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Gasser Model RC Helicopters > My Spectra arrived - Cracked canopy and all!

Eury
rrProfessor
Location: Ankeny, IA, USA.

BTW, where did you get your counter things, Raja?

Nick Crego
Still wanted by the government, I survive as a soldier of fortune.

06-27-2008 09:34 PM

rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

From Autozone but way back when

It used to be Auto Palace or even some other name before that. They were called "mileage minders" which you set to the current odometer reading to remind you when to change oil next. Cheap, like a couple of bucks each at the time.

I use the more expensive voltmagics rather than the voltwatches as the LEDs are stable and don't jump around when you move servos like the voltwatch ones. I'll send you a PM about those.

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator

06-27-2008 10:22 PM

Eury
rrProfessor
Location: Ankeny, IA, USA.

Sadly, no flight today, it wouldn't start. Wouldn't even pop. I don't think it's getting a good spark, I'm going to mess with it tonight. I can tell you it's not the plug or carb, I swapped those from my other heli, and it didn't make any difference. I'll report back after I've had a chance to troubleshoot.

My buddy did bring me one of those C-volt thingies for the heli. Pretty neat little digital voltage display for the side of the heli.

Nick Crego
Still wanted by the government, I survive as a soldier of fortune.

06-28-2008 02:08 AM

Eury
rrProfessor
Location: Ankeny, IA, USA.

Hmm, dunno. Good spark, the plug is wet, I'm fairly certain that I'm in an environment with air, the needles are where they should be. Bizarre.

Nick Crego
Still wanted by the government, I survive as a soldier of fortune.

06-28-2008 02:23 AM

xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

Quote
I'm fairly certain that I'm in an environment with air,

Are you sure???

One thing you might look at is to see if the flywheel magnuts, are at the right spot when passing the coil,, Someone might have missed the Key to hold it in place,, Should be pretty close to TDC, an easy check,, just line up the second magnut with the coil pickup, and take the spark plug out to see it it's at top dead center,, or close,, That all I can think of??? XGM/VGM

John Crotts
www.soonerhelicamproductions.com

06-28-2008 03:07 AM

HOMEPAGE

Eury
rrProfessor
Location: Ankeny, IA, USA.

Fairly certain, although if there's no air, it would explain this light headed feeling.

I'll look at that, I'm kinda baffled otherwise. Only problem is I have to pull the engine to check it, if I'm thinking right. I bought this engine from RR from an MA team pilot. This isn't the first issue I've had with it, so the fact that it isn't starting doesn't really surprise me, it definitely ISN'T what was described.

Nick Crego
Still wanted by the government, I survive as a soldier of fortune.

06-28-2008 03:15 AM

rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

I know you may have already tried this, but

Turn on the tx/rx.
Set throttle to idle, if not sure give it 3/4 trim no more.
Set both needles to 1 3/8.
Push primer bulb several times until the carb bulb fills with fuel.
Choke on.
1 good pull on the starter (no more).
Choke off.
1 good pull and it should be running.

It should start that easy. If it doesn't check for spark. Take out the spark plug (or use another one), ground it on the engine and pull the chord to see if you see any spark. Note if you do it will be pretty faint, but if its there its good enough. If not try swapping the coil from your Predator, see if that helps before you go drastic and pull the whole motor.

Good luck and let us know what you find,

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator

06-28-2008 04:08 AM

Eury
rrProfessor
Location: Ankeny, IA, USA.

I know all of that, and swapped components from the Pred. None of it helped. I pulled the motor and I'm doing some things that needed to be done to the motor and checking it all out. Good news is it's simple to pull the motor form the thing. Man, it takes forever on the Pred. This was out in 5-10 minutes.

Nick Crego
Still wanted by the government, I survive as a soldier of fortune.

06-28-2008 04:21 AM

xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

Quote
Only problem is I have to pull the engine to check it, if I'm thinking right.

Well isn't the source pick up in the back of the the engine, you might be able see the magnuts comming around, by lookin in the corner of the engine block, where the source coil pickup is???? not for sure but I think you could see the magnuts comming aroung there?? It would sure be worth the effort, if you don't have to pull the engine,, I have seen Keys break before, it's rare,, I have even seen the Key's that are offset to change the timming break before,, To me if it's not fireing, and you got fuel, and spark, then the timming is off??? Just my thoughts,, I hope you get it lined out... XGM/VGM

John Crotts
www.soonerhelicamproductions.com

06-28-2008 04:23 AM

HOMEPAGE

xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

Well I guess you have it out allready,, so it will be easy to see,,

Dang,, your quick,

, XGM/VGM

John Crotts
www.soonerhelicamproductions.com

06-28-2008 04:24 AM

HOMEPAGE

rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

Yes the frame does split easily :)

If the motor doesn't start than another issue could be low compression. If its a used motor that you don't know the condition of, it could be the reason. Really its not a whole lot more. Is it possible the carb is not pumping because the hole to the cylinder is blocked with something, like silicone rtv? Just thinking for you...

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator

06-28-2008 04:26 AM

Eury
rrProfessor
Location: Ankeny, IA, USA.

I'm working on it. I'm actually replacing the crankcase of the engine, I need to make a puller of some sort to get the rotor/flywheel off, mine doesn't fit. I'll have it all apart tomorrow and figure it out.

Nick Crego
Still wanted by the government, I survive as a soldier of fortune.

06-28-2008 04:30 AM

xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

Cool,, Good luck,,

XGM/VGM

John Crotts
www.soonerhelicamproductions.com

06-28-2008 04:32 AM

HOMEPAGE

Eury
rrProfessor
Location: Ankeny, IA, USA.

Thanks. Everytime I buy a gas engine used, it's never even close to the stated condition. Once I bought a 3w 106 that took $350 in repairs to make right, and now this. When I sell something, I'm honest about the condition and describe it accurately, and if the person isn't happy, I take it back. Unfortunately, not everyone follows that same example.

Nick Crego
Still wanted by the government, I survive as a soldier of fortune.

06-28-2008 04:45 AM

rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

Replacing the crankcase?

Sounds drastic but you know what you're looking at, not us here.

You can drill holes into a steel plate and get some long screws to go through the plate and screw into the flywheel. Tighten them evenly and the plate will push on the crankshaft end and pop the flywheel off. I used some old car screws from my parts box, left over from my first car, a Chevrolet Citation

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator

06-28-2008 04:49 AM

xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

Quote
I'm honest about the condition and describe it accurately, and if the person isn't happy, I take it back.

Wouldn't it be great if everyone did!!! I have been down that road before, and it sucks, Period,, It's a shame that people think they can say, and sell anything with out any remorse!!! But life is a wheel, and what comes around, goes around, full circle,, Sooner or later, mostly later,, but it comes, never the less..

Well agian,, I hope you get it lined out, and it doesn't cost you much!!!! XGM/VGM

John Crotts
www.soonerhelicamproductions.com

06-28-2008 04:51 AM

HOMEPAGE

Eury
rrProfessor
Location: Ankeny, IA, USA.

That's the plan, I just don't have any screws that fit here.

The story on the motor is this. I bought it from the classifieds (good feedback and the proverbial 2 gallons through it, etc etc) for $300. It got here and sat in the box for a month, and when I went to install it in the Spectra, I noticed that the bottom of the crankcase where the screws mount was bent. So, it was impossible to get level. Contacted the seller, and naturally was told that it was perfect when it left his house. (Sure it was, the FedEx guy must have been the one to bend it.

) I ordered a new case, gaskets, etc early this week, and improvised by doing some grinding and shimming to make it sit level in the heli, always with the intention of pulling the engine after the test flights to replace the case. I generally do a pretty thorough tear down and inspection after the first few flights on a new airframe to check for problems anyways. The parts were cheap, about $30 total.

So, I've got all the new parts here on the bench, the engine not running gives me a chance to swap the case and figure out what the problem is. I've rebuilt a lot of engines, so I'm comfortable doing the work, and I'll be able to have a better assessment of what the condition is after I get the rebuild done.

Nick Crego
Still wanted by the government, I survive as a soldier of fortune.

06-28-2008 04:58 AM

rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

OK I understand now why you're changing cases

Well there is nothing super hard about it, I've built an engine from parts before and made it an airplane motor to put it into my taylorcraft. Once you get by popping the flywheel off, its just 4 screws behind it and the crankcase is apart.

Now going back to why the crank is bent, I guess he crashed it eh? Hopefully the crank isn't bent but you checked that already if I remember right when you mounted the fan.

When its apart if you can rebuild it with another red coil on the flywheel to see if that is the problem (why it won't start). Maybe you can swap coils with another motor that you have, and if it starts then you just buy a new coil and put it back on the other motor -- just a thought.

Good luck with it and hope you get it running soon!

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator

06-28-2008 05:11 AM

Eury
rrProfessor
Location: Ankeny, IA, USA.

Thanks, yeah, I checked the crank, it's fine. I've never taken a Zenoah apart before, but from the diagrams and the other gas engines I've done, I should be able to change the rear case without removing the fan and having to dial it in again. At least, that's my hope. It probably won't work out that way, but I'm going to continue with my happy thoughts until proven wrong.

Nick Crego
Still wanted by the government, I survive as a soldier of fortune.

06-28-2008 05:18 AM

rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

Did you find a metal plate to drill through it and make a puller?

The screws I believe were 10mm driven, mm size for sure. I forgot where they came out of from the car, I want to say they were valve cover screws but I can't remember for sure. Haven't found anything that fits into the flywheel threads yet?

On a side note Hanson sells a fan puller plate, check out his website under parts and accesories at the bottom of the page.

You should be able to get the rear case out without taking the fan out of the front half of the crank. Whatever you do, DONT DONT DONT hold the front of the crank/fan while trying to unscrew the rear dogbone for the pull starter. The crank is in two HALFS and you'll twist it and it won't be true any more. Always use a piston stop to do this instead.

Also, never insert an allen wrench into the threaded hole in the fan to stop it from rotating while trying to unscrew the dogbone. I read about this method before and broke a piece off the threads of the rotor trying to do this. The piston stop is the right answer for the job.

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator

06-28-2008 05:33 AM

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Gasser Model RC Helicopters > My Spectra arrived - Cracked canopy and all!

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