CRRC Pro GF26I

[nicetie]

Craig, It's not as simple as you imagine. The DX7 assigns a switch to each
programmable mix. The switch has to be disabled in order to avoid accidental
reversing of one control surface while flying. This isn't mentioned in the book
or in your post so you may not be aware of it.

Ken

	Quote: Originally Posted by hardtop351
	heya trike..... ive been looking at the manual for the spektrum dx7 here. i found that on page 56 it mentions about using 2 servos on 2 channels. its in the programable mixing 1-6. if you use mix number 5 or 6 you will have a "dual servo trim function" where a primary control surface trim will control the slave servo. i have used this programming myself on my JR 9XII radio...its the same as the dx7 (the dx7 programming is the same as JR anyways) thought this may help cheers craig

[mattbogy]

Really enjoying the virtually unlimited flight time using this engine. Was at a 3D Fun Fly event today and had no worries about having to land when the pattern got busy. No problems with this engine when you actually use it for flying. I guess if I put it under a microscope, I would find flaws with any engine. Trouble free starting and running for me and I hope to get a little more power once it is completely broke in.

[hardtop351]

	Quote: Originally Posted by nicetie
	Craig, It's not as simple as you imagine. The DX7 assigns a switch to each programmable mix. The switch has to be disabled in order to avoid accidental reversing of one control surface while flying. This isn't mentioned in the book or in your post so you may not be aware of it. Ken

hey ken....

if you have a look at your manual you will be able to turn off this switch...you will need to be in progam mix 5 or 6 to do it....but it can be done and very easily. once you are in mix #5 or #6 look for a "SW:" in the centre of the screen but slighty under centre....this is the switch you can either turn on or off or even assign it to another mix. i'm guessing you have the same manual that i'm looking at......but if you don't then send me an email and i can help further if you want

my email is ....hardtop123@hotmail.com

cheers
craig

[TrikeFlyer]

Yep, you are right Craig, got it working with mix 5 or 6 and both trims work.

Now all I need to do is program the weather for flight mode and we are all set to fly this puppy!

Trike

[hardtop351]

very glad to hear trike!!!!...this is exactly what i love so much about this hobby/sport. the ability to help fellow modellers to achieve a common goal. its very satisfiying....even if it is over the internet!!!

cheers
craig

[TrikeFlyer]

Hey Craig, did you receive your new ignition yet??? I just received mine todayjust in time to go flying this week end. The CRRCpro factory included a video showing our new ignitions running on a CRRCpro 26 and as they tested each ignition they wrote our names on each one after running the test. No doubt these ignitions work

Talk about personalized service this is impressive the factory went to all this trouble.
I guess they didn't want any doubt that the new auto advance ignitions work.

Now if the weather will co-operate I can get some photos of ther Laser flying and next week when my digital cam corder arrives I can take some video to post.

trike

[bosshoss]

I got the package as well, and my Extreme Flight Yak-54 68" will fly with this motor.

I will be retarding the timing to 28deg static for the test. At 40 btdc it is still a little too far advanced.

Video will follow after the flight on Sunday, weather permitting.

[CRRCproUSA]

Hi All,
I got the latest Rev of this engine today with the new ignition so I will try to test it fully before the weekend is over. I also have a FuntanaX 100 on the way that I will be using to test this engine - Should be a nice lightweight and inexpensive combination. The goal of this engine is to bring the gas engine flying level closer and to do it with simplicity, reliabilty, and power.

Jim
Western Hobbies
CRRCproUSA

[bosshoss]

I broke in the motor with two tanks on the ground, mounted the cowl, and here is the video.

This is the new ignition I received form the factory, the motor started easily, and ran great.

I trusted it to one of my favorite, albeit beat-up , planes,...the Original Extreme Flight Yak-54 68".

Thumbs up

8700 rpm with a Master Airscrew 16 x 8.

Nice slow speed response, can't wait to fly it on a calm day.


http://www.flyinggiants.com/gallery/...=23166&cat=504

[hardtop351]

	Quote: Originally Posted by TrikeFlyer
	Hey Craig, did you receive your new ignition yet??? I just received mine todayjust in time to go flying this week end. The CRRCpro factory included a video showing our new ignitions running on a CRRCpro 26 and as they tested each ignition they wrote our names on each one after running the test. No doubt these ignitions work Talk about personalized service this is impressive the factory went to all this trouble. I guess they didn't want any doubt that the new auto advance ignitions work. Now if the weather will co-operate I can get some photos of ther Laser flying and next week when my digital cam corder arrives I can take some video to post. trike

yes i got mine and i watched the video too. very impressive stuff.

pity my engine wont run but. ive tried everything...changed carbs....reset all the internals of the carb.....cleaned the plug......carged up a 6v battery to use on the new ignition.....but still it wont run like it should. it coughs and farts and runs like crap. im nearly at wits end.

i did find the the insulator block between the carb and engine has some pulled threads....this may be causing an air leak....will fab up a new alloy adaptor and try again. stay tuned.

cheers
craig

[TrikeFlyer]

Sorry to hear about your troubles Craig. An air leak at the carb spacer is a common problem on these gassers and could definitely cause the symptoms you described.

I would caution you about making a carb spacer out of aluminum though, as it will transfer too much engine heat into the carb thus drying out the gaskets and possibly causing vapor lock.

All engine mfgrs, cars, motorcycles weed eaters etc go to great lengths to insulate the carb from engine heat.

See if you can get a piece of phenolic (linen based is best) or other suitable plastic material to make your carb spacer/mounting block.

Yes, I know regular model airplanes have their carbs mounted with metal, but then they are running alcohol that does not have the high vaporization point of gasoline.

Craig keep us posted of your progress.

trike

[hardtop351]

ohh trust me trike....its VERY tempting to change it to alcohol fuel!!!

cheers
craig

[TrikeFlyer]

After 4 toranados, 50-60 mph winds, rain, floods etc over the past 2 weeks the weather cleared to a bright 86 degrees with 2-5 mph winds this past Saturday

Engine: CRRCpro GF26I 26cc on 87 gasoline with 32:1 Penzoil Air cooled oil Prop used: Hawk 16X8 (looks like XOAR)
Airplane: Sea Gull Laser 200 wing span 69" Wing Area 735 sq in
All Up Weight: 9 Lbs 15.6 oz (no fuel)

Arrived at the field and proceded tostart up the GF26I as usual on my test stand. Turned on receiver, cracked throttle just above idle, choked the carb and flipped 9-10 times with ignition off. Opened choke, turned on ignition flipped 4-5 times and engined started up but would not rev up to full rpm even after a few minutes warm up. NOTE this is first time I attemped to run the engine with the cowl on. Since I didn't put any carb adjustment holes in the cowl yet , I had to remove the cowl to adjust the carb.

With the cowl off I again choked the carb and this time fliped 4-5 times with ignition off. Turned off choke, turned on ignition and fliped 2 or 3 times and it started right up and idled great. Advanced the throttle to wide open and engined reved up to high rpm.

Prefight checked all controls and taxied out. Took off and the engine died about 15 ft high. It sounded lean as it was starting to climb out.

Brought back and richend up the low end and the re peaked the high end. Took off again and this time engine ran good except for a little surge in low end. Flew out almost whole tank of fuel and landed . The engine had plenty of power. Vertical was good for my state of engine tune. Cruise was about 1/8 throttle. Plane handled very nice with this engine.

It appeas my optimum test stand tuning for the best idle and high end rpm left the carb on the lean side so much so that it would not run correctly when I installed the cowl. Then, my field retune was on the rich side and needs to be tweeked a little more leaner.

Sorry i didn't get any video. Just mangaged a couple snap shots. Next week end ( weather permitting as stroms are back today) I will fly again after retuning with the cowl on and switch to a XOAR 17X6 and get some video.

Regards - Trike

[mattbogy]

20mb size limit may not do justice to this awsome video which has it all, even a crash landing.

[TrikeFlyer]

Awsome video Mattboy, I was hoping to get some video of the Laer & GF26I this past week end but if it wasn't raining the wind was blowing 20-35 mph so maybe this next week end will be clear.