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BMFA club affiliation No 0340
July 08
FLY SAFE - Fly Again
Next gathering at St Andrews Rugby Club, July 7th 2008 then September 1st
August is your holiday month
Mike should now have £30 off members to take you to the end of the year. I know what you lot are like - you will forget, do it NOW, thanks, it is overdue.
Our Webmaster is always on the lookout for pictures and useful info to make the site appealing and worth browsers visiting. It is one of the clubs recruiting grounds and our face to the world.
Another web site that needs support to make it a useful recourse is http://www.bmfamid.co.uk All with e-mail should have received this link from Mike recently. I have had a look and with support from BMFA members in the region it should prove to be a good discussion and information point.
A warm welcome to another new member. John Philips who is also a member of Nene Valley Aeromodelers.
I did say I was going to continue with last times guide on how to use LiPo batteries for your Rx and Tx. All I am going to say, I'll explain why in a moment, is that there are available LiPo battery packs that will fit in most Tx s. If you want chapter and verse on this mail me and I will send it. My reticence in putting it in full here is that I do have a concern. It is all to do with cold. I have to do some more delving, but as I understand it at present, during cold weather the performance of the LiPo packs reduces drastically. So all you who fly LiPo during winter lets have your thoughts.
What I do have for you is a piece I have dredged up about fuel. A bit like batteries realy; how many bottles of different fuel do you need. This bit says only one, as long as you follow a few basic rules. Many of us take fuel for granted, and use the one we have always used, because of the pretty colour. So to help you choose just one bottle to take with you read on.
1. Don't listen to the club expert / soothsayer's opinions.
2. Never leave your fuel bottle open. Methanol is hygroscopic, i.e. it absorbs water.
3. Always filter your fuel at least once before it gets to the tank
4. Running 10% nitro methane will prove fine in almost any engine, as it's a good, average mix.
5. Don't run castor oil in a four-stroke.
6. Don't believe all the hype you read.
7. Don't be fooled by the colour of the fuel, it's just a dye
8. Don't leave raw fuel in your engine, as this causes severe corrosion.
9. Check that the nitro methane content is quoted by volume (if by weight then reduce mentally by about 1/3 when spending your hard earned).
10. Be aware that not all synthetics are the same.
11. Don't store fuel in bright sunlight or in hot environments.
12. Never run your needle settings leaner than one or two clicks richer than peak rpm. Set your engine on a half-filled tank with the nose held up.
13. Using nitro methane in small percentages (i.e. 5 - 10%) will prove beneficial on any engine - even those happy on 'straight' fuel.
14. Nitro methane will shorten your flying time. The needle will need richening for any increase in nitro content, and the engine will run hotter - not cooler.
What is the 'wonder brew' then? Well, without naming names, it's a fully synthetic methanol and nitro methane mix with a sufficient quantity of clean running, highly effective synthetic lubricant that seems well up to the job.
The bottom line on fuel is that no matter what the make or name on the can, no matter what the mix or type of fuel, if it's got methanol and oil then your engine will run on it. Furthermore, provided you don't run the engine impossibly lean then you're pretty unlikely to damage anything.
It's not the fuel that damages engines, it's the operator.
Castor has all sorts of properties, some more laudable than others, and it does make a very good lubricant for model engines. However, in the end it kills with kindness. The early aero engines had to be regularly dismantled and cleaned of castor residue, as do our own, because that horrid castor gum will shellac and clog model engines something rotten. Yes it's cheap, it works, and you'll be unlucky if you seize an engine using it, but it will completely destroy your four-stroke over time as it clogs up all the little valves and oil galleries, whereupon the valves will stick open and the bearings will skip and scuff. Castor harps back to the era where automobile engines were stripped and decarbonised every ten thousand miles or so, and any engine run on the stuff soon turns brown with that 'dipped in toffee' appearance!
Running nitro in appreciable quantities will release a commensurate percentage of power. For example, running 30% nitro in your brew will give an approximate power hike of 30%, and that's not to be sniffed at. Don't unduly worry about the corrosive bi-products that nitro burners are supposedly afflicted with, given that you have to run methanol anyway, which is far worse in that respect. It's expensive and heavy, and as it burns quickly you have to carry more of it, which of course means that the more you include in the mix, the shorter your engine run time will be. On the plus side you get more power and a far less fussy engine that throttles better and runs faster. What's more, the idle performance will benefit greatly.
Hope this gives you something to think about!
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A brawl over a model airplane landed one man in the hospital and could send another to prison for more than five years. At about 8 p.m. Gregory Dean Hunt, 48, of Medford, was flying his radio-controlled model plane in a field north of McAndrews Street when a homeless man on a bicycle approached him to argue about the little plane, Medford said. "These two did not know each other," "We are not sure what Mr. Hobson's problem with the plane was. He was flying it in a safe area and was not disturbing anyone." Hobson punched Hunt in the face and kicked him, knocking out six of his teeth. Meanwhile, the model plane buzzing overhead spiralled out of control and made a crash landing. The white, turquoise and purple "Hangar 9" plane, valued at $800, hasn't been found. After beating down Hunt, Hobson pedalled away on his bike, heading south along Central Avenue. Witnesses told police Hunt then pursued him in his 1996 Chevrolet Tahoe, Budreau said."Mr. Hunt then swerved across the road to crash into the side of Hobson's bicycle and pinned his legs against a chain-link fence," Budreau said.Passers-by called 9-1-1 to report the crash, and police, firefighters and emergency medical professionals responded. Hobson's leg was broken just above his ankle. He had surgery Thursday at Rogue Valley Medical Center. He was cited and released on charges of fourth-degree assault and first-degree criminal mischief.Hunt returned to the scene shortly after police arrived and was arrested after a visit to the hospital to treat his facial injuries. He was charged with second-degree assault and first-degree criminal mischief. Second-degree assault is a Measure 11 crime that carries a mandatory five-year, 10-month prison sentence upon conviction. Hunt remained lodged in the Jackson County Jail late Wednesday on more than $1 million bail. "It's safe to say there were some poor choices made by both parties," Budreau said.
As always FLY SAFE. Stu'
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