CRRC Pro GF26I

[eddyimac]

	Quote: Originally Posted by 3DDevil
	You can remove the spring... To fix the choke problem, why dont you make a horn out of aluminum and use a screw in the outer hole throught the horn. Make the horn the shape you need for the choke rod to connect to the servo with no problems.

Thanks for your help!.
Now I have another question
If you look my photos (post #177) you noted my carb doesn´t have the little black angled plastic gas inlet, only the brass gasoline input, BUT looking other picts of the GF26i I see the black angled fuel line connector. In the Box I found only mount hardware. Is this a problem? Can I connect the fuel line directly?.
Sorry my bad English!
And Thanks again!
Eddy

[2robinhood]

I ran a coupler of more props.
Here are the numbers.

Master Airscrew Classic 16 X 10 @ 7800 rpm with 12 lbs. 9 oz. of pull

Master Airscrew wood 18 X 6 @ 7200 rpm with 12 lbs. 8 oz. of pull

[Doublesixes]

I just bought this cute little engine and I'm planning on using it in my 76 inch Extra. It weighs in at 11.5 lbs (dry) and it's currently powered by a ST2300 with a Hawk 18X8 running on 5%. This setup is barely OK for sport flying but not even close for extreme aerobatics, let alone 3D. I've tached the ST @ 6600 rpm with the 18X8 and 7050 with a Hawk 18X6.
I hope this little gasser can provide at least an 800 rpm improvement over glow. I fly a lot and a move to gas will save me a great deal of money. I also hope that having chosen the 26 over the new 50 was not a mistake as I prefer a larger plane adequately powered but with a low wing loading. Any thoughts appreciated.

[vettebob]

I just received myGF26i today. I am suprised the Carb is only 7.94mm venturi my Old Zenoah KG 22 came with a 7.94mm venturi. The Newer Zenoahs come with either a 11.1 or 12.7 mm venturi I wonder if this engine could benefit from this? Mine is going in a Cermark SU-31.

[mattbogy]

You need to lose a pound if you want to 3d this engine. I have had it in the Showtime 90 at 9 3/4 Lbs and a 70" Yak at 9 1/2 lbs. I finally found a good home for this engine in this 71" Spitfire.

[2robinhood]

Yes, 10lbs and under for 3D.
My Laser is @11 lbs 2oz. and the vertilce is limited and any 3D type flying needs to be wide open at that weight.
The lighter the better.

[Doublesixes]

I'm in the process of installing the 26 to my Extra. I will be breaking in the gasser on the plane since I don't have a bench and DA recommends the practice as they claim that harmful vibrations are mitigated by spreading them over the mass of the plane. Sounds good to me. I'll be using a Hawk 18X6 for the first few hours.

[2robinhood]

In this thread on the CRRC 26cc I have posted numbers and pull in weight from a digital scale.
I will post findings of these props in the air as soon as the weather breaks and I can get out to the field.
Pull readings aren't everything, it's an idea, but in the air is where it counts.
I have a Brillelli 36GT in a 14lbs Yak 54.
A Xoar 20 X 8 makes 15 lbs. 1 oz. of pull on the Brillelli.
A APC 18 X 6W makes 13 lbs 15 oz. of pull on the Brillelli.
The APC 18 X 6W smokes the Xoar 20 X 8.
The Yak had limitied verticle with the 20 X 8 ( which shows more lbs. of pull ), but the APC 18 X 6W has unlimited verticle and it shows more then a pound less in pull on the scale.
So when I get out to the field and try these props in the air, I will tell you what I find.
Here are the numbers again of what I was running on the ground with the CRRC Pro GF26I.
I did not do a fine tuning of the engine for these numbers, I just did a prop change. It was tuned to the Xoar 18 X 6, so tweaking to each prop should change the numbers alittle better, but this is a base line guide with these props.

Xoar 16 X 8 @ 8400 rpm with 12.2 lbs. of pull.

Xoar 17 X 6 @ 8400 rpm with 13.3 lbs. of pull. **** Best pull on the ground ****

Xoar 17 X 8 @ 7500 rpm with 11.5 lbs. of pull.

Xoar 18 X 6 @ 7800 rpm with 12.1 lbs. of pull.

APC 18 X 6W @ 7800 rpm with 12.4 lbs. of pull.

Xoar 18 X 8 @7400 rpm with 11.0 lbs. of pull.

Master Airscrew Classic 16 X 10 @ 7800 rpm with 12 lbs. 9 oz. of pull

Master Airscrew wood 18 X 6 @ 7200 rpm with 12 lbs. 8 oz. of pull

[Doublesixes]

Well, after about 500 flips I was able to start my brand new CRRC PRO CF26i. I tried every trick in the book but wasn't getting anywhere until I turned the plane on its side and poured some gas through the velocity stack. Another 100 flips and she came alive. And what a sweet little engine it is!
I ran it for about 10 minutes and it behaved like a swiss clock, idling very smoothly just under 2000 and holding 3300 rpm with no hesitations. Tomorrow will continue the break in. Will post results.

[ken crane]

both of mine seem sweet as well. sounds like i had better luck . my 26 took a little work to get primed but after running on the stand for an hour it starts cold in 3-5 whips. the 50 started in 5 flings from new and the idle set in nicely after about 1/2 hour. both have run on the stand foir 2 plus hours and sing like a lark.

[ken crane]

	Quote: Originally Posted by 2robinhood
	OK, I just did the swap on my Seagull Laser 200. I weighted everything to do the swap and here is what the verdict is: OS Max 1.60FX ( 2 stroke ) with Bisson pitts muffler, Seagull stock aluminum motor mount, engine to mount bolts, mount to firewall bolts, prop and spinner. Total is 3lb. 3.2 oz. CRRC Pro GF26I with CRRC pro pitts muffler, custom made 2 3/4" stand offs, stand off mounting bolts, ignition, ignition battery and switch, prop and spinner. Total is 3 lb. 4.9 oz. I am going to use the same tank, so no differance there. So, an all out even exchange of motors ready to fly gained me 1.7 oz. and about 550 - 600 more rpm with a much better prop. OS with a 18 X 6 Master airscrew wood 7250 rpm. CRRC with a Xoar 18 X 6 wood 7800 rpm. When I get it up in the air, I'll let you guys know. Here is some video links of the Laser with the OS in it. YouTube - RC Seagull Laser 200 with OS Max 1.60FX video 2 YouTube - Seagull laser 200 take off YouTube - RC ultimate bipe 40S knife edge

question for you as i am putting the same motor in the same plane ironicaly. are you happy with the way it flys and where did you mount the fuel tank. i want to move mine under the wing tube.

[Doublesixes]

Man oh Man!!...what ever happened to your Tana?...I had one like yours that got pounded into the ground due to flutter...this little CRRC 26 was intended to for her but I had to change plans after my X100 untimely demise. The Extra is in right now weighs close to 11 lbs so I'll be pushing the envelope a bit.

[ken crane]

that picture is my tribute to my specktrum "reciever lockout" too many seconds to wait before the ground came up! that was a cool plane that had a zenoah g20.it hit so hard that it bent the crank. that motor is going out to a guru in miami for a warming over to go in my super skybolt i am building from a kit.

[2robinhood]

	Quote: Originally Posted by ken crane
	question for you as i am putting the same motor in the same plane ironicaly. are you happy with the way it flys and where did you mount the fuel tank. i want to move mine under the wing tube.

I have my tank in the stock location.
The plane flys well with the GF26I, but it has no where the performance it did with th e OS 1.60FX.
As of now it it a nice sport flyer, but not 3D.
11 lb. 2 oz. is to much for weight for 3Ding with this motor,.
I am still trying different props, but my weather has just been so bad on my flying days.

[ken crane]

	Quote: Originally Posted by 2robinhood
	I have my tank in the stock location. The plane flys well with the GF26I, but it has no where the performance it did with th e OS 1.60FX. As of now it it a nice sport flyer, but not 3D. 11 lb. 2 oz. is to much for weight for 3Ding with this motor,. I am still trying different props, but my weather has just been so bad on my flying days.

one more question. i found that other then the head and pipes the motor fits nicely under the cowl. did you cut the side for the velocity stack or remove it and keep the cowl uncut? this isnt going to be a 3d machine for me just a nice arobatic/imac style plane. have you tried a larger flatter pitch prop? i found with my funtanna and the g20 zenoah that a 16/5 was a much better prop to 3d than the 16/8 that they recomended.