Air powered bicycle. by saul

空气动力自行车

原文链接：http://www.instructables.com/id/Air-powered-bicycle./
原作：Saul

译者：Kalimov

译者按：排气量2000cc，时速6千米，二氧化碳及PM2.5排量零，拉风程度近乎爆表，让人毁二又四分之三观的作品……

A hybrid pushbike / compressed air powered bike.
此乃混合动力自行车/压缩空气动力自行车。

Step 1: Find and modify an air tank.

一、入手改装气缸

this is an old propane tank. this turns out to be a very bad idea. although the propane was emptied out, the really heavy mercapton (stinnky sulfur based molecules) were left in the bottom of the tank. even after 20 odd air refills, it still smells awful to run air from this tank. hence the nickname - "stinkbike"
这里用了个旧石油气瓶，主意着实糟糕透顶。尽管里面的丙烷已经空了，但真正比重大的巯基成分（就是恶臭的含硫的分子）仍残留在气缸的底部。就算再经过20倍以上空气稀释，用这个罐子进行喷气还是中人欲呕，于是此作由此得名——“自行臭车”。

Step 2: First crazy tandem test

二、首次疯狂双人测试

for want of a better idea, Eric is going to sit on the pannier cage and rub the chuck of the air drill (friction drive) on the wheel, that way i (saul) can pedal and steer without thinking about other thingy..
为了得到更好的方案，Eric就坐在后座，扭动气钻对轮子进行摩擦传动。这样我，Saul就能心无旁骛地踏车驾驶了。

Step 3: One person operation.

三、单人操作

so it actually worked and moved eric and I along at about 4 miles perhour for about 1 minute. that's all we expected from a 100psi tank. what we really need is a 4500 psi carbon fiber scuba tank. in theory that should give 250 watts worth of power for about an hour. that would be way cool. also need more efficient motor directly in drive train to really accomplish this.
它的实际功效是将我和Eric以时速约4英里（约6.4公里）骑行约1分钟，和我们预想的压强100psi（约6.8个大气压）气缸结果一样。现在我们需要一个4500psi（约300个大气压）的碳纤维水肺，理论上它能以250瓦功率输出一小时，就变得很不错了。同样在传动装置上也需要更有效率的马达来完成这个作品。

Step 4: Test it.

四、测试

the one hand operation is difficult.
单手操作很困难。
particularly when the brake handle is on the same side as the hand required for the throttle operation...
特别是当刹车闸和节流阀是在同一只手操作的时候……

（译者注：如原作所说，使用旧煤气罐是个节能不减排的糟糕方案。不过真要用了潜水耐压气瓶，可以想象到大马路上咻咻的自行车“放屁”声……）