My Raptor cuts out.    Gallery
View related threads: (in this forum | in all forums)

Logged in as Guest



Users viewing this topic: none
    Search This Thread  
 
Printable Version

All Forums >> RC Helicopters >> RC Helicopter General Discussions >> My Raptor cuts out.
Page: [1]

Tower Hobbies Get Coupon Codes Brands  
Login
Message << Older Topic   Newer Topic >>
My Raptor cuts out. - 5/24/2012 4:24 PM   
heli-john



Posts: 415
Score: 100
Joined: 10/8/2004
Last Login: 4/6/2013
From: birmingham, UNITED KINGDOM
Status: offline 		I'd had lots of trouble getting it to start - Raptor V2 with TT Pro 39 - but finally it seemed to be doing OK. Bit iffy on needle settings but basically hovered nicely in the back yard. It is a ARTF kit I'd bought from a chap last year who hadn't been able to assemble it so all new. The motor is a pain and I know people say junk it but it was new and an OS don't come cheap. I finally got it running, then had a gyro problem which got sorted in the backyard and put it away for months waiting for a time like now.


After not messing with it for months I took it to the farm I use and it fired up fairly well. First time with it on the wide open space. Kept it low as it is the first flight and put it on the ground.
Problem is it just cut out when on the ground. For the first few minutes it is fine. I didn't want to be too adventurous as it is the first time out on the field with it but I put it on the ground after say 5 mins of settling in and it cut. It then started to cut before I could take it to my flying area.

I will admit one time it cut because the glow plug came out. So embarrassing. Even after a not doing anything with it for a while I did expect to get a tank of flight out of it this time.

I think it was hot but can't say it was running weak particularly. So what's up with it? I'd love an OS but can't outlay that sort of money now. Anyway, it fires up nicely and runs ok............for a while. I know it smacks of needle adjustment but I can't get it to react differently even after a needle twiddle. It just cuts.

_____________________________

You can if you think you can!

Hide Signatures
       Post #: 1

RE: My Raptor cuts out. - 5/24/2012 4:46 PM   
ATVAlliance



Posts: 861
Score: 113
Joined: 3/8/2010
Last Login: 5/23/2013
From: , WV, USA
Status: offline 		Sounds like its in your low end.

Or if it starts, idles, revs up to full and back down again to idle when you first start it...then after a while you start to see these symptoms, it could be a heat issue and introducing a leak or low compression.

Could be as simple as a glo plug too.

Im not that up on nitro engine tuning...I can do it somewhat, but still always ask for more experienced peoples help at the field to "fine tune" my tune.

Im sure some nitro guys will chime in here soon enough and give you a list to go through to sort this issue.  Ive never owned a TT engine.  My Raptor 50 has the OS Hyper 50 in it and I havent touched the needles and it runs, idles, flies fine with the settings whomever built it did on the tune.

goodluck

_____________________________

SpeedDemon
ATVAlliance.Com

Hide Signatures

(in reply to heli-john)
       Post #: 2

RE: My Raptor cuts out. - 5/25/2012 7:55 PM   
chris6414



Posts: 768
Score: 100
Joined: 12/23/2004
Last Login: 4/2/2013
From: Sneads Ferry, NC, USA
Status: offline 		LS sounds lean turn it out 1/2 a turn. Set the HS to whatever the factory recommends. Start it up then spool up to about 30% to get her warm. If is sloppy rich with lots of smoke, then turn the LS in a 1/8 of a turn. Come back ti idle and see if it will idle. Pinch the fuel line and listen for the motor to speed up, then let go. It should idle for 3-5 seconds before it climbs. If it takes longer than that then tunr the LS in a little more. This will get you close. once the pinch test is OK. You should be able to idle for 30 seconds smoothly then transition to hover speed. A little rich is OK and better for the motor. If it revs right up and it cackles when you pull it back to idle then the LS is too Lean.

Hide Signatures

(in reply to ATVAlliance)
       Post #: 3

RE: My Raptor cuts out. - 5/25/2012 8:23 PM   
heli-john



Posts: 415
Score: 100
Joined: 10/8/2004
Last Login: 4/6/2013
From: birmingham, UNITED KINGDOM
Status: offline
quote:

ORIGINAL: chris6414

LS sounds lean turn it out 1/2 a turn.



I tried making it richer at the field but it seemed not to help. I messed around a fair bit but it got so no matter what I did it wouldn't run long enough to do a pinch test and after half a dozen cutting outs I gave it up.

TBH, I am tempted to bin it and get an OS.

_____________________________

You can if you think you can!

Hide Signatures

(in reply to chris6414)
       Post #: 4

RE: My Raptor cuts out. - 5/25/2012 11:03 PM   
BarracudaHockey



Posts: 18366
Score: 280
Joined: 7/13/2003
Last Login: 5/23/2013
From: Jacksonville, FL, USA
Status: offline 		The best thing you can do to tune a TT 39 is to remove it and install an OS37

_____________________________

Andy - Helicopter Forum Moderator
AMA 77227 Leader Member- Contest Director
www.JaxRC.com

Hide Signatures

(in reply to heli-john)
       Post #: 5

RE: My Raptor cuts out. - 5/25/2012 11:24 PM   
heli-john



Posts: 415
Score: 100
Joined: 10/8/2004
Last Login: 4/6/2013
From: birmingham, UNITED KINGDOM
Status: offline
quote:

ORIGINAL: BarracudaHockey

The best thing you can do to tune a TT 39 is to remove it and install an OS37


I can go to an OS32!! Will that do!!

_____________________________

You can if you think you can!

Hide Signatures

(in reply to BarracudaHockey)
       Post #: 6

RE: My Raptor cuts out. - 5/25/2012 11:26 PM   
BarracudaHockey



Posts: 18366
Score: 280
Joined: 7/13/2003
Last Login: 5/23/2013
From: Jacksonville, FL, USA
Status: offline 		37 is better, the 32 barely gets out of its own way

_____________________________

Andy - Helicopter Forum Moderator
AMA 77227 Leader Member- Contest Director
www.JaxRC.com

Hide Signatures

(in reply to heli-john)
       Post #: 7

RE: My Raptor cuts out. - 5/30/2012 2:16 PM   
chris6414



Posts: 768
Score: 100
Joined: 12/23/2004
Last Login: 4/2/2013
From: Sneads Ferry, NC, USA
Status: offline 		32 is plenty powerful enough. I do loops and rolls with my Hawk Sport that is 12 years old. Better mileage too. I have tuned a .39 and was a bit more difficult than the .32 I have but doable. Setting the HS to stock then the LS to stock, it should run. Once running it need to rev up to clean it out to see where your at. Then you can set your LS to where it needs to be.

Hide Signatures

(in reply to BarracudaHockey)
       Post #: 8

RE: My Raptor cuts out. - 6/17/2012 12:23 AM   
heli-john



Posts: 415
Score: 100
Joined: 10/8/2004
Last Login: 4/6/2013
From: birmingham, UNITED KINGDOM
Status: offline 		I got rid of it; just gave up on it.

I bought a used OS32 and it started up relatively painlessly. I'd reset it to factory settings. It ran for about a minute and stopped but after a little tweaking it ran fine. Took it down the backyard to the grass to try it out and it cut out. Tweaked the jets some more and it ran fine, was about to lift off and it cut. Went to tweak the needles some more and found the carbie was loose. One of the screws had come right out and lost in the grass.

I am guessing it worked loose and each time I tweaked the needle it compensated for the air leak until the screw finally fell out.

Here's the good bit, I found the screw in the grass, whacked it back on and the engine ran a treat. When the awful wind and rain stops I can try it again.

_____________________________

You can if you think you can!

Hide Signatures

(in reply to chris6414)
       Post #: 9

Page:   [1]
All Forums >> RC Helicopters >> RC Helicopter General Discussions >> My Raptor cuts out.
Page: [1]





Jump to:


 
Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

RC Universe is a service of Internet Brands, Inc. Copyright © 2001-2013.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America


0.344RCU1