X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp118.sbc.mail.re3.yahoo.com ([66.196.96.91] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with SMTP id 3631284 for flyrotary@lancaironline.net; Mon, 04 May 2009 09:15:32 -0400 Received-SPF: neutral receiver=logan.com; client-ip=66.196.96.91; envelope-from=bryanwinberry@bellsouth.net Received: (qmail 73480 invoked from network); 4 May 2009 13:14:58 -0000 Received: from unknown (HELO acer7fbfa7e2f7) (bryanwinberry@68.215.143.21 with login) by smtp118.sbc.mail.re3.yahoo.com with SMTP; 4 May 2009 13:14:57 -0000 X-Yahoo-Newman-Property: ymail-3 From: "Bryan Winberry" To: "'Rotary motors in aircraft'" References: Subject: RE: [FlyRotary] Re: prop? Date: Mon, 4 May 2009 09:14:57 -0400 Message-ID: <02C3FDC6BB0F463FA426C1896AAE7EFF@acer7fbfa7e2f7> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0018_01C9CC98.CBD26B70" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcnMqIezk9dKto4UQG+4GweoQ3wnUQAETBkg In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0018_01C9CC98.CBD26B70 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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 ------=_NextPart_000_0018_01C9CC98.CBD26B70 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Al, Here’s the tech = data:

Max. Leistung / Max. = Power:           &= nbsp;           120 kW (160 HP) @ 2800 rpm [150 – 175 = cm]

(gem. Kennblatt / according TCDS = )          &= nbsp;  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<= o:p>

 

 

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<= font size=3D2 color=3Dblue face=3DArial>,

 

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

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