History Question????

[Advance_United]

1) What were the engine classes in Tether Boats?

2) Has IMPBA Class E always been set at .67 cu. in. ? If not when and why was a change made?

Thanks.

 

[Ron Olson]

Tether boats have been around a lot longer than the IMPBA. The IMPBA has only been around about 52 years and tether boats have been around since the '30's at least. What I have read is that they did have classes up to 30 cc at that time but how they set up their classes, I have no idea, I'm not that old! How about it J.D.?

 

[Russell Bear]

Contact Roger Newton. He used to run them in the 70's.

 

[Mike Hughes]

I clip this from this site. http://search.netscape.com/ns/boomframe.js...utspeedcars.htm

Mike

The classes are 1 - 1.5cc (.09 cu in), 2 - 2.5cc (.15 cu in), 3 - 3.5cc (.21 cu in), 4 - 5cc (.29 cu in) and 5 - 10cc (.61 cu in). Running on an methanol - castor oil (80:20) fuel and using tuned exhaust pipes the engines peak out at over 44,000 rpm in the smallest class.

 

[Advance_United]

Thanks for the responses. I'll contact Roger.

Tether cars are an arcane black art. I ran a 10cc for a few years. I've seen the O'Donnels run 204+. Not too shabby for alcohol. The sound drills right through you.