Paul De Tourtoulon Posted November 28 Share Posted November 28 9 minutes ago, Konrad said: 78 methanol 20 caster oil and 2% 3% A man after my own heart, we did put 1/2% petrol in the fuel in winter, but never noticed any change, what did the Acetone do to it ? Wankel, I have always fancied one, silly prices today. Quote Link to comment Share on other sites More sharing options...
Konrad Posted November 28 Share Posted November 28 Acetone adds some volatility to the fuel. It aids the low speed idle and start with little or no effect on the high power part of the engine's response. It is what folks often are really trying to do with higher nitro fuel in sport engines. Nitro actually is detrimental to ignition as it displaces the methanol in the mix. Remember that the glow engine is possible because of the catalytic reaction between the methanol and the platinum. 2 Quote Link to comment Share on other sites More sharing options...
Konrad Posted November 28 Share Posted November 28 1 hour ago, Paul De Tourtoulon said: A man after my own heart, we did put 1/2% petrol in the fuel in winter, but never noticed any change, what did the Acetone do to it ? Wankel, I have always fancied one, silly prices today. In the cold winter months when we ran races with club supplied fuel, we would all have a little bulb of Coleman fuel that we would prime the engines with. That would start the fire in any cold blooded engine! Quote Link to comment Share on other sites More sharing options...
Peter Jenkins Posted November 29 Share Posted November 29 The worst engine I ever bought was my first one, a Mills 75 back in 1963 when I was 13 and had no one to turn to for help. I had it in a Veron Provost C/L trainer and running "flat out" it wouldn't drag the aircraft along the grass! I eventually bought a RTF KK badged plastic control line with a WenMac Hotshot! Wow, what a difference! I wasn't until I bought a PAW 249 that I realised the Mills was severely under compressed. The reason it was? Some one had put the compression stop in after backing off the comp lever by one full turn. The comp stop prevented you from over compressing the engine but only if it was installed correctly! Must have been a Friday afternoon assembly. Anyway, having cut the stop off with a hacksaw (I know young and foolish at the time!), and cranked up the compression the engine was transformed! I put it into a .8 cc stunter that came as a free plan in Model Aircraft of blessed memory. I still have it but haven't tried running it and it must be 60 years since it last ran! So, a transition from worst engine I ever had to one of the best! 4 Quote Link to comment Share on other sites More sharing options...
J D 8 - Moderator Posted November 29 Share Posted November 29 Similar to Peter above I had a Cox 15 medallion that just would not run. This was my second glow engine [had a Pee Wee lost in a fly away] and while it would fire it just would not run. I felt this engine was a bit tight but after many flicks over many days it felt little better. After some time put away the day came when it was "Right you are going to go today or it's bin time" Bolted it to a bench and connected it to an electric drill running high speed, no reverse on drill so going the wrong way the idea being to run it in not start. Gave it about ten minuets with a little squirt of oil now and then. Fuel and glow one flick and it screamed into life like only Cox can, I jumped back in fright! Quote Link to comment Share on other sites More sharing options...
Tim Day 2 Posted 17 hours ago Share Posted 17 hours ago Really interesting thread and the mention of MDS reminds me of when I worked in a model shop in the late 80’s/early 90s. We started selling MDS and our local club really didn’t like them and we did get more returns than any other brand; they were obviously cheaper than the equivalent OS 40 FP so were bought by price conscious beginners but we usually tried to steer beginners towards OS then Irvine/Enya. The BD Mascot with an OS 40FP and Futaba Challenger was always our recommendation for beginners. We sold Super Tiger but they were more niche (I liked them though….I remember the model shop owner said that Mick Wiltshire took a unique approach to customer support…. 2 Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted 14 hours ago Share Posted 14 hours ago That’s a good way to put it but to be fair, Mick was actually very helpful and informative unless you went against his guidelines - when you would experience the less than diplomatic expression of his opinions. I suspect that others in similar positions may have felt similar frustration. If you got talking to him he was a mine of information and a pleasant man to talk with. 2 Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted 2 hours ago Author Share Posted 2 hours ago 14 hours ago, Tim Day 2 said: We sold Super Tiger but they were more niche (I liked them though….I remember the model shop owner said that Mick Wiltshire took a unique approach to customer support…. ☺️👍 Quote Link to comment Share on other sites More sharing options...
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