But the MT website definitely says 160 max.

Yes; but 160 what?  Are you sure the units are hp?  Maybe KW; or something else.  I think 160 KW translates to about 215 hp, but I haven’t looked it up.  Still sounds to low for the prop.  Isn’t a 73” 3-blade a bit+ much for your plane and engine?  What’s your max prop rpm?

 

Al G

BW

 

 

 

Bryan,

 

Not sure about the HP rating. Sounds too low. With the MT you should be able to turn 7500 rpm.  The holes can be opened up. Jim at http://www.lessdrag.com/ is an MT dealer that a couple of us purchased our props from. Jim sells the 7/16 threaded Lycoming inserts but they are not cheep.  I think the Egg subi guys put the prop in manual mode before doing acro. 

 

 Bobby

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bryan Winberry
Sent: Sunday, May 03, 2009 2:23 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] prop?

I’m a novice when it comes to props. So, could I get some advice about the following prop that a guy has for sale.

I have a Renesis with the RD-1C (RV 7). Plan on using the rotary cowl.

The prop is question is a 3-blade MT.  Model MTV 7-C-187-139.  that’s 73” diameter, electrically adjustable.

Firstly, the bolts are 7/16 and the PSRU is 3/8^th.  Would there be a problem opening the holes?

Secondly, the website (MT) indicates that 160 is max HP for the prop, but it also says that 175 is max diameter.  This one is 187cm (73”).

I have sent an email to MT regarding this, but want to let it get kicked around here on the forum.

Lastly, in the construction manual, Van’s doesn’t recommend aerobatics with an electrically adjustable prop.

Thanks in advance for your replies.

Bryan