Happy Fourth of July, Everyone!

Happy 4th!

Mark, nice find on that mint looking O.S. FX .25
I have one tested below, lovely smooth running engine.



OS FX .25 with MACS Tuned Pipe APC 8x8
16,149 rpm / 122 mph / per calc: 3.1 lbs thrust / .994hp or 742w
Quick rev up during break in mode, header cut to 4.25"
Tru Turn 1/4-28 spinner nut.

Happy 4th (now 5th). I have a Magnum .25 R/C, resembles an OS .25 SR. I heard they make good replacements for the old .35's in C/L stunt planes with R/C carb replaced with a venturi.

Hi Mark,
Independence Day is like a birthday... Happy Birthday !
I mentioned in a previous post that I had some r/c carbs to convert your C/L LA.25.
Found the forgotten FX while looking. I remember flying my buddy's Sportster, great plane, great times...
(I have two still great running FXs, plus two MagXLSs that are arguably even better )
I know you will have fun. That is the important part.

Nice run 1/2A nut, 8-8? We used 9-4s to keep speed turning in the rc combat box. Max speed radar'd was 93mph out of a downwind dive with ~1/12th scale combat planes. No pipes, just drilled out/cut off the muffler exit tube. 15% Nitro fuel. Having the sound of 5-10 in the air, all running at peak was awesome ! And trying to bring your streamer back !
GG,
The Magnums are just copies of O.S.s.
GP=FP, Pro=SR, XLS=FX. (the early MagXL was a dud, you want a later XLS)
I've burned out allot of the pre FX .25s trying to mod/keep up with them. Fun times.
The FX.25 is a great engine. (theMagXLS has allen vs phillips screws, even performance )

I like how this forum can change from the topic.

I remember the model mag, that had the introduction of S.M.A.L.L. (Randy Randolf?)
At the time, we were burning jugs of fuel through .40s.
Doubled our flying fun. Never looked back,
Take care,
Have fun,
Dave

HalfaDave wrote:The Magnums are just copies of O.S.s.

I've got the plain bearing crank ones, the .15 is a little powerhouse, probably could power a Ringmaster S1 no sweat (ditto with my OS .15FP-S).

HalfaDave wrote:I like how this forum can change from the topic.

We usually return also.

HalfaDave wrote:I remember the model mag, that had the introduction of S.M.A.L.L. (Randy Randolf?)

Randy was the designer of Bee-tween, low wing reedie powered 2 channel sportster and others.

HalfaDave wrote:At the time, we were burning jugs of fuel through .40s.

Back in the early 1980's while working at Douglas Aircraft, I contacted a couple R/C clubs nearby about joining. They told me flat out I could only join if I flew 4-channel .40 or larger powered aircraft, NO SINGLE OR 2-CHANNEL, NO HALF-A.

Being a reservist,    I'd leave the area on extended weekends and fly at military bases. NO FLYING in local municipal parks. (Kommunist Kalipornia, made sure the door didn't hit me in the   on the way out).

OTOH, visiting my parents living then in Arkansas, the RC club in North Little Rock had a different spirit. All R/C welcome, including half-A, @Kim 's country.

Hi gg,
The Mag.15XLS was the best in SSC. (slow survivable combat) Not flown here.
Same GP=OS for the .15s...
I think piston/cyl/cranks are interchangable, not tried it though.

We had to wait, till the .60 pattern planes did their routines... Refuel.
Then could 'not bother them'...
With our Cox.049s...
Take care,
Have fun,
Dave

Back in 1965 as an 11 YO, rode my bike one weekend to the inactive taxiway at Kessler Air Base in Biloxi, Mississippi. (We lived in a neighborhood just outside the main gate.)

There, the military would fly their R/C planes. I watched a Goldberg Shoestring Racer in yellow with red trim, very professionally finished, after starting, taxi into takeoff position, brake, then take off, do a bunch of stunts, land, taxi to the parking area, brake, then engine shut off.

Before then, I never witnessed a model airplane fly like a real one. It was about then I had just finished my Scientific Musciano designed 18 inch F6F Hellcat with Cox .020 Pee Wee C/L, wing silkspan covered, I painted in dark blue Pactra dope.