I thought I'd post you Lads Videos of some of my engines running.
1st up an Elbow Engine
http://www.youtube.com/watch?v=zVjsiqzU6Cs
2 nd up a Three cylinder Radial
http://www.youtube.com/watch?v=lNPtbzcx89w
3 rd up a Finger Engine
http://www.youtube.com/watch?v=M4UzHkv5kic
Last my Loco Running
http://www.youtube.com/watch?v=oqDAAMWftJg
I hope you find them of interest
Stew