Al, Here’s the tech data:
Max. Leistung / Max. Power:
120 kW (160 HP) @ 2800 rpm [150 – 175 cm]
(gem. Kennblatt / according TCDS )
133 kW (178 HP) @ 2700 rpm [150 – 160 cm]
Max. Leistung / Max. Power (Design Limit): 120 kW (160 HP)
@ 2800 rpm
Blattzahl / Number of blades: 3
Max. Durchmesser / Max. diameter: 175 cm (69“)
The max for this particular prop is 2800. Van’s
manual says max of 76 for the RV7. I’m not sure if the number of
blades makes a difference.
I think this prop was manufactured for the
165Hp Subie, so it probably won’t work. But I’ll see what the
MT people say.
Bryan
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Al Gietzen
Sent: Sunday, May 03, 2009 10:07
PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: prop?
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
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Bobby J. Hughes
Sent: Sunday, May 03, 2009 5:50 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: prop?
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 3/8th. 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