Hi all,

sorry about all these questions but I have yet another one with my Hong Nor X1X CRT .28 SH Nitro engine.

I have now managed to get the servos to behave but I am blowing glow plugs nearly everytime I go out.

Tonight I did 4!!!!

Not only is it getting expensive but also very very annoying!

As I have said before I am used to nitro engines in helis and planes which rarely blew a plug.

I have used OS 10 (A5) OS 8 and LC3's

In the manual it recomends an OS no.8 which I blew 3 of this evening and an OS A5

The engine was running at 170 F so not that hot my mates Trophy runs at 230!!F and never blown a plug from new.

Could it be the tuning or fuel I have richened up the low needle and high speed needle and the performance is not that great compared to my mates Trophy he leaves me standing on acceleration and top speed it still pulls away from mine, I have a fair amount of smoke low end and very little if none at high end but am still blowing plugs.

Any advice would be very welcome.

I am using Byron 25% Nitro car fuel

Do you mean a glow plug or a glow plug igniter? :P

:P Glow Plug

I thought in the summer and with a high nitro content in a .28 engine an A5 or OS8 should be fine but no, and I just dont understand why?!?

what mAH is your igniter?

and how long are you leaving your igniter in before you start it? put it in, and leave it in no more that about 5-12 seconds, if your engine doesnt start first time, take it out and leave it a minuite before putting your glow plug back in again. But have you recently changed your fuel? you may need to re-tune your engine for some reason, make it a little less rich?

thanks Sparkie, I think its a 1500 Mah glow stick normally take it off pretty quickly but will make sure I get it off quicker

Not a problem mate :-) Its just the wire gets too hot after a while and can snap off. Like a fuse in a socket :-)

If this doesn't work, then i'm lost :P

Happy rc'ing :-)

Firstly ritchen your mixture slightly, you may be runing a bit to lean...also use RB6 glow plugs

hi mate :thumbs_up:

hmm my 1st thought would be that you could be running abit too lean, but your engine should not be over heating with that temp. but it could be running a bit to hot for the plugs that you are using..

Yeh i 2nd what ian says, ritchen your mixture slightly, and get some RB6 plugs, modelsport or ebay will have them mate, leave the lsn for now and just try adjusting the hsn.

Heres another thought, when your model is running, is a lot or quite a bit of un-burnt fuel coming out of your exhaust? if so you could even be running too rich and it could be flooding your plugs, this also kills them, or atleast stops them from working properly..

Hope you sort it mate let us know how you get on. :thumbs_up:

Hi Ian / Mark yeah it's spitting a bit of fuel but not excessive. Who makes the RB6 plugs? I will go back to factory settings and start again and see how I get on is the RB6 a cold plug?

Many thanks


David

Hi, RB is the make of the glow plug and 6 represents cold, correct me if i'm wrong someone please.

I'm pretty sure i've said this somewhere else on this site. I used to use RB6 until i was told Novarossi C6 were exactly the same as the RB6. Now if you give Bolton models a call they will sell you multi-buy 3 C6's for £15 and that includes postage . Thats at least 3 squid cheaper than anywhere else and lets be honest if you destroy 2 plugs it starts getting expensive.

Yeh mate you told me that :)
But do you have the link where we can get 3 of them for £15?

David, yes mate i think the RB6 plugs are cold/medium plugs.

Heres a link.

http://cgi.ebay.co.uk/RB-Glowplug-Normal-G...=item3a5d9a06e6

And heres a link to the Novarossi C6 plug, just over £1 cheaper, but every little helps. :)

http://cgi.ebay.co.uk/NEW-Novarossi-C6-Sta...=item335f87aa4d

Hi marc, can't give any links to bolton models as there website is having an overhaul.

Great thank you!!

Ok,

Whilst running the model a couple of days ago the engine seized. I could not understand how an engine could seize from running this rich, anyway when I got home I removed the engine and dismantled it only to my horror to find three small pieces of metal jamming the conrod, now where the bloody hell did these bit of metal come from?? they are clearly not from the glow plug and I closely examined every other part inside the engine but could not locate where they may have come from, the only thing I can think that is that it could be swarf from the new engine.

I then rebuilt the engine richened up the mixture even more and fitted my new RB6 glow plug as recommended well half way through my first tank I stalled it, wouldn't start again - glow plug blown already!

Any other suggestions on why this model is eating so many glow plugs, when I found the bits of metal in the engine i thought they may of been causing the problem, should i take the model back to the store replace the engine??

Any advice is always welcome

many thanks

david

Unlucky mate, this seems like a continuous problem, must be driving you mad.

Erm, this is not easy, you have a good model, good plugs and good fuel, so i think this really leaves it down to 2 things, tuning issue or damaged engine.

When you put your engine back together and put the RB6 plug in, did you re-set the engine back to factory settings as well?

All i can think of mate, as your engine temp is not too hot and your not over heating, maybe your running the fuel mixture way too rich, which is flooding your glow plugs and stopping then from working, also locking the flywheel, Im hoping this could be the case. Its really hard to tell though without being there and seeing the model.
Or the engine could be damaged which is causing these problems, but im not an expert on the ins and outs.
This might help mate, could you get a video up of it running or trying to start.

If no joy, i think the best bet is to try taking it back to the model shop, and tell them the problems your having and been having from the start, they might be very helpfull and say they will give it ago, but if they dont, ask them to, if they dont have no joy, defo ask them to replace the engine.

Hopefully someone might be able to help more then i can. :thumbs_up:

Sorry, i've edited your post as to be totally honest, it was way off the mark.

Russ.



Basically, i would take it back to the model shop, tell them you have been having problems and they should hopefully be willing to help you, depending on how nice they are, what shop you use, and how long you have owned the car :-)

Hi,

Right found the problem, a knackered engine.

I took the engine apart again and really examined it well this time and noticed on the inside of the piston where the conrod connects the metal has broken off that in turn then got inside the piston which smashed up the bits of metal which got fired into the glowplug hence glow plugs keep failing.

I took the engine back to my model shop today who are going to send it off to SMD the distributor for Hong Nor and either replace the damaged parts or even better maybe a new engine under warranty.

Fair enough mate, no worries :-P

Well done on finding the problem mate. :thumbs_up:

Fingers crossed they give you a nice new engine mate, i think they should :)

Let us know what they do. :thumbs_up: