Carbon Fiber Pusher Prop 13x4.5 Available

[frank williams]

All,

Mejzlik Modellbau in the Czech Republic has produced a carbon fiber PUSHER prop (13x4.5).  The blades are extremely thin, under-chambered, stiff, and accurately pitched.  The prop weight is very light, ~25 grams.  The finish of the props is superb.

I am selling the prop for $40.00 each.  There is a $5.00 mailing charge for 1-4 props (US only).  PayPal is the preferred method of payment.  Lonestar_77062@Yahoo.com.

The fact that the blades are stiff and do not “flex-in” extra pitch when loaded, means that the required RPM for typical stunt flight is slightly higher than what was used for the thin 4.5” pitch props in plastic.  Typically the RPM required is about 10.1K to 10.3K.   In my opinion, the flight performance with these props at this pitch is superior.  The props can be re-pitched by the user for lower RPM’s if desired.  These props have a robust hub area for both electric and IC engines.

Order at lonestar_77062@yahoo.com while supply lasts,
Frank Williams

[Joe Yau]

Hi Frank,

Do they also make a 12" or 13" CF 3-blade pusher?

[frank williams]

Hi Joe,
Not yet ..... they wanted to see the response to a two blade pusher before they tried a 3 blader.  I plan to check with them again soon.  What would be the best diameter and pitch for a three blade pusher?
Frank

[Tim Stagg]

Frank,

Just sent you some money for one, cant wait to try it.

Thanks

Tim Stagg

[Joe Yau]

What would be the best diameter and pitch for a three blade pusher?
Frank

I think something like a 12" X 5.5 or 5.25 3-blade might be in the ballpark.. (approx 9000rpm @ 55mph)  and some 12.5"-13"  for the 4-strokes (approx 8300rpm @ 55mph).  hard to come up with the precise pitch not knowing how efficient the prop really is, and along with the undercambered blades.   

[Bob Reeves]

I would go for a few 13-5.5's, The old Stalker 3 blade 13-5.5 works well on a Saito 62 and could be trimmed a little for the 56. A reverse pitch version of it would be wonderful.

[James Strickland]

Hey guys,
Please excuse my ignorance as I've never owned or even ran a 4 stroke model engine. I am mildly familiar with their construction layout though, so how do you get one to run backwards? Is the demand great enough that companies are making some reverse rotation crankshafts/ camshafts for the 4 strokers?

James

[Bob Reeves]

Hi James, you need to visit the 4 stroke section..

http://stunthanger.com/smf/index.php?topic=22426.0

Also might want to check the two articles I wote on Saitos on the Gluedobbers web site.

http://www.tulsacl.com/Engines.html

[frank williams]

The reverse cam is an easy mod for the 4 strokes.  Someone should try an OS VF 40 or 46 and rotating the front housing 90 deg to the left.  This yields perfect timing for reversing a two cycle engine.  Easy to do with a bolt on front end or a rear intake engine.  Just a thought.