Graham W

Hi all, I've been recieving my monthly issues of the magazine ok but not the Autumn Special, is there some reason for it not being included in the subscription package?

Thanks Guys, can't find anything on Parc-amber online tho, no photos, nowt. Is it worth anything? the rubbers seem ok. I won't use it, it's too heavy.

As above Bob, they are rubber.

Simon, the bushes are rubber, making it a vibration free mount.

This adjustable engine mount was fitted to a model I recently obtained and I tried to find out what it is by doing a search of the internet to no avail. Does anybody recognise it? I would love to know who made it etc...... Edited By Graham W on 11/02/2015 13:56:06

Got it sorted, it is the correct plug cap, it's just bl**dy tight on the Champion plug.

I have just bought a brand new Zenoah ZP engine a 26 with electronic ignition, this is the first Zenoah I've had and seem to be a bit stumped. i thought I would assemble it to see how much space it would take in the cowl of my model, I fitted the exhaust and plug and tried to fit the plug cap...... well it seems no matter how I try it won't go on. The plug is supplied with the engine and is a Champion Y82, looking at the cap on the electronic ignition i doesn't even look like it would fit. Has anybody had any dealings with these engines and the plug/cap mismatch? or am I a complete numpty?.......... Edited By Graham W on 07/07/2013 17:06:39

It's beginning to look like the carb may be the culprit, as the engine also behaved badly on the test bench too, so that eliminates the model plumbing. I shall strip the carb down and give it a thorough clean and blow out using an airline and compressor, I can't blow that hard..... I still have the head gasket ploy to fall back on.

Thanks for the input guys, the crankcase breather was free flowing into air and I modded the inlet manifold to plumb it through the engine, but to answer your next question it did the same with the breather connected to the inlet and off the inlet. I have just purchased a pair of head gaskets for it, and another set of nuts, which I will try one gasket at a time to see if lowering the compression will do any good. As regards the plug, it seems odd that a new plug straight out of the packet will change it and then after it has run a while it does it again, and in the air, the prop has unloaded and there is sufficient airflow to the engine, it's fitted in a Hanger 9 Thunderbolt so there isn't an enclosed cowl issue. The only part that hasn't been stripped down and inspected is the carb, maybe I should do that next.

Fuel is 10% nitro 15% synthetic + 2% castor oil, plug is an OS F and the prop is a 15X6 K series Master Airscrew. The prop nuts were done up really tight. What I can't understand is the richer you made the mixture the worse it got, it never actually ran rich, it would spit off the prop first.

Hi all, I have an irritating problem with my TT .91FS, the engine was fine when last used about 4 years ago before standing it up and storing it in it's box, it was treated to a bathing in after run beforehand. The engine was fitted to a new model and taken to the flying field, on run up I could not set the mixture as it was way too lean, so I richened the mixture by about two turns, on opening the throttle it revved up and spat off the prop nuts washer and prop. So the bits were collected and put back on and I tried again. I richened the mixture once more as a lean mixture will cause the issue, but instead of curing it it made it worse, this time losing the locking nut and washer, the needle is now 3-4 turns open. The engine idles lovely. On getting home an engine guru in the club stripped it down and checked everthing out and re-assembled it making sure the timing was correct. He ran the engine up and guess what?... it did the same thing, he tried various mixture settings al to no avail, finally a new plug seemed to cure it so it was returned to me, whereupon it was duly fitted back in the model and taken to the flying field. Sure enough i ran fine, setting the mixture rich I flew the model, however, part way through the flight it became lean and started to "pink" so I landed and richened the mixture one complete turn and took off again. After two circuits the engine made a horrible noise and threw off the prop, I managed to get it down without incident and saw that both the nuts had gone, the prop finally coming off when the model was stationary. I am at my wits end, what on earth could be causing this problem? The engine did seem to be very hot, so pre-ignition of the fuel seems to be the most likely cause, but why? Edited By Graham W on 28/05/2012 12:01:04

I just downloaded the prop chart from the site and took a step back time...... Surely this chart is due for an update, where is the listing for the two most popular four stroke engines on the market today, ie. the .52 and the .70, come on guys, this chart is to take out the guesswork of choosing a propeller for your engine and what do we have to do for the .52 and .70?..... guess between the .45-.48 size and the .80 size props.Edited By Graham Wilkes on 19/02/2010 11:30:12