So, I am planning a camping trip with my girlfriend at the beginning of December. I imagine she will freeze in the 20 degree temps. I was looking online and have researched some Sterling engines. They are intended to be used as stove fans, but I had a bright idea. Hopefully you all will tell me just how bright it is <img src="/forums/images/graemlins/smile.gif" alt="" />

How effective do you think it would be to take some rocks and leave them in your campfire for period of time, then close to bedtime, wrap them in foil, and set the Sterling engine on top inside your tent? We've used hot rocks to heat the tent this fall, but I was wondering if it might be more effective with the Sterling engine. I look forward to your speculations! <img src="/forums/images/graemlins/smile.gif" alt="" />