4M-2500 blueprints

[maagneto]

Hi,

I would like to know if anyone has an idea how I can acquire/access 4M-2500 engine blueprints.

Specifically, I'd like to know the diametral pitches of all gears used in its construction.

Thanks!

[Dave Czirr]

I don't know what archives the U.S. Navy might have but that's certainly one place to start, though it's likely to be a slow process moving thru the machinery of government.

Another idea is you might contact Robert J. Neal, author of "Master Motor Builders" who devotes a detailed chapter to this engine in the book. Mr. Neal does drop in on this forum on occasion but you might do better to contact him thru his publisher:

Aero-Marine History Publishing Company
P.O. Box 5582
Kent, Washington 98064

[maagneto]

Thanks for the tips, I'll look into it.

Regards

[william palmese]

There is a running totally restored PT Boat in Portland Oregon, Also i know a guy in our Band of Brothers who was a motorman on PT 332. Totally stripped his boat won a race just after the war with top speed o 58 knots.

[Dave Czirr]

LInk to more information about the Oregon PT boat.

http://videos2view.net/PT658.htm

[4M2500W14]

Did you have any luck finding prints of the engine?
I have reams of Navy and Packard maintenance and ops info, but no prints.

If I may ask, what are your plans once you have the gear data: reproduction reverse gear?

[khushfehmi045]

Another idea is you might contact Robert J. Neal, author of "Master Motor Builders" who devotes a detailed chapter to this engine in the book. Mr. Neal does drop in on this forum on occasion but you might do better to contact him thru his publisher:??

[JWLawrence]

Mr. Neal will probably not reply due to health issues. His book, "Master Motor Builders", may still be available.

(o{}o)