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Vendors Corner => Brodak Electric Products => Topic started by: Don Coe on February 15, 2016, 09:54:43 AM

Title: Electric Prop Question
Post by: Don Coe on February 15, 2016, 09:54:43 AM

I've got an electric P-40B Flying Tiger ARF.  Engine is the recommended 2820/07.  Instructions call for an 11 x 5.5 electric prop.  I'd like to run a 3 blade prop.  Question is, what size?    H^^

Title: Re: Electric Prop Question
Post by: Tim Wescott on February 15, 2016, 10:24:05 AM

I'd start with a 10x5 and experiment from there.  Are there any 'lectric 3-bladers?

Title: Re: Electric Prop Question
Post by: Don Coe on February 15, 2016, 10:29:33 AM

Thanks for the reply Tim.  Yes, they do make 3 blade props for electric but could you use a gas/glo prop?

Title: Re: Electric Prop Question
Post by: Phil Krankowski on February 16, 2016, 09:13:14 PM

Yes, you can use a gas/glow prop.   A gas glow prop is thicker, heavier, and often has wider blades than the electric prop in the closest style from the same manufacturer.  Electric is lower vibration and generally run at slower RPM than glow.  Using a glow prop on electric is one way to solve prop flutter problems.

The other way around is a bad idea though.  Starting and engine vibration can break the prop.

Phil

Title: Re: Electric Prop Question
Post by: Don Coe on February 17, 2016, 10:36:14 AM

 H^^  Thanks for the info. 

Title: Re: Electric Prop Question
Post by: Joe Yau on October 16, 2016, 01:43:13 PM

Quote from: Don Coe on February 15, 2016, 10:29:33 AM

Thanks for the reply Tim.  Yes, they do make 3 blade props for electric but could you use a gas/glo prop?

The problem with gas/glo props is they are usually thicker and heavier.. which will use more batteries vs electric props.

Title: Re: Electric Prop Question
Post by: Don Coe on October 18, 2016, 08:40:13 AM

I went with a Master Airscrew 10/7.  Couldn't find a 10/5.  Not a large selection.  Plane seems a little faster at the same power setting and looks a lot meaner.  I happy.