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Converting an Alpha 40 to a 2 blade prop

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Converting an Alpha 40 to a 2 blade prop

Old 08-08-2010, 06:38 PM
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steve9mm
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Default Converting an Alpha 40 to a 2 blade prop

I purchased an Alpha 40 trainer made by Hanger 9 which comes with an Evolution .45 TPS engine setup for a 3 blade prop. It has been a great trainer but I was thinking of converting it to support 2 blade props to get a little more speed out of it, but I do not know how.
From the Evolution web page I can find the prop recommendations but I could use some help on the steps required in order to mount them
Should I remove the weighted fly wheel and replace it with a prop driver?
Do I need a prop adapter or just a different spinner?
What kind of spinner?
Etc…?

Any help would be great

Thank you,
Steven
Old 08-08-2010, 07:56 PM
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delman
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Default RE: Converting an Alpha 40 to a 2 blade prop

You can knock the center out of the fly wheel weight and put it back on your engine. Try a 11x6 prop. You can use a 2 blade spinner or go get a dubro spinner nut instead. After putting every thing back together recheck your c.g. because of removing the weight up front.
Old 08-08-2010, 08:00 PM
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proptop
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Default RE: Converting an Alpha 40 to a 2 blade prop

Have a look here for some additional info...

http://www.rcuniverse.com/forum/m_98...tm.htm#9814983
Old 08-08-2010, 11:22 PM
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timcat26
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Default RE: Converting an Alpha 40 to a 2 blade prop

I left the flywheel weight on mine and put on an 11x6 prop. This woke it up quite a bit.
Old 08-09-2010, 04:57 AM
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Andrewmc
 
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Default RE: Converting an Alpha 40 to a 2 blade prop

I used a master airscrew 11x 5 - MA props are great for learning to fly as they don't break every time you have a prop strike. The 11x5 prop still gives some good braking for landing when it is brought to idle. I used a du bro 2 1/4 spinner.

Have fun.
Old 08-09-2010, 08:59 AM
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Indy Park Flyer
 
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Default RE: Converting an Alpha 40 to a 2 blade prop

I just removed the 3 blade Prop and installed a Master Air Screw 11x5. Works great and increases the speed and performance. I know some people don't like the fly wheel weight, but I have never removed it and the plane flew great until I had a servo failure and it ended up in a tree. Don't worry my servos were at least 3 years old os I wouldn't expect you to have any problems with servos unless you plane is older.
Indy Park Flyer
Old 08-09-2010, 06:04 PM
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steve9mm
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Default RE: Converting an Alpha 40 to a 2 blade prop

Thanks everyone, that helps alot and I appreciate the help. Hopefully I can handle the speed.

Take Care,

Steven

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