Without another thought, he pushed himself hard and deep into the girl. Hailey squealed in pleasure and pain as Robert slammed his cock deep into her. She had had sex with a few different guys from school, but this was already much more amazing and intense. She was moaning very loudly as Robert moved hard in and out of her. She knew she should try to be quiet, so she didnt wake Heidis baby, but she just couldnt help it. This cock ramming in and out of her felt so very good. Robert pulled himself into her hard, over and over again, holding her hips as he did so. After a bit, her reached up and grabbed a handful of the girls hair, pulling her back hard onto his cock. This seemed to be too much for her as she started to cum for the second time. He could feel her pussy spasming around his cock, and he wasnt sure how much longer he could hold on. As she hit the peak of her orgasm Robert slammed into her as hard as he could, pumping his cum deep into her tight little pussy. As Robert. " I agree with that, but we have enough trouble with machining the parts for a Sterling Cycle engine. Just think of how much more difficulty we would have with a jet engine." Not necessarily. I was digging through the DVDs on jet engines and came across a very simple design: the pulse jet. It has almost no moving parts and does not need fine machining. In fact, it would be much easier to make than one of our Sterling engines." If the pulse jet is so good, why was it never used commercially back on Old Earth?" That's just it, the pulse jet is easy to build, but does not have the efficiency of the more complex engines. As far as I have been able to find out, it was never used in large numbers for anything but the German Buzz Bomb of World War 2. There, they were after the simplicity and low cost of the pulse jet, and the other concerns were not that important." OK, so we go with the pulse jet. Who would make one, and what fuel would it use?" That's easy to answer. If you ask Aerial to.
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