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Engine basics => Engine set up tips => Topic started by: Mitch Stein on September 13, 2006, 11:56:12 AM

Title: Prop Recommendation
Post by: Mitch Stein on September 13, 2006, 11:56:12 AM

Hi,

I am putting together a Brodak Super Clown ARF and have an OS .25LA-s motor for it. My Son and I are both beginners and I would like to know what size prop is recommended for beginner flight.

Thanks,

Mitch

Title: Re: Prop Recommendation
Post by: Tom Perry on September 13, 2006, 12:08:24 PM

A 9-5 would be a good start.   #^

Title: Re: Prop Recommendation
Post by: Bob Reeves on September 13, 2006, 12:23:18 PM

You can try a 9-5 if it's a Master Airscrew plastic, if APC I would go with a 9-4 or maybe even 9-3 if you can find one.

Title: Re: Prop Recommendation
Post by: peabody on September 13, 2006, 01:11:28 PM

Yup...I'm for a 9X4 APC, or an 8X4 Master Airscrew

Title: Re: Prop Recommendation
Post by: Steve Helmick on September 18, 2006, 09:00:36 PM

The .25LA is good with a 9-4 APC (and a reasonable load for a new engine). My Skyray likes a 9-4 Graupner a bit better. A 10-4 Top Flite Power Point (admittedly thinned some) shows promise. As the engine gets more time on it, I'm going to try 10-3 and 10-4 APC and Graupners, and I have a 10-4 Taipan to try.

 The Super Clown is a fair sized airplane, so I wouldn't expect an 8" prop to work very well. Dan McEntee reported the .25LA works well with a 10-4 APC on his Primary Force....in St. Louis. I'd expect it to work better yet, here in Seattle, with cooler temps and lower humidity. I'm also going to look on the APC website and see if there's anything in the 9.5 x 4 range. They have lots of stuff never seen in the LHS.

Never stop testing new props. Find one that works, but keep looking for a better one. The prop that flies the model best may well make it last longer.  y1 Steve