Randy,

Went out flying yesterday. Tried what you talked about in Stunt News with colder weather engine set ups. Guess what it worked. 5% fuel, raised compression a bit and engine ran fine. Made a prop choice dhange as well and everything just came together. Running DS .61 RE exactly how we run the ST .60 and it runs fine now.

Thanks Randy, appreciate the help.
Gerald

Randy,

Went out flying yesterday. Tried what you talked about in Stunt News with colder weather engine set ups. Guess what it worked. 5% fuel, raised compression a bit and engine ran fine. Made a prop choice dhange as well and everything just came together. Running DS .61 RE exactly how we run the ST .60 and it runs fine now.

Thanks Randy, appreciate the help.
Gerald

Hi Gerald

I am very happy that it was  a help  to you, 
You should  bump up the  nitro  as  the  hot  weather comes in, and you will find  it will keep  everything running the  same.
Let me know  If I can help out

Regards
Randy

Hi Guys,

The DS .61 RE seems to be doing just fine now. The engine is in a modified Trivial Pursuit, one of Ted Fancher's designs. Most of you know the Trivial Pursuit, but I just had to throw a plug Ted's way. I originally built this plane around an ST .60. When finished it came way too heavy, to me anyhow. I sold the plane to a friend and he put a PA .51 with pipe in it and then I bought it back. It flew great, but I just wasn't happy with the pipe set up, I'm old school and old too, so what I really wanted was to fly this plane with the traditional grunt and growl of a .60 engine.

I had a DS .61 RE that was in another plane at the time. I decided to strip the Trivial Pursuit down to bare wood and refinish it. It was a good plane, just needed to be lighter. I retrofitted the DS .61RE in the nose, which really didn't take that much work, although there was some doubt that after drilling out the motor mounts and resetting the mounting holes that it could cause some problems, I went ahead with and there are no signs of any structure failure. After the refinish, I took 6 ounces off the total weight and this is significant believe me. Finished it all back in Brodak dope and it came out fine.

I've had problems getting the "right mixture" of prop, fuel, nitro %, head shims and venturi size all together at once to make this engine happy. The engine really likes to turn a big prop, its happy, very happy with a Rev-Up 13 X 7, turns it like it was nothing, but, the plane isn't happy with this prop on it. Put a Bolly 12 1/2 X 6 1/2 3 blade on it, and the whole package just came together. Its pretty much set just like a Tiger .60 now, thanks Randy.  Running SIG Champion 5% fuel, .300" venturi, PA .61 NVA, SIG Idle bar plug, have 5 head shims to get the same compression as my ST .60's are, had 7 in it running 10% fuel and couldn't find a needle. Anyhow, its all working now, I'm happy, the plane is happy and the engine is happy, we be flyin'. Should be ready for the Northwest Regional's in Eugene, Oregon over Memorial Day Week end. Hope to see you there Walter.

Gerald

Have been flying the DS .61RE a lot lately. Tried all kinds of props, have settled on the Rev Up 13 X 7 cut to 12 1/4". Engine seems to like the load a lot better than running with less pitch and higher RPM. Haven't tached it so don't know exact RPM, but its set so its just breaking in and out of 2/4 on the ground and it does this in level flight also. Breaks into 2 cycle at about 10 o'clock and comes back out at about 2 o'clock. Vertical 8, it stays in 2 clycle until coming downhill. OVerheads same way, plenty of power. Its every bit as strong as my ST .60's, doesn't give anything away in the horsepower department. Its in a 70 ounce Trivail Pursuit, on 64 foot lines. 5.1 to 5.2 lap times. Runs on 4 1/2 ounces of fuel, using SIG Champion 5% nitro, 20% lube, 1/2 & 1/2 synthetic and castor with an ounce of Randy's lube added.

Has always been hard to start inverted on the ground, had to always turn plane over to get started. Got a Kavan electric starter, starts every time inverted, no problem. Doesn't wear me out trying to start it now. Anyhow, thought I'd let all know its finally working. One last thing, 5 head shims, PA .61 NVA, .300" venturi and SIG R/C long idle bar plug. Engine has a little over 3 gallons of fuel through it and its running very nicely now.

Gerald