inverted O.S. .46 LA problem
 

:mad: got a problem with my inverted O.S. .46LA, it doesn't idle I read some of the forums & lowered the fuel tank till it center line w/ the carb. but I don't think the problem will be solved by just that,so if some one can tell me if mabe there's a glow plug I can use I would really appreciate it :( any advice what so ever. I'm useing cool power fuel 15% w/ a 10x7 prop. & if it matter's any it's in a top flite R/C NOBLER, if I could just get to idle down just enough so it does'nt come in so fast on the landing's. fell free to email me @ ([email protected])

inverted O.S. .46 LA problem
 

Are you saying it won't idle at all, or won't idle slowly enough?
If you're certain that the engine is tuned properly, try a larger prop with less pitch, like an 11-5.

inverted O.S. .46 LA problem
 

Close the air bleed screw down all the way, then open it 1 turn. Keep opening it up till it will idle better.

inverted O.S. .46 LA problem
 

What plug are you using? You won't need a different plug to run the engine inverted. All that is required is the tank to be placed properly and the engine tuned.

You say you lowered the tank, but don't think that will resolve the problem completely. Have you actually run the engine yet?

Some people preach using a Cline Regulator on inverted engines. I have never needed to go that approach, but your findings may be different.

John

inverted O.S. .46 LA problem
 

Next time you're at the field, try and bum a tankful f fuel off of someone else. If it's stll got the problem, then you have to look elsewhere.

inverted O.S. .46 LA problem
 

HI! WELL TODAY I LOWERED THE TANK A LITTLE MORE OR LESS THE CENTER LINE WITH THE CARB. I WAS THINKING OF CHANGING THE POSITION OF THE ENGINE, BUT I WOULDN'T LIKE TO START MAKING HOLE'S IN THE COWL. I'M GONNA TROW EVERY THING BACK ON IT AND TAKE IT TO THE FIELD FINE TUNE IT AND SEE WHAT HAS MORE OR LESS WORKED TILL NOW. OH AND THANK'S FOR THE HELP GUY'S :)

inverted O.S. .46 LA problem
 

I was having trouble w/ my .46LA (inverted) loading up until I drilled out the air bleed hole to 1/16" and got some adjustability back...Before, I had the screw so far out I thought it might fall out! Now it idles really well, and transitions great!

RE: inverted O.S. .46 LA problem
 

Here it is boys!! GO A LITTLE BIGGER AND SHE WILL IDLE 3 - 3-1/2 MINUTES before starting to load up and will still respond to a sharp throttle movement to save it from dying. AND if you shut it off it will start back up without pulling the plug (A3) to clean it.

INVERTED OS 46LA (as well as upright I would assume)

The 1/16" drill got me started in the right direction but the screw was still backed out past the hole. Sooooo...........

Use a #49 ( .073" ) drill bit and set the screw out 6-1/4 turns. The 1/16" drill was .010" larger than the original opening of .053" so I went another .010" on top of that out to .073" and now the screw is slightly blocking the hole thus actually giving some up/down adjustment. With this arrangement my U CAN DO 3D 46 idles away while sitting still on the runway.

This should cover any instances I can think of as normally it wouldn't be idling that long anyway, on the ground or in the air.

Also I now close the high speed needle as soon as I shut the engine down and re-open it to the previous setting just before starting. This seems to eliminate any starting problems due to flooding.

My opearating temperature was 190-200 degrees F when idling. I didn't Tach it but as long as it is idling and not rolling I am HAPPY. Oh yeah and during my test of these settings my engina ran for 55 minutes. After starting I revved for about 30 seconds the threw it to idle for 2 - 3-1/2 minutes until it started to load up then revved for 30 seconds to a minute to clear then repeated the idle. I did this over and over for 55 minutes and finally shut it off myself and still had a bit of fuel in the plane (8 oz. tank). WOW. That time frame will certainly change during flight but who can stand there staring up for a solid hour anyway.

I believe this motor has had this problem all along I just didn't notice it on the other plane it was on. I think Os needs to check their design and just open that hole up at the factory and maybe so many people wouldn't complain about these motors. The trainer I had this motor on previously was a symmetrical high winged plane with no dihedral and this motor pulled it around great doing knife edges, rolls, loops, and inverted flight. It also never failed to start until I started setting the idle low enough for it to set still on the runway. Just a hair above that and this thing was always great. Now it will be even better.

I am looking forward to getting to the field as this alteration should have increased performance as well. We'll' see.

The plane:

Great Planes U CAN DO 3D 46, with OS 46LA (inverted), 6 servos (2 elevators, 2 ailerons, 1 rudder, 1 throttle), utilizing flaps and ailevator control through the HITEC OPTIC 6 Radio system.

RE: inverted O.S. .46 LA problem
 

I agree with Vinnie, I have an OS la 40 and I run a 11-5 or 11-4 and my plane can slow down for perfect landings. The large diameter props with little pitch give more climbing authority as well.

RE: inverted O.S. .46 LA problem
 

Oh yeah forgot that. It also has a 11-3 APC Prop on it.