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737eng... could you provide more information on how to take the BAC Training Class? Thanks.

Does anyone have specifics regarding the use of machine tools (Timesavers, etc) for deburring alclad aluminum flat patterns? Industry standards? Mil standards?

Yes, definitely. And the course Flabel offers is excellent as well. If you get a Peery then the general consensus (on the web plus from our company structures DER) is to make sure to get a 1st edition (1950).

Peery (as mentioned) and Flabel's Practical Stress Analysis.

Thanks for the tip but I have the book, just not the answer key. In fact, I would be happy with answers for just the odd (or even) problems like many textbooks have in their appendix.

Ok I'll agree there...but back to the original question... anybody happen to have an answer key or know where I can find one? Thanks folks.

Probably. They never teach this stuff anymore anyway, right? Hand calcs, what are those? Are those what you have to do to drop in your FEM nodes? :) <tongue firmly in cheek, no FEM wars please>

Do any of you know if there was an answer key published for the first edition Peery Aircraft Structures (1950)? Is this book still used in coursework at US universities? Is the answer key available? I'm not a student and am going through Peery's book for a personal education to supplement...

As a "poor mans wind tunnel" how useful are scale R/C models for designing a full size aircraft? The reynold's numbers are much lower so what can they tell you? You normally can't exactly fly them at super high airspeeds to bring the RN up to an equivalent value. How about for stability...

Thank you for your reply and information. Wouldn't this be too conservative and result in the bushings being very bearing limited in many instances? Just for comparison with a material that I do have numbers on (Mil-H-5)... Copper Beryllium Per AMS 4651 has tensile vs bearing values of 180...

Can anyone point me to a reliable source for bearing properties for nickel aluminum bronze (QQ-C-465, Alloy 642, Mil-B-6946, or AMS 4640) as used in NAS (76,77,537,538) bushings? I have a rule of thumb for these numbers but no firm documentation. Thanks. Joa

Good stuff guys, thanks. I'll check out the polygons and also investigate a removable keyway. Yes, a nose gear. Thanks again. Joa

We're in a raging debate regarding the "best" way to clock a steering collar on a shaft (for a gear assy). The collar slides up and down as the shaft rotates. The argument being which is better- more small contact points (such as a spline) or simpler geometry such as a flat on a cylinder...

Can't seem to find any formulas or graphs for the amount of torsion a shaft (with a flat) can transmit though a d-shaped hole. Any suggestions? Joa