X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-ey0-f180.google.com ([209.85.215.180] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5040624 for flyrotary@lancaironline.net; Sat, 02 Jul 2011 13:02:33 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.215.180; envelope-from=wdleonard@gmail.com Received: by eyg24 with SMTP id 24so1333072eyg.25 for ; Sat, 02 Jul 2011 10:01:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; bh=e0KyHLtxqBI4mQ7KN27NmHs3a/Kty7x6MkTkszbNgCM=; b=fRWCERz0r5OVoR9pbQVpT4ij/Qmd7GBzR54Wr0AOAvukVvZ/UJevth1dgdv0bWxRYo o8/xZT6gp9F0C+PS7Cu36u3KxCRlK9yLCenM0l2un5sN/x0yoG07uIa5mDG3Opj+OIpq cXHhBlAaE6LFyB5X/Mbp1hbdqjBs1SevPKUh0= MIME-Version: 1.0 Received: by 10.213.103.148 with SMTP id k20mr749873ebo.19.1309626116771; Sat, 02 Jul 2011 10:01:56 -0700 (PDT) Received: by 10.213.13.72 with HTTP; Sat, 2 Jul 2011 10:01:56 -0700 (PDT) Date: Sat, 2 Jul 2011 10:01:56 -0700 Message-ID: Subject: Reno Course Speeds From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=00504502d4797a8ecd04a719174b --00504502d4797a8ecd04a719174b Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable The distance used to calculate the speed on each course is based on turn radius at certain g and speeds for each class. Actual speeds are somewhat higher than calculated speed and the turning really bleeds a ton of energy. The penalty for a side-by-side aircraft really piles up as the speed increases as well. THE CURRENT RACE COURSE LENGTHS ARE: =95 JET CLASS: The Jet Class course is 8.4703 based upon a speed of 525 MPH and 3.5 to 3.7 Gs. =95 UNLIMITED CLASS: The Unlimited Class course is 8.4333 miles based upon = a speed of 500 MPH and 3.5 Gs. =95 GOLD SPORT CLASS: The Gold Sport Class course is 8.35606 miles based up= on a speed of 400 MPH and 3.0 Gs. (based upon the number of modified aircraft) *NOTE: Should there be less than five (5) modified (Gold) Sport Class aircraft, all Sport Class races shall be held on the 6.9992 mile course. =95 SILVER & BRONZE SPORT CLASS: The Silver & Bronze Sport Class course is 6.9992 miles based upon a speed of 375 MPH and 3.0 Gs. =95 T-6 CLASS: The T-6 Class course is 5.0693 miles based upon a speed of 2= 25 MPH and 2.0 Gs. =95 FORMULA ONE CLASS: The Formula One Class course is 3.1875 miles based u= pon a speed of 250 MPH and 3.0 Gs. =95 BIPLANE CLASS: The Biplane Class course is 3.1761 miles based upon a sp= eed of 210 MPH and 3.0 Gs. I could perhaps see pulling 3 gs at 375, but at 210, I'll bet I rarely saw more than 2. To be honest, the fastest line seemed to be a constant turn, except from 3 to 4, and again from 5 to 6. We just weren't fast enough to not have to level out for a bit there. Then the challenge was when to early turn 4 and 6, to set up the follow-on pylons, without having to crank in g, thus scrubbing speed. Much of my excess fuel burn was also from running rich to make sure I avoided detonation. --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Sat, Jul 2, 2011 at 6:29 AM, Charlie England wr= ote: > How big is the course at Reno? Not to denigrate Tracy's performance, but > tight turns scrub off speed quickly flying the RV's fat hershey bar wing. > > Charlie > > > On 07/02/2011 07:11 AM, Tracy wrote: > >> Yep, nobody ever accused Van of not being conservative. Dave Anders do= es >> 265 mph with his RV-4 (stock redline is at 210). The RV-8 has a higher= Vne >> at 230 which is as high as I have taken mine but I have longer than stoc= k >> wings which will make them more likely to flutter. >> >> Very interesting results at Reno Dave. Really points out the value of >> minimizing cooling drag. My standing start average Sun 100 race speed >> (217.57 mph) was about the same as your lap speed. IAS during race was = 220. >> My RV-4 was not especially clean but I did do a reasonable job on cooli= ng >> drag. I burned only a little more than 1/2 of the fuel (17 GPH vs 30 G= PH >> ). >> >> Tracy >> >> Sent from my iPad >> >> On Jul 1, 2011, at 11:31 PM, Ernest Christley wrote= : >> >> On 07/01/2011 05:28 PM, David Leonard wrote: >>> >>>> I love the all-around abilities of the RV, but it really does not belo= ng >>>> at Reno. My IAS (upper 180's KIAS) was above Vans Vne (184 KIAS, but = I have >>>> tested mine to 205 KIAS with TAS being somewhat higher), not sure I wa= nt to >>>> go much faster... Ah, who am I kidding, of course I do. As long as o= ther >>>> RV's are going faster than me... Steve Senegal was doing about 230mph= in >>>> his Super-8 with full length wings... Must... Catch... Steve... >>>> >>> Ya' never know what you can do, >>> Till you take it as far as it will go. >>> >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: http://mail.lancaironline.net:** >>> 81/lists/flyrotary/List.html >>> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net:** >> 81/lists/flyrotary/List.html >> >> > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:** > 81/lists/flyrotary/List.html > --00504502d4797a8ecd04a719174b Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable The di= stance used to calculate the speed on each course is based on turn radius a= t certain g and speeds for each class. =A0Actual speeds are somewhat higher= than calculated speed and the turning really bleeds a ton of energy. =A0Th= e penalty for a side-by-side aircraft really piles up as the speed increase= s as well.=A0

THE CURRENT RACE COURSE LENGTHS ARE:
=95 JET CLASS: The Jet Class co= urse is 8.4703 based upon a speed of 525 MPH and 3.5 to 3.7 Gs.
=95 UNLI= MITED CLASS: The Unlimited Class course is 8.4333 miles based upon a speed = of 500 MPH and 3.5 Gs.
=95 GOLD SPORT CLASS: The Gold Sport Class course is 8.35606 miles based up= on a speed of 400 MPH and 3.0 Gs. (based upon the number of modified aircra= ft)
*NOTE: Should there be less than five (5) modified (Gold) Sport Clas= s aircraft, all Sport Class races shall be held on the 6.9992 mile course.<= br> =95 SILVER & BRONZE SPORT CLASS: The Silver & Bronze Sport Class co= urse is 6.9992 miles based upon a speed of 375 MPH and 3.0 Gs.
=95 T-6 C= LASS: The T-6 Class course is 5.0693 miles based upon a speed of 225 MPH an= d 2.0 Gs.
=95 FORMULA ONE CLASS: The Formula One Class course is 3.1875 miles based u= pon a speed of 250 MPH and 3.0 Gs.
=95 BIPLANE CLASS: The Biplane Class = course is 3.1761 miles based upon a speed of 210 MPH and 3.0 Gs.

I = could perhaps see pulling 3 gs at 375, but at 210, I'll bet I rarely sa= w more than 2. To be honest, the fastest line seemed to be a constant turn,= except from 3 to 4, and again from 5 to 6. We just weren't fast enough= to not have to level out for a bit there. Then the challenge was when to e= arly turn 4 and 6, to set up the follow-on pylons, without having to crank = in g, thus scrubbing speed.

Much of my excess fuel burn was also f= rom running rich to make sure I avoided detonation.
--=A0
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

On Sat, Jul 2, 2011 at 6:29 AM, Charlie England <ceengland@bellsouth.net> wrote:
How big is the course at Reno? Not to denigrate Tracy's performance, bu= t tight turns scrub off speed quickly flying the RV's fat hershey bar w= ing.

Charlie


On 07/02/2011 07:11 AM, Tracy wrote:
Yep, nobody ever accused Van of not being conservative. =A0 Dave Anders doe= s 265 mph with his RV-4 (stock redline is at 210). =A0 The RV-8 has a highe= r Vne at 230 which is as high as I have taken mine but I have longer than s= tock wings which will make them more likely to flutter.

Very interesting results at Reno Dave. =A0Really points out the value of mi= nimizing cooling drag. =A0My standing start average Sun 100 race speed (217= .57 mph) was about the same as your lap speed. =A0IAS during race was 220. = =A0My RV-4 was not especially clean but I did do a reasonable job on coolin= g drag. =A0 I burned only a little more than 1/2 of the fuel (17 GPH vs 30 = GPH ).

Tracy

Sent from my iPad

On Jul 1, 2011, at 11:31 PM, Ernest Christley<echristley@att.net> =A0wrote:

On 07/01/2011 05:28 PM, David Leonard wrote:
I love the all-around abilities of the RV, but it really does not belong at= Reno. =A0My IAS (upper 180's KIAS) was above Vans Vne (184 KIAS, but I= have tested mine to 205 KIAS with TAS being somewhat higher), not sure I w= ant to go much faster... =A0Ah, who am I kidding, of course I do. =A0As lon= g as other RV's are going faster than me... =A0Steve Senegal was doing = about 230mph in his Super-8 with full length wings... Must... Catch... Stev= e...
Ya' never know what you can do,
Till you take it as far as it will go.

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