RustyTumbles

Hi all,

I am after some feedback on the new CRRC pro GF45i? This engine is new here in australia and I was looking at fitting on up to my WM extra. One guy at my club has one in a wild hare edge and it seems to run fine but his flight time has been limited. I am after info on props used and realiablity, tunning issues etc.

Birddog-RCU

My Feedback: (62)

Bigsport, do you have a website for this engine and manufacturer? I don't think I've ever heard of it.

RustyTumbles

Have a look here:

http://www.sussex-model-centre.co.uk...ngine-5160.htm

They are new on the market here in australia, not sure how long they've been selling else where. The are selling for about $600 AUD with inverted pitts muffler here. The one at my club is currently swinging a bolly carbon 20x10 at 7200rpm, and its only had about 4 tanks of gas through it. They look the goods I'm just concerned about realiability and after sale service etc.

airbatic2000

I'm also interrested in this engine as a cheap entry into gas engines. I'll bump this thread to see if anyone has had more experience now.

Thanks.

TooLy

HI All,

I have one GF45I currently running on a stand to finish break-in.
It was advertise here on RCU:
http://www.rcuniverse.com/forum/m_24...tm.htm#2403088

I have only 1 hour of running and it's working great, i'm using now 1:25 mixture so it's very rich.
Spining 20x8 with ease, I think it's over 7000 but I will tach it today, overall seems very nice, idle very low, throttle transition is very quick at this mixture.

TBM will have them too:

http://www.troybuiltmodels.com/EngGF45i.htm

I spoke to the manufacture and he gave me full support, I bought it in Israel and I can get spare parts if there is need (not in stock, I have the pdf file of the parts)
No problems with tunning or anything else.

bigsport,
I would like to know how it's pulling the WH Edge, 7200 on 20x10 is very good.
I think it can handle a 22x8 after finish break-in, tbm says 21x8.

TooLy

Well, I got my new tachometer today and after 3 hours of running I got 9200 rpm with zinger pro 20x8 at 1:25 mixture.

RustyTumbles

WOW!!! Put a bigger prop on it!!!!!! How is it running now? The guy at my field is having trouble with his now, not sure if it is just not tuned properly or what. I'll ask him tomorrow.

TooLy

I will try a bigger prop, I had some trouble too but with a new spark plug that didn't worked good, I'm still trying to find the right plug fo it.

airbatic2000

Tooly,

20*8@9200 should be about 6 or 7 HP!! [X(]

Are you sure your tach is right??

TooLy

I measured that a few times and that's what I got, and it also sound like high rpm.
One thing i can say, the engine has no problem at all to spin this prop, throttle transition from idle to full is immediately.
The tachometer is ok too.

RustyTumbles

I like the power of this engine. It hovers my mates WH edge at half throttle. What concerns me is the reliablity of the engine and if it is posible to set and forget the needles. My mate was running 25:1 oil ratio and it sounded sick. So we pulled the plug and it was all fouled up. So we cleaned the plug and put some of the 40:1 fuel I run in my zenoah and retuned it. It ran better but still a little off. I think maybe the bottom end was a little rich, also I think some problems are comming from the side mounted carb hanging out in the breeze. I'm not sure if he is going to continue using the motor or pull it off. I may get it off him if he does take it out. Maybe a few mods will havi it running better!!!!!

TooLy

Mine runs great, with almost 1:20 and hotter plug is also make the plug dirty, so I closed the low needle 1/4 turn and was much better.
I have now more than 3 hours of running, so next time I will test with 1:32 mixture.
You know the weight of your mate's WH ?

RustyTumbles

About 16lbs I think. He has now pulled the motor out as he is fed up with it. Not sure why he pulled it out it seemed to be running ok after we changed fuel and tuned it. I might make him an offer on it and put it in my extra.

Has anyone had any drama's with it running backwards? I know my mates does occasionally fire and run backwards......

TooLy

So you say it hover your mates WH at 16 lbs ??? sounds good.
Running backwards ??? the starting is very easy by hand.

RustyTumbles

Yeah sometimes when you flick it, it bounces back off compression as it fires so it begins to run backwards. You just stop it and start try it again. Have you put the engine in an aeroplane and flown it yet??

RustyTumbles

crrcpro,

did you get my email?

RustyTumbles

What size battery are you guys using for ignition? Troybuilt says it's 6v, how many Mah should be used?

Also troy built say it is fixed advance. What does this mean exactly?

Crusty

bigsport, it means the ignition unit does not retard at low rpm, so starting is a bit harder and idle a bit lumpier
Also it may contribute to backwards starting,...check the timing in case you have too much advance

RustyTumbles

How do you check the timing? I though all electronic ignitions had a auto advance and retard to permit easy starting?? Could this relate to a burbly mid range or would that just be a rich low needle?

TooLy

It's doing the same to me, when I want to start it at the first time with choke, but it can't run backwards because my hand is there.
It's still on a stand, I'm waiting for new some new models my lhs is about to get.
I'm using 6V 2000 mah, you can use small one too.
Fixes timing means the spark come at the same point for all rpm range, all engines today are fixes timing except brison and fuji, they have auto advance ignition (mechanical in brison) that change the timing of the ignition according to the rpm.
What spark plug do you have ? did anyone touched the timing ?
The basic adjustment is 1.5 for the high and low needls, try to close the low 1/4 turn.

Octopus RC

My Feedback: (2)

The voltage of supporting the ignition to work normally is 4. 8-6. 0 And 6.0v is the best choice. We generally use battery of 2200mah as the ignition`s battery, in China .Because the 2200mha can be enough to let you fly a few dozen rise and fall .

Octopus RC

My Feedback: (2)

Hall of inductor had been fix on correct position so accurate already before the engine is dispatched from the factory .So generally speaking it is the position that did not need to change Hall's inductor

airbatic2000

I believe most engines using total loss electronic ignitions today, has variable (microprosessor controlled) timing. At least the european makes has.

RustyTumbles

Well I just got a deal on the engine my mate was using. It will be going into my world models extra. I plan to have a good look over it and check everything. I don't think the timing has been touched. I think to biggest problem is the tuning. Once it is in the model I'll readjust the needles and see how it goes.

How many flights could I get on a 1100mAh 6v pack? It won't be going flat out all the time. I'd say about half throttle for the most part. I normally fly for 10-15 min.

TooLy

The ignition take something like 300-400 mah continuous, so 1100 should work for 2+ hours
I've been running mine on a stand for 2.5 hours with 2000, and a week before for 1 hour at the same charge.