hirobo shuttle plus cutting out

[beginer]

Can any1 help???
i have just built my first heli and have a webra 35 engine in it , I have got a pro to set up the radio gear for me and start the engine, he told me to run the engine in with two or three tanks of fuel, the first tank went through okay but the next day the heli didnt want to start, it seems as if it doesnt want to turn.
I eventualy checked found the glow plug was not working so i replaced it and after a bit the heli started but when i take the glow starter off the engine cuts out and i cant get a hold of the pro.can any1 suggest anything plz!! :?

[Bender]

Is there raw fuel comin out the muffler ?, although rich is good to a point, if its too rich it will blubber and die when you remove the glow, generaly he mixture requirs leaning a touch as the engine breaks in.
Im not familiar with the adjustment range of the webra carb, hopefully someone can chime in here, but I would try a 1/8th turn in on the Idle mixture screw, usually located opposite the main needle.
If it revs up a lot and the smoke reduces greatly, then youve gone too far in and need to back out some
note..on most heli engines the idle mixture has an effect up to half throttle
hope this is some help

[Quattro]

not using a webra engine before im not sure but usually the low end is factory set ive never needed to adjust any on my os engines if it didnt want to turnover when you tried it sounds like youve got fuel going into the carb when filling the tank wich will cause it to lock up un til you remove the glow plug

[Bender]

Just so as not to miss what might be obvious, have you moved the throttle trim?

[beginer]

Is there raw fuel comin out the muffler ?, although rich is good to a point, if its too rich it will blubber and die when you remove the glow, generaly he mixture requirs leaning a touch as the engine breaks in.
Im not familiar with the adjustment range of the webra carb, hopefully someone can chime in here, but I would try a 1/8th turn in on the Idle mixture screw, usually located opposite the main needle.
If it revs up a lot and the smoke reduces greatly, then youve gone too far in and need to back out some
note..on most heli engines the idle mixture has an effect up to half throttle
hope this is some help

Hi there if raw fuel comin from the muffler, and i have reduced the mixture several times very slowly bit by bit and when it does run there is not a lot of smoke, since posting last post i have found that the second glow plug doesnt work now , so will have to wait till morrow to get new one, what causes glow plugs to burn out so fast?

[beginer]

Just so as not to miss what might be obvious, have you moved the throttle trim?

hi thanks but thats one thing i didnt forget to do i have the throttle trim set to almost fully up on the tranny, the pro set the heli and tranny up and it was running perfect untill i tried the next day.

[Bender]

Its not unusual to eat a plug when running in, they pick up metal debris, but on the other hand, if you lost two in quick succession, it could also mean that you went too lean, sorry to sound confusing, but its hard without seeing/ hearing the engine run.
It might be better at this stage to wait till you can get someone with experiance to set it up as running too lean will damage your engine

[Jamez]

You are not using a 2 volt glow starter and 1.5 volt (or whatever they are) plugs, as this will cook them rapidly.

[Quattro]

Make sure your not plugging the glow lighter into the starter plugs
belive me plenty have dunnit including me ops:

[Raptorite]

Hi Beginner,

I have run in and tuned a good few webra engines, they are a bit of an oddity to break in.

The most important thing to consider with a Webra, is that unlike OS, if you make changes to one needle, you also need to make the opposite change to the other to maintain any sort of smooth and consistent running. For example, in your case you will be thinking about leaning out the top needle a little at a time as you break in the motor. In this instance, each time you lean the main needle by a click or two at a time, you will also need to richen up the idle needle by the same amount. Conversely, if you richen up the main needle, you will need to lean out the idle needle by an equal amount.

This is because in all glow motor's OS and Webra included, the idle needle only allows a percentage of the main needle's flow rate into the engine at lower revs, so in this case if you have the idle needle set such that the engine starts and ticks over nicely, if you then lean out the main needle by a couple of clicks, you will need to also richen up the idle needle so that the same amount of fuel flows into the engine at tick over and in the lower RPM range. Webra's are just far more sensitive to this adjustment than others.

The other thing which is more critical with Webra motors is leaks in the exhaust manifold where it mates with the exhaust port on the engine. Check to see if there are any signs of leaks around it, particularly at the bottom. If there are, I would suggest you get hold of some alloy gaskets which are available at most model shops and online from places like Quick UK etc. Smear some high temperature silicone on both sides of it and put it in between the motor and exhaust. This will both seal up any small gaps there might be between the two and also act as a bit of an adhesive making sure the exhaust manifold remains tight on the motor.

The best way to tune webra motors is to always start with the main needle, as we mentioned earlier the idle needle setting is dictated by the main needle. Set it so the model hovers reasonably well with a good smoke trail from the exhaust and runs smoothly. Once you have achieved this, do the "pinch test" to set the idle needle correctly.

If you are not sure what this is, with the motor ticking over at idle, pinch the fuel line with either a cut off clip or your fingers, what you should expect is for the motor to run normally for around 3 seconds, then rev up a little as it leans out and then stop.

If it starts reving up imediately, it is too lean, conversely if it runs normally for more than 3 seconds it is too rich. Test and make adjustments as required to get it right.

If as you mentioned you are popping glow plugs, this is indicitive of an engine being too lean, therefore causing the plug to get too hot and blow. To start you off tuning the main needle, I would suggest you richen it about half a turn from where it is now and start leaning it a little at a time from there until you get a nice consistent run with a nice smoke trail from the exhaust.

I hope this helps.

Cheers,

Pete.

[beginer]

Make sure your not plugging the glow lighter into the starter plugs
belive me plenty have dunnit including me ops:

thanks for info but im using same plugs as got with engine and using a remote glow starter not the one on the power panel,I think the mixtures were wrong and 2 faulty plugs, got it started okat today after putting in a enya no 3 plug

[beginer]

Hi Beginner,

I have run in and tuned a good few webra engines, they are a bit of an oddity to break in.

The most important thing to consider with a Webra, is that unlike OS, if you make changes to one needle, you also need to make the opposite change to the other to maintain any sort of smooth and consistent running. For example, in your case you will be thinking about leaning out the top needle a little at a time as you break in the motor. In this instance, each time you lean the main needle by a click or two at a time, you will also need to richen up the idle needle by the same amount. Conversely, if you richen up the main needle, you will need to lean out the idle needle by an equal amount.

This is because in all glow motor's OS and Webra included, the idle needle only allows a percentage of the main needle's flow rate into the engine at lower revs, so in this case if you have the idle needle set such that the engine starts and ticks over nicely, if you then lean out the main needle by a couple of clicks, you will need to also richen up the idle needle so that the same amount of fuel flows into the engine at tick over and in the lower RPM range. Webra's are just far more sensitive to this adjustment than others.

The other thing which is more critical with Webra motors is leaks in the exhaust manifold where it mates with the exhaust port on the engine. Check to see if there are any signs of leaks around it, particularly at the bottom. If there are, I would suggest you get hold of some alloy gaskets which are available at most model shops and online from places like Quick UK etc. Smear some high temperature silicone on both sides of it and put it in between the motor and exhaust. This will both seal up any small gaps there might be between the two and also act as a bit of an adhesive making sure the exhaust manifold remains tight on the motor.

The best way to tune webra motors is to always start with the main needle, as we mentioned earlier the idle needle setting is dictated by the main needle. Set it so the model hovers reasonably well with a good smoke trail from the exhaust and runs smoothly. Once you have achieved this, do the "pinch test" to set the idle needle correctly.

If you are not sure what this is, with the motor ticking over at idle, pinch the fuel line with either a cut off clip or your fingers, what you should expect is for the motor to run normally for around 3 seconds, then rev up a little as it leans out and then stop.

If it starts reving up imediately, it is too lean, conversely if it runs normally for more than 3 seconds it is too rich. Test and make adjustments as required to get it right.

If as you mentioned you are popping glow plugs, this is indicitive of an engine being too lean, therefore causing the plug to get too hot and blow. To start you off tuning the main needle, I would suggest you richen it about half a turn from where it is now and start leaning it a little at a time from there until you get a nice consistent run with a nice smoke trail from the exhaust.

I hope this helps.

Cheers,

Pete.

Hi Pete,

Thank you for intensive input, Managed to get hold of the instructor/pro and he put in a decent plug(enya no 3) and after about 1hour got it running and the engine tuned, he admitted himself that it was a bit harder to set up than the O S engine,he has also set up the rest of the heli and i took my first flying lesson with him tonight, but i think i will buy a simulator as flying is harder than what i thought and dont want to crash 5 mins after getting set up.
Can anyone suggest a god simulator that i can use also a lead that i can plug into my swana rd6000 tranny.

thanks

[Raptorite]

Hi Beginner,

I am glad you got the motor running and tuned, and the rest of the heli setup into the bargain.

There are a few simulators around that will help no end in learning to fly, the most common ones are Reflex XTR, Realflight G2 and the new G2, and one other would be Truflight, which is also very good.

Having said that, I would stick to the commonly used simulators, as it means that you can download lots of different models and more importantly when you are learning, you can also download recorded flights from other people which will be useful in seeing how the model should be flown so you can copy it.

Some simulators like the Realflight G2 and G3 for instance have the ability to join groups of other people and fly together across the internet, which would also be very useful in picking up tips on learning to fly.

I hope this helps.

Cheers,

Pete.

[beginer]

Hi Beginner,

I am glad you got the motor running and tuned, and the rest of the heli setup into the bargain.

There are a few simulators around that will help no end in learning to fly, the most common ones are Reflex XTR, Realflight G2 and the new G2, and one other would be Truflight, which is also very good.

Having said that, I would stick to the commonly used simulators, as it means that you can download lots of different models and more importantly when you are learning, you can also download recorded flights from other people which will be useful in seeing how the model should be flown so you can copy it.

Some simulators like the Realflight G2 and G3 for instance have the ability to join groups of other people and fly together across the internet, which would also be very useful in picking up tips on learning to fly.

I hope this helps.

Cheers,

Pete.

Thanks Pete, I will look into the real flight as a few people have suggested that now.
Thanks again