Real world RPM - Page 19

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Al Lewis · 08-20-2009, 08:55 PM

The Venom heat gage is a small unit with an LED readout that has a loop with a thermocouple in it. You run the loop around the base of your cylinder and it gives you the highest temperature reached during the flight.

pe reivers · 08-22-2009, 07:20 AM

I use the Venom gauge as well, tied to the cylinder back wall just beneath the uppermost cooling fin. As supplied, it does have very short leads and battery life though.
Some extra information:
The sensor is a glass bead NTC resistor, so the leads can be lengthened. The tiny battery inside can be replaced by a single NiMH cell on long leads as well. Currently I run a test. The Venom has been operating for 35 days now on a single 2500 mAh cell with the charge still going strong, leads to the battery are about 15" long.

6443jb · 08-29-2009, 10:45 PM

bme 58
40-1 penzoil air cooled
jtec raparround
3w 24/8
a little over 7000rpms

6443jb · 08-29-2009, 10:49 PM

bme 116
40-1 penzoil air cooled
jtec pipes
xoar 28/10 pt
6200rpms

Flatlandman · 08-29-2009, 10:56 PM

Old DA 100
100 to 1 Amsoil
Jtech mufflers
Mezjlick 27x10
6590 RPMs

Hibrass · 08-30-2009, 07:28 AM

DLE 111
Xoar 28-10
50/1 Synth
2000ft alt
5700 RPM

I kinda thought it would turn a little higher than that but it seems to run well and it only has 3 gallons thru it...

Ed

pe reivers · 08-30-2009, 09:48 AM

MVVS 116 TD110 cans
Xoar 28x12 5850
Mejzlik 28x12 6300
40:1 fuel

freezer · 08-31-2009, 10:25 AM

DLe-55, J-Tec pitts muffler.
Biela 22X8 ~7300Rpm
Mejzlik 23X8 ~7100 Rpm
~20mtrs above sea level, 3 gallons through.

The most interesting in this thread is that many people with stock muffler has 10-20% or even more power as listed in specifications

.

You can try this prop calc

http://mvvs.nl/prop-power-calculator.xls

Low_N_Slow · 08-31-2009, 12:38 PM

DL50
Stock side-dump muffler
Vess 22A
32:1 Pennzoil aircooled
~ 50ft above sea level
Still new ~ one gallon through it
7740 rpm peak on the ground, fattened to 7650 rpm.

I'm thinking this is too high & may try a 23A

Kema · 09-01-2009, 03:25 AM

MVVS 58( not prosport )
MTW RE 2 pipe
MTW DIY kit ~300mm header
Bambula 24x8
7682 rpm
Fuel: Neste Futura 2t small engine gas(2% synth oil)

mytms · 09-01-2009, 11:27 PM

DA- 50 WITH A DL-55 JUG AND STROKER CRANK, = 60 CC.
4TH TANK
1600 FT ALT.
SILENT BEAUTY COMPACT MUFFLER
23-8 PT PROP = 7600 RPM
VESS 24A = 6850 RPM

Super08 · 09-04-2009, 11:57 PM

Impressive..

sTACYLLOYD · 09-05-2009, 03:55 AM

da 150 on mtw cans my best was 5880 i have not seen anyone with a da 150 get over 6000 rpm

gen3v8 · 09-05-2009, 07:04 AM

DLE 30 first tank 91 octane 32:1 mineral Top flite 18x6-10 7600.
Two days of flying and on an APC 18x8 8940 rpm

toti_ducati · 09-13-2009, 11:45 AM

DLE 111 stock mufflers 4th gallon vess 27B 6450 RPM

shortly after RIP after the rear crank bearing broke and ate everything up

08-20-2009, 08:55 PM	#271
Al Lewis Bad-ass Super Contributer! Join Date: Nov 2007 Location: Port Orchard, WA Age: 61 Posts: 6,864 Awards Showcase Total Awards: 3	Re: Real world RPM The Venom heat gage is a small unit with an LED readout that has a loop with a thermocouple in it. You run the loop around the base of your cylinder and it gives you the highest temperature reached during the flight. Attached Thumbnails 41.4 KB · Views: 29 __________________ http://www.southeastrcengines.com http://www.vessaero.com Remember every second of every day there are thousands of men and women giving of their lives to keep you safe. Never forget them for they never forget you!! Last edited by Al Lewis; 08-20-2009 at 09:01 PM.

08-22-2009, 07:20 AM	#272
pe reivers Bad-ass Super Contributer! Join Date: Apr 2007 Location: The netherlands Age: 68 Posts: 1,590	Re: Real world RPM I use the Venom gauge as well, tied to the cylinder back wall just beneath the uppermost cooling fin. As supplied, it does have very short leads and battery life though. Some extra information: The sensor is a glass bead NTC resistor, so the leads can be lengthened. The tiny battery inside can be replaced by a single NiMH cell on long leads as well. Currently I run a test. The Venom has been operating for 35 days now on a single 2500 mAh cell with the charge still going strong, leads to the battery are about 15" long. __________________ Best regards, Pe Reivers Dealer for MTW, MVVS, MOKImotor, Mejzlik, Xoar, RCexl www.mvvs.nl www.prme.nl/forum/

08-29-2009, 10:45 PM	#273
6443jb Gettin' Lower! Join Date: Apr 2009 Location: bella vista AR Age: 29 Posts: 41	Re: Real world RPM bme 58 40-1 penzoil air cooled jtec raparround 3w 24/8 a little over 7000rpms

08-29-2009, 10:49 PM	#274
6443jb Gettin' Lower! Join Date: Apr 2009 Location: bella vista AR Age: 29 Posts: 41	Re: Real world RPM bme 116 40-1 penzoil air cooled jtec pipes xoar 28/10 pt 6200rpms

08-29-2009, 10:56 PM	#275
Flatlandman Your my boy Blue!!!1 Join Date: Jan 2006 Location: Lexington Kentucky U.S.A. Posts: 4,209	Re: Real world RPM Old DA 100 100 to 1 Amsoil Jtech mufflers Mezjlick 27x10 6590 RPMs __________________ Thanx to The Crew Mike B. Jim Z. Ed J. Jim S. Airman Wheels www.jerseymodeler.com lazertoyz.com

08-30-2009, 07:28 AM	#276
Hibrass Bad-ass Super Contributer! Join Date: Oct 2007 Location: Farmington WV Age: 48 Posts: 259	Re: Real world RPM DLE 111 Xoar 28-10 50/1 Synth 2000ft alt 5700 RPM I kinda thought it would turn a little higher than that but it seems to run well and it only has 3 gallons thru it... Ed

08-30-2009, 09:48 AM	#277
pe reivers Bad-ass Super Contributer! Join Date: Apr 2007 Location: The netherlands Age: 68 Posts: 1,590	Re: Real world RPM MVVS 116 TD110 cans Xoar 28x12 5850 Mejzlik 28x12 6300 40:1 fuel __________________ Best regards, Pe Reivers Dealer for MTW, MVVS, MOKImotor, Mejzlik, Xoar, RCexl www.mvvs.nl www.prme.nl/forum/

08-31-2009, 10:25 AM	#278
freezer Bad-ass Super Contributer! Join Date: Jan 2009 Location: Riga, Latvia. Posts: 242	Re: Real world RPM DLe-55, J-Tec pitts muffler. Biela 22X8 ~7300Rpm Mejzlik 23X8 ~7100 Rpm ~20mtrs above sea level, 3 gallons through. The most interesting in this thread is that many people with stock muffler has 10-20% or even more power as listed in specifications . You can try this prop calc http://mvvs.nl/prop-power-calculator.xls Last edited by freezer; 08-31-2009 at 05:32 PM.

08-31-2009, 12:38 PM	#279
Low_N_Slow a.k.a. ArcherIIDriver Join Date: Oct 2008 Location: Spring, TX Posts: 96	Re: Real world RPM DL50 Stock side-dump muffler Vess 22A 32:1 Pennzoil aircooled ~ 50ft above sea level Still new ~ one gallon through it 7740 rpm peak on the ground, fattened to 7650 rpm. I'm thinking this is too high & may try a 23A

09-01-2009, 03:25 AM	#280
Kema Flyin' Around Join Date: Dec 2008 Posts: 16	Re: Real world RPM MVVS 58( not prosport ) MTW RE 2 pipe MTW DIY kit ~300mm header Bambula 24x8 7682 rpm Fuel: Neste Futura 2t small engine gas(2% synth oil)

09-01-2009, 11:27 PM	#281
mytms Super Contributer Join Date: Mar 2006 Location: Limestone, Tn, United States Age: 41 Posts: 129	DA 60 CONVERSION DA- 50 WITH A DL-55 JUG AND STROKER CRANK, = 60 CC. 4TH TANK 1600 FT ALT. SILENT BEAUTY COMPACT MUFFLER 23-8 PT PROP = 7600 RPM VESS 24A = 6850 RPM

09-04-2009, 11:57 PM	#282
Super08 Who put that tree there? Join Date: Mar 2008 Location: Fort McMurray AB Age: 51 Posts: 3,854	Re: Real world RPM Impressive..

09-05-2009, 03:55 AM	#283
sTACYLLOYD one dumb puppy Join Date: Nov 2006 Location: United States, FL, Port Charlotte Posts: 133	Re: Real world RPM da 150 on mtw cans my best was 5880 i have not seen anyone with a da 150 get over 6000 rpm

09-05-2009, 07:04 AM	#284
gen3v8 Gettin' Lower! Join Date: Dec 2007 Location: Sydney Australia Age: 50 Posts: 66	Re: Real world RPM DLE 30 first tank 91 octane 32:1 mineral Top flite 18x6-10 7600. Two days of flying and on an APC 18x8 8940 rpm __________________ Small toy plane Bigger toy plane Noisy toy plane Lots of greasy/ Less now/ toy planes Last edited by gen3v8; 09-07-2009 at 02:47 AM.

09-13-2009, 11:45 AM	#285
toti_ducati Flyin' Around Join Date: Jun 2008 Location: manila, Phil/ West covina, CA Posts: 24	Re: Real world RPM DLE 111 stock mufflers 4th gallon vess 27B 6450 RPM shortly after RIP after the rear crank bearing broke and ate everything up __________________ EF Yak 54 110' Hangar 9 33% Extra 330L EF Yak 54 88' Fury Extreme 3D 90' Hirobo Eagle 3 WC

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