enginehistory.org

lmoretti · Joined: 13 Jul 2003 Posts: 13

Would anybody have any data or drawings for the Brownback Tiger C-400 engine?
It is a static six-cylinder twin-row radial built in the late Twenties by the Light Foundry and Manufacturing Company of Pottstown, PA.
It was designed by Mr. Brownback, based on a development of the Anzani six cylinder engine.
It runs a couple of Bosch FU6BRS89 magnetos and a Stromberg NAR3 carburetor.
What I am most interested in is drawings of the crankshaft counterbalances.
(By the way, I already checked out NASM and EAA).
NASM has one such engine and it seems hard to get one's hands on it for evaluation, so if anybody has a manual for the engine, I would be glad to obtain copies.
Thanks and best regards,
Luigi U. Ricci Moretti

P.S.: Dr. Jeremy Kinney, of the NASM, was kind enough to arrange for a visit. Borescoped the whole thing and got some good information on it. More to follow.

UAHArchives · Joined: 13 Jul 2003 Posts: 4

Yes I have some drawings and an artical on the Brownback. rloftis

lmoretti · Joined: 13 Jul 2003 Posts: 13

I gave up trying to copy them since I could not lay my hands on an original and just redesigned them from the cross sectional drawing of the engine I had in a brochure.
The missing dimensions were determined analytically, based on the formulas provided in the book by Angle (Engine Dynamics and Crankshaft Design).
I weighed all reciprocating masses first.
I used SolidWorks to determine the volume and, by selecting different materials I was able to use the mass properties function to compute the weight and CG (It turned out to be aluminum bronze).
I'd love to post an isometric view of the crankshaft and counterbalaces (needed the crankshaft model to match the mounting screw holes), but have no idea on how to do that.
I am now going to get them machined.
Bye,
Luigi

kmccutcheon · Posted: Wed Apr 07, 2004 15:45 Post subject:

>>I'd love to post an isometric view of the crankshaft and counterbalaces

The crankshaft assembly drawing can be viewed at
http://www.enginehistory.org/Misc/BrownbackC-400/C-400CrankAssy.jpg

A copy of a US patent drawing that I believe covers components of this engine can be viewed at:
http://www.enginehistory.org/Misc/BrownbackC-400/1783698.pdf
_________________
Kimble D. McCutcheon

lmoretti · Joined: 13 Jul 2003 Posts: 13

After finding a crack in the prop hub keyway, it was necessary to REBUILD a NEW crankshaft for my 1929 Brownback Tiger C400 engine.
Something that had not happened since 1929.
Thanks to R&R Industrial Services Ontario, CA, a beautiful new crank was cut from a massive 4340 block to .0005 tolerance.
Now it is just a matter of reassembling and running.
If I remember how to post pictures I will put a few selected ones up for your enoyment.

lmoretti · Joined: 13 Jul 2003 Posts: 13

It must be nearly ten years that I have been going at this and it should be on short finals.
The engine has a new crankshaft, as I wrote last year, and is now back together.
Should run on the test stand within June.
Pictures: http://www.enginehistory.org/BBimages/BrownbackC-400/index.html
By now, since Ralph Graham's Kari Keen Coupe is in a museum and the Smithsonian's will never run, mine will be the only running Brownback Tiger C-400 left.

rkammlott · Joined: 26 Jul 2004 Posts: 47 Location: Teaneck NJ

very interesting project. looking forward to see it running. please post pictures.