I have been running a zinger pro 18-6 on my OS 160 with a slimline pitts on an 11.3 lb extra. I am not real happy with the preformance and would like to know what props others are using. Seems like I was getting around 8800-8900 on the third tank, but real world has me at full power trying to maintain a high alpha KE and hovers at 3/4 throttle.
Any suggestions, maybe a 17-8?

It is a 24% CA extra, a mousse can would not be appropriate. Throttle response is OK, some midrange burbling but not much, low end needle had to be leaned quite a bit. No pump

what extra do you have. I am looking for a good one to build in about 6 months are so.

As for throttle responce, how do you like the 1.60.
I have read some guys here on RCU don't like the 1.60

I have only seen 3 OS 1.60 fly. All three were using a moosecan mufflers, and throttle responce and power seemed real good. All three were hovering where their rudders were below knee high.

If you interested in a moosecan for it. Look up a guy here on RCU called Elvis. He sells them out of his hobby shop. He a great asset to the hobby.

Running an os 1.60 on an CGM Sukhoi. 10.5 pounds. Using the zinger 18x10 and it pulls hard. If you go any smaller, the engine seems like it's running too hot. I used OS specs when breaking it in, including the 16" prop and it seemed like it was running so fast the blades were going to fly off.

IMO, that prop combination pulls the plane around easily.

An APC 18/8 is what I found it liked

APC 18-6w is the best!

i guess it has alot to do
on what size plane, what type, and also maybe were u live
i have a 160 in my DP ULTIMATE 120 size spinning a 18x6 and it flys it pretty well, not break neck speed but more than this fragile airframe need's, i tried a 18x5 and it was ok but didnt have the grab (ummph) that the 6 did havnt tried the 18x8 i need to give that a whirl

ps... i only have about 3 gallons on the 160 so it's still breaking in