X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nschwmtas02p.mx.bigpond.com ([61.9.189.140] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTP id 6638517 for flyrotary@lancaironline.net; Sat, 14 Dec 2013 00:07:05 -0500 Received-SPF: pass receiver=logan.com; client-ip=61.9.189.140; envelope-from=neil.unger@bigpond.com Received: from nschwcmgw06p ([61.9.190.166]) by nschwmtas02p.mx.bigpond.com with ESMTP id <20131214050629.HFXU2047.nschwmtas02p.mx.bigpond.com@nschwcmgw06p> for ; Sat, 14 Dec 2013 05:06:29 +0000 Received: from UserPC ([121.212.2.183]) by nschwcmgw06p with BigPond Outbound id 1H6A1n00F3wutKt01H6BvE; Sat, 14 Dec 2013 05:06:29 +0000 X-Authority-Analysis: v=2.0 cv=Pdd9d1dd c=1 sm=1 a=vQIC2g550486shX7CclsqQ==:17 a=aAF-ERx40m4A:10 a=JDadKst33uMA:10 a=1IlZJK9HAAAA:8 a=1i3qIJHpN6YA:10 a=Ia-xEzejAAAA:8 a=5Up8faWwAAAA:8 a=pGLkceISAAAA:8 a=pedpZTtsAAAA:8 a=3oc9M9_CAAAA:8 a=N8B9JuSIAAAA:8 a=BYKCv_C_gA9cXpydu9gA:9 a=QEXdDO2ut3YA:10 a=EzXvWhQp4_cA:10 a=v6MMM96S_sUA:10 a=MSl-tDqOz04A:10 a=Z1BvOZmT1TIA:10 a=eJojReuL3h0A:10 a=U8Ie8EnqySEA:10 a=rtZyNJ3v5mkA:10 a=FSD3_u6GEX30sCLt:21 a=5tcorwi7v6xgRKUV:21 a=SSmOFEACAAAA:8 a=uN3GpmYqXStRQYSSqxYA:9 a=gKO2Hq4RSVkA:10 a=UiCQ7L4-1S4A:10 a=hTZeC7Yk6K0A:10 a=frz4AuCg-hUA:10 a=tXsnliwV7b4A:10 a=WaH2HIo-D1smi_td:21 a=1wB2GQ0zcgx267DL:21 a=vQIC2g550486shX7CclsqQ==:117 Message-ID: From: "Neil Unger" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: 2 cycle premix Date: Sat, 14 Dec 2013 16:05:55 +1100 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01CEF8E6.5E873990" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 This is a multi-part message in MIME format. ------=_NextPart_000_000D_01CEF8E6.5E873990 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable gents, Many thanks for the figures. seems that I may not be too = far out at this stage. More flying and figures from summer turbulence! = Takeoff Rpm just over 6300, I think, and then found the mix was very = lean. Had to turn the mix Knob almost to 2,30 and that fixed the very = high EGT=E2=80=99s as well. The engine seems very happy in cruise at = 5300 to 5600 depending on how much fuel you want to use. 5400 rpm and = 22.9 MAP and the fuel I havn=E2=80=99t a clue as have been fiddling to = get it to read Litres. Flew over 2 hours, so will fill the tanks and get = an idea at least, but going at a guess may be around 7.9 Gph at anywhere = between 3 and 5000 feet depending on the thermals. I have a glastar, so = only expecting 130 Kts. Currently getting about 110 or possibly better. = Then I have removed the wheel spats for flight testing in case I had to = land in someones rough paddock, so that may be a loss of 5 kts or more, = then obviously have too much cooling drag as today with 8 inches of my = water exchanger blocked off, I could only get the water to 160 degrees = and oil at 155 degrees, and that is at OAT of high 80=E2=80=99s. Now to = experiment at how much I can block off the inlet to get temps up to 185. = Tracy, your gear is brilliant, congratulations. Neil.=20 From: Bill Bradburry=20 Sent: Saturday, December 14, 2013 3:30 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: 2 cycle premix I get about 185 mph and 8 GPH with my Lancair Legacy FG with the Renesis = at about 5800-6000 RPM, but I doubt I could get 224 mph in a dive! :>) =20 Bill=20 -------------------------------------------------------------------------= ------- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On = Behalf Of Tracy Sent: Friday, December 13, 2013 9:02 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: 2 cycle premix =20 Speed about 165 - 175 mph, 6.5 - 7.5 GPH. These are the Renesis = numbers on RV-4, not the 20B RV-8. =20 Tracy Sent from my iPad On Dec 13, 2013, at 19:14, Thomas Giddings wrote: Tracy: what speed and fuel burn at your cruise settings Kind Regards Tom Giddings =20 =20 On Dec 13, 2013, at 6:06 PM, Tracy wrote: I typically cruise at 5400 - 5600 rpm. WOT at top speed (224 mph) = rpm is 7250. Tracy Sent from my iPad On Dec 12, 2013, at 23:29, "Neil Unger" = wrote: tracy, If you are happy with 6000 for take off, What rpm do = you cruise at? Did you ever manage to get the monitor to record = litres?? Neil. =20 From: Tracy=20 Sent: Thursday, December 12, 2013 9:33 AM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: 2 cycle premix =20 Using a 74 x 88 2blade on my Renesis. I get about 6000 on takeoff = so I would not say you have too much prop. possibly too little if that = 6800 rpm is accurate. 1800 EGT is not unusual at peak EGT & WOT. =20 .75 oz per gal oil mix. =20 Tracy =20 On Dec 10, 2013, at 19:08, "Neil Unger" = wrote: All, finally flying again, but my prop is too big. It is a = 70=E2=80=9D dia by 90 inch pitch. Max revs on takeoff is about 6800 and = the EGT is pushing over the 1850 degrees. Obviously the prop is too big = as revs are restricted and the motor is working too hard hence the EGT. = What size props are you people running?? 2 rotor renesis. Neil. =20 From: David Leonard=20 Sent: Thursday, August 08, 2013 7:12 AM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: 2 cycle premix =20 I use the same mix, but at closer to 1 oz/gal. Why? That is = what Tracy does. Dont think it is very critical over the short term. I = have gone without oil for a tank or two when I didn't plan well. I have = also put multi-weight aviation engine oil in (at .5 oz/gal) on one = occasion when I forgot to bring along any 2-stroke oil at all. =20 Dave Leonard On Fri, Jul 26, 2013 at 11:39 AM, Bill Bradburry = wrote: I use the same mix as Dennis but at the rate of 3/4 oz/gal in = non-ethanol auto gas. My engine is a Renesis with 70 flight hours. =20 Bill B =20 ------------------------------------------------------------------------ From: Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On Behalf Of Clouduster Sent: Friday, July 26, 2013 9:17 AM=20 To: Rotary motors in aircraft Subject: [FlyRotary] Re: 2 cycle premix=20 =20 I use a 50 - 50 mix of MM and WalMart 2 stroke @ 0.50 oz/ gal. = Mixed in auto gas. My engine is a Renesis with 500 +hrs. =20 Dennis H. Sent from my iPad On Jul 25, 2013, at 16:29, ARGOLDMAN@aol.com wrote: Greetings all, =20 For those of you who are actually flying and have some time on = your rotaries and are using Pre-mix 2 cycle oil: =20 1) what oil are you using 2) why that brand 3) what ratios are you using 4 where is the best place to get it =20 Thanks =20 Rich --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net=20 ------=_NextPart_000_000D_01CEF8E6.5E873990 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
gents,
           &n= bsp;=20 Many thanks for the figures. seems that I may not be too far out at this = stage.=20 More flying and figures from summer turbulence!  Takeoff Rpm just = over=20 6300, I think, and then found the mix was very lean. Had to turn the mix = Knob=20 almost to 2,30 and that fixed the very high EGT=E2=80=99s as well.  = The engine=20 seems very happy in cruise at 5300 to 5600 depending on how much fuel = you want=20 to use. 5400 rpm and 22.9 MAP and the fuel I havn=E2=80=99t a clue as = have been fiddling=20 to get it to read Litres. Flew over 2 hours, so will fill the tanks and = get an=20 idea at least, but going at a guess may be around 7.9 Gph at anywhere = between 3=20 and 5000 feet depending on the thermals.  I have a glastar, so only = expecting 130 Kts. Currently getting about 110 or possibly better. Then = I have=20 removed the wheel spats for flight testing in case I had to land in = someones=20 rough paddock, so that may be a loss of 5 kts or more, then obviously = have too=20 much cooling drag as today with 8 inches of my water exchanger blocked = off, I=20 could only get the water to 160 degrees and oil at 155 degrees, and that = is at=20 OAT of high 80=E2=80=99s.  Now to experiment at how much I can = block off the inlet=20 to get temps up to 185.   Tracy, your gear is brilliant,=20 congratulations.  Neil.=20
Sent: Saturday, December 14, 2013 3:30 PM
Subject: [FlyRotary] Re: 2 cycle premix
 

I get about = 185 mph and=20 8 GPH with my Lancair Legacy FG with the Renesis at about 5800-6000 RPM, = but I=20 doubt I could get 224 mph in a dive!  = :>)

 

Bill=20

From:=20 Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On=20 Behalf Of Tracy
Sent: Friday, December 13, 2013 = 9:02=20 PM
To: = Rotary motors in aircraft
Subject: [FlyRotary] Re: 2 cycle=20 premix

 

Speed about 165 - 175 mph,  6.5 - 7.5=20 GPH.   These are the Renesis numbers on RV-4, not the 20B=20 RV-8.

 

Tracy

Sent=20 from my iPad


On Dec 13, = 2013, at=20 19:14, Thomas Giddings = <n360tg@earthlink.net>=20 wrote:

Tracy: = what speed=20 and fuel burn at your cruise settings

Kind = Regards

Tom = Giddings

 

 


On Dec = 13, 2013, at=20 6:06 PM, Tracy=20 <rwstracy@gmail.com>=20 wrote:

I typically cruise at 5400 - 5600 = rpm.  =20 WOT at top speed (224 mph) rpm is = 7250.


Tracy
Sent from my=20 iPad


On Dec = 12, 2013, at=20 23:29, "Neil Unger" <neil.unger@bigpond.com>=20 wrote:

tracy,

            = If you are happy with 6000 for take off, What rpm do you cruise=20 at?   Did you ever manage to get the monitor to record = litres??=20 Neil.

 

From: Tracy=20

Sent: = Thursday,=20 December 12, 2013 9:33 AM

To: Rotary motors in = aircraft=20

Subject: = [FlyRotary]=20 Re: 2 cycle premix

 

Using a 74 x=20 88 2blade on my Renesis.  I get about 6000 on takeoff so I = would not=20 say you have too much prop.   possibly too little if = that 6800=20 rpm is accurate.    1800 EGT is not unusual at peak = EGT=20 & WOT.

 

.75 = oz per gal=20 oil mix.

 

Tracy

 


On Dec 10,=20 2013, at 19:08, "Neil Unger" <neil.unger@bigpond.com>=20 wrote:

All,

         =20 finally flying again, but my prop is too big. It is a = 70=E2=80=9D dia by 90 inch=20 pitch.  Max revs on takeoff is about 6800 and the EGT is = pushing=20 over the 1850 degrees.  Obviously the prop is too big as = revs are=20 restricted and the motor is working too hard hence the = EGT.  What=20 size props are you people running??  2 rotor renesis.  = Neil.

 

Sent: = Thursday,=20 August 08, 2013 7:12 AM

Subject: = [FlyRotary]=20 Re: 2 cycle = premix

 

I = use the=20 same mix, but at closer to 1 oz/gal.  Why?  That is = what=20 Tracy=20 does.  Dont think it is very critical over the short = term.  I=20 have gone without oil for a tank or two when I didn't plan = well.  I=20 have also put multi-weight aviation engine oil in (at .5 oz/gal) = on one=20 occasion when I forgot to bring along any 2-stroke oil at=20 all.

 

Dave=20 Leonard

On = Fri, Jul=20 26, 2013 at 11:39 AM, Bill Bradburry <bbradburry@bellsouth.net>=20 wrote:

I use = the same=20 mix as Dennis but at the rate of 3/4 oz/gal in non-ethanol auto=20 gas.  My engine is a Renesis with 70 flight=20 hours.

 

Bill=20 B

 

From:=20 Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of = Clouduster
Sent: Friday, July 26, = 2013 9:17 AM=20


To: Rotary motors in = aircraft

Subject:=20 [FlyRotary] Re: 2 cycle premix=20

 

I use a 50 - 50 mix of = MM and=20 WalMart 2 stroke @ 0.50 oz/ gal. Mixed in auto gas.  My = engine is a=20 Renesis with 500 +hrs.

 

Dennis H.

Sent = from my=20 iPad


On Jul 25, 2013, at = 16:29, ARGOLDMAN@aol.com=20 wrote:

Greetings=20 all,

 

For those of=20 you who are actually flying and have some time on your = rotaries and=20 are using Pre-mix 2 cycle oil:

 

1) =20 what oil are you using

2)  =20 why that brand

3)  =20 what ratios are you using

4   =20 where is the best place to get it

 

Thanks

 

Rich

=



--
David Leonard

Turbo Rotary RV-6 = N4VY
http://N4VY.RotaryRoster.nethttp://RotaryRoster.net=20 =

<= /DIV>
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