What ever happened to...

[K F Wheeler]

Use to follow Brian Callahan's career so also whatever he had to say twenty some years ago. Last I heard he was doing some studying in Ireland, I believe. They did some studying on nitro engines and figured with the different nitro content what the best percentage was for different size engines. Due to the speed of the flame/burn across given distances. Don't remember what the numbers were, like 75% for .21's, 50% for .45's and 35% for the .67 engines. Said that any higher percentage since the fuel didn't get fully burned before exiting the engine didn't do anything more than cool the engine.
Hoping someone can confirm or correct those numbers for me. And, clue me in on what he's been up to since then???

Ken

 

[K F Wheeler]

Almost 200 views and nobody Knows anything about the numbers I posted. Or, anything about Brian?!?

Ken

 

[shoboat]

Ken,

Brian is alive and well, and enjoying his family and career out in San Diego.
He just built a new 67-Hydro and is
working on oval propeller set ups currently.

Thanks,

Mark Sholund

 

[John Finch]

I can verify the nitro contents per my empirical testing for R/C boat Modeler Magazine back in the late 1980s.

 

[K F Wheeler]

Thanks, Guys!
Really appreciate the info.
Glad to hear Brian is doing well.
Thanks, again!

Ken

 

[Timbo Whalen]

Thanks, Guys!
Really appreciate the info.
Glad to hear Brian is doing well.
Thanks, again!

Ken

Ken-

A lot of Brian's research and papers are doc'd over on Marty Davis' site.....

https://1nitrorc.com/

 

[K F Wheeler]

Thanks, Tim.
I keep forgetting about Marty's info. A lot more there than I remember!

Ken