CRRC Pro GF26I

[juicesqueezer]

	Quote: Originally Posted by babsvdmerwe
	Hi I would like to know what is the most popular airframe to use with the CRRC Pro GF26I Motor. Thanks, Andre.

Just from what I have read and heard, it seems that Texas RC, Troy Built, and Cermark's yaks, edge and extras seem to be ideal for this motor. Anything from a 69" to a 72" and around 9 to 10 lbs. This is from an engine supplier who only sells engines, not planes. I just installed this engine in a Seagull Edge. Will see how it does once I balance it. Hope this helps!

[juicesqueezer]

Here is a picture of the crrc 26 installed in the 540 Edge. Plane balanced out right on the money and weighed in at
9.46 lbs. This should be a rocket, with unlimited vertical! Hope to fly by this weekend and will post results.

[juicesqueezer]

Here is another photo. CG is at 4" behind leading edge.

[3Dguy]

lookin good.

[stratosman]

looks good Juicesqueezer.can't hardly wait for a report as I have one just like it just iching for my 26cc.By the way that 100 will fit nicely in my U CAN DO.

[juicesqueezer]

	Quote: Originally Posted by 3Dguy
	lookin good.

Thanks. Heading up to TN in another month!

[juicesqueezer]

	Quote: Originally Posted by stratosman
	looks good Juicesqueezer.can't hardly wait for a report as I have one just like it just iching for my 26cc.By the way that 100 will fit nicely in my U CAN DO.

Hey Ken, can't wait to fly it either. Have to get more tygon for the vent. Friend of mine told me to loop it around and zig zag and it will prevent the fuel from coming out of vent. Right now, when I turned it upside down, fuel leaked out of vent.
The 100 will scream in the U-Can-Do!
Oh, crank is 8X1.25mm. Will get that nut & washer off hopefully, today!

[falconIII]

F Y I
Setting the ignition timing

"Timing advance" refers to the number of degrees before top dead center (BTDC) ( before top dead centre ) that the spark will ignite the air-fuel mixture in the combustion chamber during the compression stroke. Retarded timing can be defined as; changing the timing so that fuel ignition happens later than the manufacturer's specified time. If the ignition timing, specified by the manufacturer, was to be set at 28 degrees BTDC and it was adjusted to a number lower than 28 degrees BTDC, it would be retarded.
Timing advance is required because it takes time to burn the air-fuel mixture. Igniting the mixture before the piston reaches top dead center (TDC) will allow the mixture to fully burn soon after the piston reaches TDC. If the air-fuel mixture is ignited at the correct time, maximum pressure in the cylinder will occur sometime after the piston reaches TDC allowing the ignited mixture to push the piston down the cylinder with the greatest force. Ideally, the time at which the mixture should be fully burnt is about 20 degrees ATDC (after top dead centre). This will utilize the engine's power producing potential. If the ignition spark occurs at a position that is too advanced relative to piston position, the rapidly expanding air-fuel mixture can actually push against the piston still moving up, causing detonation and lost power. If the spark occurs too retarded relative to the piston position, maximum cylinder pressure will occur after the piston is already traveling too far down the cylinder. This results in lost power, high emissions, and unburned fuel.
The ignition timing will need to become increasingly advanced (relative to TDC) as the engine speed increases so that the air-fuel mixture has the correct amount of time to fully burn. As the engine speed increases, the time available to burn the mixture decreases but the burning itself proceeds at the same speed, it needs to be started increasingly earlier to complete in time. Poor volumetric efficiency at lower engine speeds also requires increased advancement of ignition timing. The correct timing advance for a given engine speed will allow for maximum cylinder pressure to be achieved at the correct crankshaft angular position.

Enrique

[ilias]

Please help me

When i try to start the (cold) engine , it is very difficult to start it. I use an electric starter and is still very difficult to start it

When it's starts the motor has no problem.

I had change the spark and make some adjustments (low - high needle valves) without problems during the flight
I use gasoline with 33:1 oil

Why this happens and what can i do .

[3Dguy]

Alright, I'm gonna try to shove the CRRC 26 into a Hangar-9 Frenzy. I'll tell y'all how it goes...

[juicesqueezer]

	Quote: Originally Posted by ilias
	Please help me When i try to start the (cold) engine , it is very difficult to start it. I use an electric starter and is still very difficult to start it When it's starts the motor has no problem. I had change the spark and make some adjustments (low - high needle valves) without problems during the flight I use gasoline with 33:1 oil Why this happens and what can i do .

Are you sucking the fuel into the carb? It seems that the engine does not pull the gas through the line right away. Have noticed this on mine. Using the starter seems to get it into carb quickly. Pulled the tank and checked the lines and made sure the clamps on the lines were tight for no air, etc. Still seems slow. Will be going out on Labor day and see how it goes. Keeping fingers crossed!

[juicesqueezer]

	Quote: Originally Posted by 3Dguy
	Alright, I'm gonna try to shove the CRRC 26 into a Hangar-9 Frenzy. I'll tell y'all how it goes...

Hey Anderson, good luck with that. Won't be flying until this Monday. Will post on how the 540 does. Later, Joe

[ipsik]

	Quote:
	Please help me When i try to start the (cold) engine , it is very difficult to start it. I use an electric starter and is still very difficult to start it When it's starts the motor has no problem. I had change the spark and make some adjustments (low - high needle valves) without problems during the flight I use gasoline with 33:1 oil Why this happens and what can i do

The CRRC 26cc is very poor on compression when new,
1/turn it over with the ignition OFF and choke on and your thumb or finger over the mouth of the carb until you see fuel pulled all the way to the carb and then a couple more turmns,
2/use an electric starter with the choke on and ignition on til it kicks ( it will probably run for 1/2 a second.
3/ take the choke off, ignition on and spin it with the electric starter, t should start right up. aslight click up on the throttle will help here as well.

Following this procedure mine starts every time.

Once it is worn in a bit with about 4 galoon of gas you can get enough compression to hand start ( flip)it.

[3Dguy]

...

[ilias]

	Quote: Originally Posted by ipsik
	The CRRC 26cc is very poor on compression when new, 1/turn it over with the ignition OFF and choke on and your thumb or finger over the mouth of the carb until you see fuel pulled all the way to the carb and then a couple more turmns, 2/use an electric starter with the choke on and ignition on til it kicks ( it will probably run for 1/2 a second. 3/ take the choke off, ignition on and spin it with the electric starter, t should start right up. aslight click up on the throttle will help here as well. Following this procedure mine starts every time. Once it is worn in a bit with about 4 galoon of gas you can get enough compression to hand start ( flip)it.

Thanks for the message