Optifuel v model technics

[rachel]

what was 1963 like?
as i wouldn't know, i'm to young

Apparently 1963 was a bad year for space barons

Anyone want to add a post about why we should use Optifuel or Model Tecnics or just throw our engines away and go electric cos . Electric is the future !!!!!

Or shall I just go with the humor thing ????? I could be the next Danny ?
maybe not.

[callum]

.................................................. .....

[jwatts007]

£20 quid a imperial gallon (why do they still do frigging gallons) I get 20 ltrs of opti for £82.00 from the model shop..

[electricsceadu]

i guess i should add something to the op
i've not used optifuel but in the past i've used mt bekra 20 ad it was a good fuel although the engines ran a little warmer than coolpower and magnum 30


but now as i'm a club agent for brand x fuel i won't get into any arguments of which fuels the best
but any fuel bought from myself has to be the best fuel
if anyone would like to send me a free bottle of copter mix and optifuel i'll try them out for you

[Steve]

How much is this coptafix stuff to buy a gallon..

The factory is in your back yard in Southend my friend. You can get any MT fuel you like direct from them at much reduced rates than you would pay in the shops.

[moonmanflyer]

To be fair, i never had a problem using optifuel, had a bearing go early on, but then the engine had been running magnum before it, then ran opti for 12 months ish and then swapped to model technics 30% coptamix.
People say about the smell from MT but i like it, like someone said a sweet smell.
Personnally not seen a power diff between 30slv and copta30

[Dave Rand]

Tbh I didn't like the colour of copter mix

[SLIPPERY STEVENS]

Oh well dave, you havent got any nitros so your shit coment dont matter.

[jwatts007]

You want to see some of the brown horrible stuff some of them put in there tanks in our club, GO GLOW GO or somthing like that, think it should be banned makes the place look a mess...

[Dave Rand]

Oh well dave, you havent got any nitros so your shit coment dont matter.

The colour clashed with your tail fin lol

[mattie-lodge]

Quick input I want to make here.

I feel I'm quailfied to do so...One through experence and Two through not using either MT or Optifuel regularly.

Ok, lets address this 'rust' issue with the fuels we use. The term 'Hygroscopic' means the ability of a substance to attract and hold water molecules from the surrounding environment. Our fuels we use are this...hygroscopic!!!! Therefore depending upon where you store/operate your heli's and the percentage of humidity in that place determines how much moisture the un-burn't fuel in your engine holds when it is stored. This will when then be related to the amount of 'rust' you see when you open up your engine and take a look at your back bearing after a period of no use. So IMO you can't compare these types of fuel in this instance.

The second point I want to make is probably the most important one and in most cases is overlooked. If surface 'rust' on the bearing is seen when the backplate of your engine is removed, this doesn't necessary mean your bearing is toast. The part of the bearing that counts is the inner parts of the races where the balls travel around. You can only inspect this when the bearing is removed and disassembled.

I've now been running these engines now for over 5 years and that facts are these. Ive never disassembled a removed bearing and found 'Rust' on the inner races. What you do find is 'impact' pitting on these parts and more importantly only at certain places around the race you will find this pitting. This can only be caused by the force of the engine detonation cycle.....This is a Fact !!

So how can we stop this from happening and prolong the life of our bearings. Well it's a difficult task when we abuse these engine the way we do. We could spend hours working out compression ratios for the particular nitro content fuels, we could then meticulously tune the engine each time we fly depending on weather conditions, but in reality it would mean they would never get flown for fun and we would spend all our time messing about with them trying to get the perfect runner!! The solution is to learn how to detect when your engine is not happy by listening to it and try your best to correct it before terminal damage is caused...

I suppose the moral of my post is all this squabbling about whether or not one fuel rusts more than the next is rubbish. I spent most of last summer flying with a buddy of mine who flies Opti-fuel and I fly Rapicon. The performance and bearing last-ability was identical. Much the same as MT would be I guess.

You buy what you can get hold of, what you like the look of and what you like the price of Its that simple

[Tim Procter]

Well said Mattie.

[rachel]

Bbbbbbbbbbbbaaaaaaaaaaaaaaaaaaahhhhhhhhhh

[millerman]

Bbbbbbbbbbbbaaaaaaaaaaaaaaaaaaahhhhhhhhhh

rachel i think your keyboard is broken

[rachel]

It is tttttttttttttttttttttooooooooooooooooooooooooooooo oo

thanks I must get it fixed