X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qmta06.emeryville.ca.mail.comcast.net ([76.96.30.56] verified) by logan.com (CommuniGate Pro SMTP 5.3.9) with ESMTP id 4508803 for flyrotary@lancaironline.net; Sat, 16 Oct 2010 19:41:58 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.30.56; envelope-from=hoursaway1@comcast.net Received: from omta06.emeryville.ca.mail.comcast.net ([76.96.30.51]) by qmta06.emeryville.ca.mail.comcast.net with comcast id KbDA1f00216AWCUA6bhPfh; Sat, 16 Oct 2010 23:41:23 +0000 Received: from sz0081.ev.mail.comcast.net ([76.96.26.137]) by omta06.emeryville.ca.mail.comcast.net with comcast id KbhP1f0022xV6SL8SbhPcc; Sat, 16 Oct 2010 23:41:23 +0000 Date: Sat, 16 Oct 2010 23:41:23 +0000 (UTC) From: hoursaway1@comcast.net To: Rotary motors in aircraft Message-ID: <1901666908.404541.1287272483050.JavaMail.root@sz0081a.emeryville.ca.mail.comcast.net> In-Reply-To: Subject: Re: [FlyRotary] Re: Test MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_404540_833577527.1287272483049" X-Originating-IP: [68.61.255.114] X-Mailer: Zimbra 6.0.5_GA_2431.RHEL5_64 (ZimbraWebClient - IE8 (Win)/6.0.5_GA_2427.RHEL4) ------=_Part_404540_833577527.1287272483049 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Never thought of the scale to measure poundage of thrust or pull, I may be = able to do that, will ask around.=C2=A0 Thanks again for the tips & now tha= t you mention it never really ac-cured to me to look for MAP/RPM correlatio= n to power/thrust output, was mainly going by feel/accell from launch & pul= l on the truck feels like she wants to go. David.=20 ----- Original Message -----=20 From: "Ed Anderson" =20 To: "Rotary motors in aircraft" =20 Sent: Friday, October 15, 2010 5:12:40 PM=20 Subject: [FlyRotary] Re: Test=20 I know you will, David, but felt I had to speak up.=20 Can never be to careful at any time with this hobby, but particularly in th= e early part where you are still learning the aircraft and engine.=C2=A0 So= unds like you are certainly getting plenty of RPM and good manifold pressur= e.=C2=A0 I usually caution folks with adjustable props to be careful - in t= hat you can set the pitch to get wild rpm but insufficient thrust.=C2=A0=20 A gent I was acquainted with back in the late 1990s (electronic whiz - sold= modified auto ECUs for aircraft use), set his adjustable such that he got = lots of rpm, but unfortunately not enough thrust to propel him safely out o= f ground effect.=C2=A0 Crashed into a cactus because He could never climb o= ut of ground effect.=20 But if you are getting 5950 at a load of 29.5 (WOT) then that tells me you = have the engine well loaded.=C2=A0 If it were 5950 at say 20-22 inches I wo= uld say you need to increase the bite (pitch) of the blades.=C2=A0 However,= with that high a manifold pressure things look good to me.=20 Now if you would just put a 1000 lb fish scale in that line you have tied t= o the truck, we could get some real thrust measurements {:>)=20 Looking forward to hearing the results=20 Ed=20 From: hoursaway1@comcast.net=20 Sent: Friday, October 15, 2010 2:52 PM=20 To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Test=20 Thanks Ed, will do.=C2=A0=C2=A0 Am getting=C2=A0 5950 RPM, 29.5 MAP static = (tied to PU truck)=C2=A0 Ivo Prop three blade 68" elect. adjusted to fine p= itch ( I think I miss-spoke earlyer, another post, prop dia. of 72", our is= 68", I do have a 72" two blade, not using ).=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 David R. Cook=C2=A0=C2=A0 =C2=A0RV6A Rotary.=20 ----- Original Message -----=20 From: "Ed Anderson" < eanderson@carolina.rr.com >=20 To: "Rotary motors in aircraft" =20 Sent: Friday, October 15, 2010 11:53:11 AM=20 Subject: [FlyRotary] Re: Test=20 Enough to get the old heart a pumping - I still recall it like yesterday.= =20 =C2=A0Be careful on high speed taxi - always make certain you and aircraft = are ready for flight - even unintended flight.=C2=A0 Some folks advocate NO= T doing high speed taxi test due to increased risk during that phase.=C2=A0= =C2=A0 I recall one accident - where individual had not removed control loc= ks - because he was not going to fly, only do taxi test, well he=C2=A0 unin= tentionally lifted off - fortunately only damage to the airplane.=C2=A0 I k= now you won't do that, David, but just be prepared for flight in any case.= =20 Good luck=20 Ed=20 From: hoursaway1@comcast.net=20 Sent: Friday, October 15, 2010 11:31 AM=20 To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Test=20 Ok I'll say something;;;=C2=A0 Insurance coverage for N655HC=C2=A0will be= =C2=A0bound on the 18th of this mth. so high speed taxing will get started,= are running the eng. high power w/cowel all in place testing for any cooli= ng problems, that starts sat. or this evening, now I need to get me up to s= peed/airworthy.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 David R. Cook=C2=A0 RV6A Rotary Lansing MI.=20 ----- Original Message -----=20 From: "Tracy Hallock (RR)" =20 To: "Rotary motors in aircraft" =20 Sent: Friday, October 15, 2010 10:12:41 AM=20 Subject: [FlyRotary] Re: Test=20 Yep, it's quiet, but mail is getting through.=20 From: Dennis Havarlah=20 Sent: Friday, October 15, 2010 8:55 AM=20 To: Rotary motors in aircraft=20 Subject: [FlyRotary] Test=20 Test - too Quiet=20 ------=_Part_404540_833577527.1287272483049 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit
Never thought of the scale to measure poundage of thrust or pull, I may be able to do that, will ask around.  Thanks again for the tips & now that you mention it never really ac-cured to me to look for MAP/RPM correlation to power/thrust output, was mainly going by feel/accell from launch & pull on the truck feels like she wants to go. David.
----- Original Message -----
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, October 15, 2010 5:12:40 PM
Subject: [FlyRotary] Re: Test

I know you will, David, but felt I had to speak up.
 
Can never be to careful at any time with this hobby, but particularly in the early part where you are still learning the aircraft and engine.  Sounds like you are certainly getting plenty of RPM and good manifold pressure.  I usually caution folks with adjustable props to be careful - in that you can set the pitch to get wild rpm but insufficient thrust. 
 
A gent I was acquainted with back in the late 1990s (electronic whiz - sold modified auto ECUs for aircraft use), set his adjustable such that he got lots of rpm, but unfortunately not enough thrust to propel him safely out of ground effect.  Crashed into a cactus because He could never climb out of ground effect.
 
But if you are getting 5950 at a load of 29.5 (WOT) then that tells me you have the engine well loaded.  If it were 5950 at say 20-22 inches I would say you need to increase the bite (pitch) of the blades.  However, with that high a manifold pressure things look good to me.
 
Now if you would just put a 1000 lb fish scale in that line you have tied to the truck, we could get some real thrust measurements {:>)
 
Looking forward to hearing the results
 
Ed

Sent: Friday, October 15, 2010 2:52 PM
Subject: [FlyRotary] Re: Test

Thanks Ed, will do.   Am getting  5950 RPM, 29.5 MAP static (tied to PU truck)  Ivo Prop three blade 68" elect. adjusted to fine pitch ( I think I miss-spoke earlyer, another post, prop dia. of 72", our is 68", I do have a 72" two blade, not using ).                                David R. Cook    RV6A Rotary.
----- Original Message -----
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, October 15, 2010 11:53:11 AM
Subject: [FlyRotary] Re: Test

Enough to get the old heart a pumping - I still recall it like yesterday.
 
 Be careful on high speed taxi - always make certain you and aircraft are ready for flight - even unintended flight.  Some folks advocate NOT doing high speed taxi test due to increased risk during that phase.   I recall one accident - where individual had not removed control locks - because he was not going to fly, only do taxi test, well he  unintentionally lifted off - fortunately only damage to the airplane.  I know you won't do that, David, but just be prepared for flight in any case.
 
Good luck
 
Ed
 
 

Sent: Friday, October 15, 2010 11:31 AM
Subject: [FlyRotary] Re: Test

Ok I'll say something;;;  Insurance coverage for N655HC will be bound on the 18th of this mth. so high speed taxing will get started, are running the eng. high power w/cowel all in place testing for any cooling problems, that starts sat. or this evening, now I need to get me up to speed/airworthy.                        David R. Cook  RV6A Rotary Lansing MI.
----- Original Message -----
From: "Tracy Hallock (RR)" <thallock2@austin.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, October 15, 2010 10:12:41 AM
Subject: [FlyRotary] Re: Test

Yep, it's quiet, but mail is getting through.
 
 

Sent: Friday, October 15, 2010 8:55 AM
Subject: [FlyRotary] Test

Test - too Quiet
 
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