"Folks have been telling me for years that it won,t work because of heat and vibration, well I proved them wrong. I beleve depending on how you build the box that there is no additional vibration and that the batterys run cooler than in more common heavily insulated locations." John,

I believe your method of mounting the battery without consideration to vibration (and probably to a lesser extent, cooling issues primarily with heat soak after running the engine) is a bit of a Russian roulette affair. You have not proven doubters wrong - you simply have been getting away with it up to this point. You may run out of luck on your next flight.

Our batteries, regardless of type, are not immune to vibration and can suffer shortened lives or (worse) sudden and catastrophic failure. Internal shorts across insulators can happen, solder joints can fail, and interconnection spot welds can break. If you lose your flight battery suddenly and completely, you have no chance of fail safe and will of course be completely out of control. This will obviously likely lead to complete destruction of the model under the most fortunate circumstance, and worse could lead to injury or worse to someone nearby. It is just not prudent and safe operation.

Any radio system instructions I have ever read have been careful about advising isolation of the battery and receiver from vibration. It is one of the first things newbies learn.

I found a good write-up from a battery seller sent as advice to a modeler who was doing the same thing as you have been doing. I refer you to the following link:
http://www.rcuniverse.com/forum/m_38...tm.htm#9173261 See posts 1289 and 1292.

I by no means intend to criticize or flame anyone, and appreciate the efficiency of keeping the model as light as possible, but I feel strongly about this being a safety issue and discourage anyone from mounting a battery in this manner.

littlera