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[75.253.151.22]) by mx.google.com with ESMTPSA id r5sm14389551qaj.13.2013.12.13.18.10.20 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 13 Dec 2013 18:11:20 -0800 (PST) Subject: Re: [FlyRotary] Re: 2 cycle premix References: From: Tracy Content-Type: multipart/alternative; boundary=Apple-Mail-BDFB6DD9-0996-408B-B472-6F66FA6FC98F X-Mailer: iPad Mail (11B554a) In-Reply-To: Message-Id: <4933714E-3AB4-4278-A427-574F1FFAE019@gmail.com> Date: Fri, 13 Dec 2013 21:09:15 -0500 To: Rotary motors in aircraft Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) --Apple-Mail-BDFB6DD9-0996-408B-B472-6F66FA6FC98F Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Those were RV-4 numbers. RV-8 numbers are about the same, fuel burn is abou= t .5 GPH higher than on -4 at the same speeds, it just goes faster if you u= se the power available while burning lots of fuel at those speeds above 224 m= ph. Those are not really useful throttle settings. Extra power on the -8 i= s mainly used for Higher ROC. Almost 4000 FPM when solo & light fuel load. Tracy Sent from my iPad > On Dec 13, 2013, at 20:15, "Bill Bradburry" wro= te: >=20 > Tracy, > I assume that you are talking about the RV-8 with the 20B here? Could you= update us with the numbers for both aircraft? > =20 > Bill > =20 > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Be= half Of Tracy > Sent: Friday, December 13, 2013 6:06 PM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: 2 cycle premix > =20 > I typically cruise at 5400 - 5600 rpm. WOT at top speed (224 mph) rpm is= 7250. >=20 > Tracy > Sent from my iPad >=20 >> On Dec 12, 2013, at 23:29, "Neil Unger" wrote: >> tracy, >> If you are happy with 6000 for take off, What rpm do you crui= se at? Did you ever manage to get the monitor to record litres?? Neil. >> =20 >> From: Tracy >> Sent: Thursday, December 12, 2013 9:33 AM >> To: Rotary motors in aircraft >> Subject: [FlyRotary] Re: 2 cycle premix >> =20 >> Using a 74 x 88 2blade on my Renesis. I get about 6000 on takeoff so I w= ould not say you have too much prop. possibly too little if that 6800 rpm i= s accurate. 1800 EGT is not unusual at peak EGT & WOT. >> =20 >> .75 oz per gal oil mix. >> =20 >> Tracy >> =20 >>=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 p= ushing over the 1850 degrees. Obviously the prop is too big as revs are res= tricted and the motor is working too hard hence the EGT. What size props ar= e you people running?? 2 rotor renesis. Neil. >>> =20 >>> From: David Leonard >>> Sent: Thursday, August 08, 2013 7:12 AM >>> To: Rotary motors in aircraft >>> 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 wit= hout oil for a tank or two when I didn't plan well. I have also put multi-w= eight 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 >>>=20 >>> 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-ethano= l 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 B= ehalf Of Clouduster >>> Sent: Friday, July 26, 2013 9:17 AM >>>=20 >>> To: Rotary motors in aircraft >>> Subject: [FlyRotary] Re: 2 cycle premix >>> =20 >>> I use a 50 - 50 mix of MM and WalMart 2 stroke @ 0.50 oz/ gal. Mixed in a= uto gas. My engine is a Renesis with 500 +hrs. >>> =20 >>> Dennis H. >>>=20 >>> Sent from my iPad >>>=20 >>>> 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 rot= aries 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 >>>=20 >>>=20 >>>=20 >>> --=20 >>> David Leonard >>>=20 >>> Turbo Rotary RV-6 N4VY >>> http://N4VY.RotaryRoster.net >>> http://RotaryRoster.net --Apple-Mail-BDFB6DD9-0996-408B-B472-6F66FA6FC98F Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Those were RV-4 numbers.  RV-8 nu= mbers are about the same, fuel burn is about .5 GPH higher than on -4 at the= same speeds,  it just goes faster if you use the power available while= burning lots of fuel at those speeds above 224 mph.  Those are not rea= lly useful throttle settings.   Extra power on the -8 is mainly used fo= r Higher ROC.  Almost 4000 FPM when solo & light fuel load.

Tracy

Sent from my iPad

On Dec 13, 20= 13, at 20:15, "Bill Bradburry" <bbradburry@bellsouth.net> wrote:

=

Tracy,

I assume that you are talking about the= RV-8 with the 20B here?  Could you update us with the numbers for both aircraft?

 

Bill

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironli= ne.net] On Behalf Of Tracy
Sent: Friday, December 13, 20= 13 6:06 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 2 cy= cle premix

 

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" <neil.unger@bigpond.com> wrote:

=

tracy,

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

Using a 74 x 8= 8 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.

 

.75 oz per gal= oil mix.

 

Tracy

 


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

=

All,

  &n= bsp;       finally flying again, but my prop is too big. It is a 70=E2=80=9D dia by 90 i= nch pitch.  Max revs on takeoff is about 6800 and the EGT is pushing over t= he 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.=

 

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

Subject: [FlyRotary] Re: 2 cycle premix

 

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

 

Dave Leonard

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

 

Bill B

 

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


To: Rotary motors in aircraft

<= span style=3D"font-size:12.0pt;font-family:Tahoma;color:black;font-weight:bo= ld">Subject: [FlyRotary] Re: 2 cycle premix

 

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.

 

Dennis H.

Sent from my iPad


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

Greetings all,

 

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

 

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

 

Thanks

 

Rich




--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net http://RotaryRoster.net <= /span>

= --Apple-Mail-BDFB6DD9-0996-408B-B472-6F66FA6FC98F--