Real world RPM

[2robinhood]

	Quote: Originally Posted by Bdegan
	Is this photo the CRRC GP50R ?? If so, it looks like a DA with an evolution prop hub.

Yes it is ( CRRC Pro GP50R )
I only got to try one prop for rpm numbers today.
32 oz. of fuel through new engine.
40:1 Pennzoil aircooled.
JFX 23 X 8
A stock DL-100 muffler ( engine comes with a CRRC pitts muffler ).
6930 rpm with 32 oz. of fuel run on a new engine.

Here is the link to my thread.

http://www.flyinggiants.com/forums/fg68/39262-new-50cc-engine-test.html

[meloni.racing]

Hi,

Today I run my DA 170 for the 1st time.....

RE3 tuned pipe whit 12 inch custom headers (to fit my ultimate) around 1/2 inch between headers and pipe.
32-1 penninzoil air cooled , needles on factory position
Vess 32-A
typical winter weather (mid 60's)

Very easy start (like a already used gas engine)
Then around 50 oz at low rpm (2000 2500) to verify that the headers and tuned pipes suppost works well..
Then few minutes to cool down (wasnt very warm anyway) and on the next tank just a quick shot (few second..) to the "high side" of the trottlle to verify how good this engine can run..
IT RUN VERY WELL!! 6200 on the tachometer....very impressive.
P.S. idle nice and low (around 1200)

Well Done Desert Aircraft.

[Tired Old Man]

3w-28i pusher: 13,000 rpm when the prop departs.

[pani]

DA-50
Mezlik 23x10
MTW 11 inch header
MTW RE2 pipe
50:1 Amsoil
Sea level
12 degrees Celsius
1400!!! rpm idle
6930 WOT

[crash-n-burn]

	Quote: Originally Posted by crash-n-burn
	DA 50-R Ignition at 6.0 Volts Es Composites Tuned pipe MTW 25mm Drop header Mezjlik 23x8 CF prop Redline Racing oil 40:1 93 octane pump gas (broken in on 4 gallons 32:1 lawnboy) 465 feet above sea level RPM 7000 all warmed up

Well here is an update, for some reason I am now getting 65-6600 RPM all warmed up which is a thrust difference of 27 - 28 LBS as compared to 31 LBS at 7000 RPM. My header lenght is 12 1/4 inch per Ed at ES composites. I did f-with my high end so maybe it is to lean. Also I tightened my carb bolts to make sure there was no air leak. I will report back after further tuning hopefully I can get back to 7K

[Nelson J]

This is my first Gas plane and after 8 12oz tanks on the bench.
DL 50 stock muffler
Out side temp. around 2°C or 35.6 °F
Needles factory settings H 1 1/2 L 1 1/4
87 octane
Lawnboy 32.1
ProZinger 22x8
Idle 1500 rpm
Max 7500-7600 rpm

Is that OK?

Nelson

[RTK]

Sure, I would use a different prop though, then put it in a plane and fly it already

[Nelson J]

RTK
I'm going to put it in a EF Yak 88" but I haven't recivet it yet, do you think I can use a 23x8 or 23A? any suggestions?

Thanks
Nelson

[RTK]

PM'd ya

[rcign]

Aerrow 200 twin, WB39 carb on a custom reed manifold, RC EXL ignition, 10% glow fuel...
Special bolly 34-10 prop, 7000 rpm..Idles at 900...No mufflers, just 12 inch headers...We're making some adapters for KS 1090s....Starts easily with a flip..I'll be making it a twin spark with CM6 sparkplugs later...

[pe reivers]

Ralph,
please update when you get the pipes on. I would suggest you try the MTW TP3 pipes as well (finance permitting). They have inverse horn factors that seem to broaden the torque range very much.

[MeTwo]

Alt 2200ft. Mezjlik 22x10, 50:1 synthetic oil 92 octane, DA50r, 6800 wot. Crappy canister, with flex header(lol don't know the manufacture. Even they didn't want to put there name on it..) 27.5 lbs thrust.

If you don't own a YAK then you don't own anything..