AP wasp .061
11-05-2006, 05:55 PM
#1
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AP wasp .061
i am wondering if a 7x4 prop would be suitable for this engine if it wqas being used in a 35 inch wingspan trainer. also does anybody know what fuel to use for this engine. i am new to nitro so any suggestions and help are welcome.
11-05-2006, 06:20 PM
#2
RE: AP wasp .061
Hey, jerusha. I just bought one of these a while back; it's about 2/3rds broken in. AP recommends 15% nitro for break in, but 1/2A engines run best with 20 to 25% nitro once broken in. You'll want to add the extra head shim if you go above 25% nitro. Make sure your fuel has castor oil and at least 20% to 22% total oil content. Sig sells an excellent 1/2A fuel blended specifically for small engines. Byron sells a 1/2A blend, too, but you need to add a few ounces of castor to the jug (it's only 16% oil).
Don't expect the power to be anywhere near a Norvel, but the AP Wasp is a great little engine. They start instantly and have an excellent carb with exceptional throttling. I would not bog down this engine with a 7" prop. The APC 5x7.3 is perfect. A 35" span trainer will be a perfect fit for the Wasp.
You might want to check out the 1/2A forum here at RCU. A lot of really great people with tons of experience with small engines (a few widely know Cox experts hang out there, too). Enjoy the engine.
David
Don't expect the power to be anywhere near a Norvel, but the AP Wasp is a great little engine. They start instantly and have an excellent carb with exceptional throttling. I would not bog down this engine with a 7" prop. The APC 5x7.3 is perfect. A 35" span trainer will be a perfect fit for the Wasp.
You might want to check out the 1/2A forum here at RCU. A lot of really great people with tons of experience with small engines (a few widely know Cox experts hang out there, too). Enjoy the engine.
David
