I would add that an LA25 has significantly more power than that old K&B 29...(a good running but pretty weak engine)
The LA25 with a 5-4 or 10-4 prop at about 10,000 RPM in a wet two stroke will just about double it's "power".
Definitely the best choice in my opinion, unless of course you just want to "play" with the old K&B.
Randy Cuberly
Hi All, 10,000rpm with a 10 x4" prop is flying at approx. 38mph;
this is ridiculously slow for the Galaxy design. The Guillows Galaxy was
designed as a Sport/Combat model; It turns as well as that 1950's
standard, The FliteStreak. Whichever engine you use, prop it to fly
70-80 mph. This is easily achievable with any late 1950's engine,
such as the ST 29-35BB, Johnson 29-35, K&B green head 29-35,
the OS Max-1 29-35s or the Veco late series 29-35 engines. Oh Dear,
how can I forget the many Fox Combat 35/36 engines? These late 1950s
through early 1960s engines should be affixed with 9" X 7" props.
I'm not sure what prop would be best for your LA 25, I've never played with
one. I'll guess that an 8" x 6" would be effective or try a 9" x 6" if the LA 25
has the ability to swing that prop. Find out what the Speed Limit Combat
flyers are using on their LA 25s. The only experience I have with an OS .25
is my OS 25 FSR, which is significantly more powerful than the latter LA series.
James, I do wish you much enjoyment and success with your Brodak Galaxy.
Tony