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Tue, 02 Aug 2011 20:51:54 PDT X-Mailer: YahooMailWebService/0.8.112.310352 References: Message-ID: <1312343514.34609.YahooMailNeo@web83912.mail.sp1.yahoo.com> Date: Tue, 2 Aug 2011 20:51:54 -0700 (PDT) From: Kelly Troyer Reply-To: Kelly Troyer Subject: Re: Ross Farnham IVO testing To: Rotary motors in aircraft In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1909045155-1312343514=:34609" --0-1909045155-1312343514=:34609 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Doug, Pat and All,=0A=A0=0A=A0=A0=A0=A0=A0=A0 When Tracy tested the "IVO" a= gainst his "Performance Prop" he gained a lot in takeoff and climb=0Aperfor= mance but lost considerable top speed and coolant temp went up.............= He attributed=A0both the=0Aspeed loss and higher coolant temps to the flat = hub area of the "IVO" blades which his spinner did not=0Acover (added drag)= and essentially blocked some coolant air from his radiators...............= .This flat area=0Aalso as has been noted sucks up hp but produces no thrust= ..............=0A=A0=0A=A0=A0=A0=A0=A0 I have a three blade 74 inch electri= c in-flight adjust "IVO" prop=A0for my "Dyke Delta"=A0that if I live long = =0Aenough to get in the air will have a 16 inch diameter=A0 "Mustang 2" spi= nner which will cover most of this=0Aflat area of the "IVO" blade hub......= .......The "IVO" seems to work well in the pushers from all reports=0Asince= the flat blade hubs are=A0mostly=A0shielded by the engine cowl in these in= stallations............IMHO=A0=0A=0AKelly Troyer=0A"DYKE DELTA JD2" (Eventu= ally)=0A"13B ROTARY"_ Engine=0A"RWS"_RD1C/EC2/EM2=0A"MISTRAL"_Backplate/Oil= Manifold=0A"TURBONETICS"_TO4E50 Turbo=0A=0AFrom: Pat Panzera =0ATo: Rotary motors in aircraft =0ASent: Tuesday, August 2, 2011 8:48 PM=0ASubject: [FlyRotary] Re:= Ross Farnham IVO testing=0A=0A=0AJim Smith with his 150 HP, auto-fuel RV-6= is reaching speeds of 200 mph TAS using a fixed-pitch, three-blade wood El= ippse propeller. =0A=0AThat's nearly 30 mph more than the Ivo, on the same?= power.=A0=0A=0A=0A=0AOn Tue, Aug 2, 2011 at 6:18 PM, wr= ote:=0A=0Ahttp://www.sdsefi.com/rv13.htm=0A>=0A>Ross did quite a bit of pro= p testing in turbo subie powered RV-6. =A0I've e-mailed him a few times reg= arding performance, mx issues, etc. and he still thinks it's a good way to = go as long as the Magnum hi pitch blades are used (at least for a/c w/RV ty= pe performance).=0A>Sent on the Sprint=AE Now Network from my BlackBerry=AE= =0A>--=0A>Homepage: =A0http://www.flyrotary.com/=0A>Archive and UnSub: =A0 = http://mail.lancaironline.net:81/lists/flyrotary/List.html=0A> --0-1909045155-1312343514=:34609 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Doug, Pat and All,
 
   &n= bsp;   When Tracy tested the "IVO" against his "Perfo= rmance Prop" he gained a lot in takeoff and climb
performance but lost= considerable top speed and coolant temp went up.............He attributed both t= he
speed loss and highe= r coolant t= emps to the flat hub area of the "IVO" blades which his spinner= did not
cover (added drag) a= nd essentially blocked some coolant air from his radiators................T= his flat area
also as has been not= ed sucks up hp but produces no thrust..............
 
   &n= bsp;  I have a three blade 74 inch electric in-flig= ht adjust "IVO" prop for my "Dyke Delta" that if I live long
enough to get in the= air will have a 16 inch diameter  "Mustang 2" spinner which will cove= r most of this
flat area of the "IVO" blade hub.....= ........The "IVO" seems to work well in the push= ers from all reports
since the flat blade= hubs are mostly shielded= by the engine cowl in these installations............IMHO 
 
Kelly Troyer
"DYKE DELTA JD2" = (Eventually)
"13B ROTARY"_ Engine
"= RWS"_RD1C/EC2/EM2
"MISTRAL"_= Backpla= te/Oil Manifold
"T= URBONETICS"_TO4E50 Turbo

From:= Pat Panzera <editor.contactmagazine@gmail.com&= gt;
To: Rotary motors in= aircraft <flyrotary@lancaironline.net>
Sent: Tuesday, August 2, 2011 8:48 PM
Subject: [FlyRotary] Re: Ross Farnham= IVO testing

Jim Smith with his 150 HP, auto-fuel RV-6 is reaching sp= eeds of 200 mph TAS using a fixed-pitch, three-blade wood Elippse<= /SPAN> propeller.=20

That's nearly 30 mph = more than the Ivo, on the same? power. 


On Tue, Aug 2, 2011 at 6:18 PM, <dlomheim@aol.com> = wrote:
http://www.sdsefi.com/= rv13.htm

Ross did quite a bit of prop testing in turbo subie powered RV-6.  I've e-mailed him a few times regarding pe= rformance, mx issues, etc. and he still thinks it's a good w= ay to go as long as the Magnum hi pitch blades are used (at least for a/c w= /RV type performance).
Sent on the Sprint=AE Now Network from my BlackBerry=AE
--
Homepage:  http://www.f= lyrotary.com/
Archive and UnSub= :   http://mail.lanca= ironline.net:81/lists/flyrotary/List.html
=


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