and down. The strut handles the up and down part. |
#75
|
|||
|
|||
Newps wrote:
These two attach points are basically like a door hinge, their strength is fore and aft, Tension and compression? not up and down. The strut handles the up and down part. Shear? |
#76
|
|||
|
|||
On Sun, 14 Aug 2005 17:45:36 -0600, Newps wrote:
Jose wrote: Well, to my (admittedly un-trained) eye, there doesn't appear to be enough "there" there... In all fairness, the struts don't have to support the whole load of the wing. There is also some strength in the wing spar itself. Not like you'd think. Pull the strut out from under a Cessna and the wing falls to the ground faster than you can get out from under it. I'll never pre-flight a 210 again. Thanks for the info. Mike Weller |
#77
|
|||
|
|||
On Fri, 12 Aug 2005 17:15:42 GMT, "Mortimer Schnerd, RN"
wrote: wrote: Bryan, can't you learn those maneuvers without getting a commercial ticket? Of course you can but why bother? The maneuvers are and of themselves are pretty useless. You might as well get credit for learning them. One of the best things about flying is that you never stop learning. I mean that in the kindest way. Mike Weller |
#78
|
|||
|
|||
Jay Honeck wrote:
rambunctious thing we ever do are "Up-Downs" (as the kids call them), which is a firm pull up with a steady push-over at the top that induces negative Gs in the back seat. As others have sait: If there's no dirt floating around, you don't even hit zero G, let alone negatives. I think you should go and take some real acro lessons. (Actually, I think every pilot should!) It's fun and it definitely makes you a better pilot. And you'll learn something about the flight envelope. If I recollect correctly, your average spam can is certified for something like +5.3 and -2.5 G at Va. Ask your acro instructor to demonstrate those loads. You'll be surprized! (Not sure whether you'll like it.) Stefan |
#79
|
|||
|
|||
john smith wrote:
Newps wrote: These two attach points are basically like a door hinge, their strength is fore and aft, Tension and compression? not up and down. The strut handles the up and down part. Shear? Just the opposite. The wing attach bolts are loaded in shear and the strut in tension (primarily) or compression (negative G). Matt |
#80
|
|||
|
|||
Mike Weller wrote:
On Sun, 14 Aug 2005 17:45:36 -0600, Newps wrote: Jose wrote: Well, to my (admittedly un-trained) eye, there doesn't appear to be enough "there" there... In all fairness, the struts don't have to support the whole load of the wing. There is also some strength in the wing spar itself. Not like you'd think. Pull the strut out from under a Cessna and the wing falls to the ground faster than you can get out from under it. I'll never pre-flight a 210 again. Thanks for the info. I've never read the preflight checklist for a 210, but the 150-182 series doesn't include removing the wing strut as a preflight checklist item! :-) Matt |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
rec.aviation.aerobatics FAQ | Dr. Guenther Eichhorn | Aerobatics | 0 | August 1st 05 08:31 AM |
rec.aviation.aerobatics FAQ | Dr. Guenther Eichhorn | Aerobatics | 0 | January 1st 05 07:29 AM |
rec.aviation.aerobatics FAQ | Dr. Guenther Eichhorn | Aerobatics | 0 | September 1st 04 07:27 AM |
rec.aviation.aerobatics FAQ | Dr. Guenther Eichhorn | Aerobatics | 0 | February 1st 04 07:27 AM |
rec.aviation.aerobatics FAQ | Dr. Guenther Eichhorn | Aerobatics | 0 | January 1st 04 06:27 AM |