Flattie DRAG BOAT Top Speeds...

[Sanger_Spectra]

My neighbor has an eliminator jet, jet pump is polished and he has headers, the thing is loud, he can break 110 and still have throttle left, may be we should get some jet guys to really talk about speed Sorry just my attemp to add a little humor. The pilots of these things going that fast are just flat crazy. WOW!!

[WESTERNAERO]

My neighbor has an eliminator jet, jet pump is polished and he has headers, the thing is loud, he can break 110 and still have throttle left, may be we should get some jet guys to really talk about speed Sorry just my attemp to add a little humor. The pilots of these things going that fast are just flat crazy. WOW!!

Damn, that's was rough! Lmao!

[2manymustangs]

Bruce, first off a "flattie" hull can mean many different things considering how many varieties there are. The fastest flatties are runnerbottoms and have pushed up on 180 mph, but many have crashed much slower. The non runnerbottom circle hulls have been proven at just a tick over 150 and according to some team claims (which aren't verified) upper 150's. Again many have crashed much slower. So, with all conditions and factors perfect one can figure the best runnerbottom right around 180 and the best circle flat low 150's until these marks are raised.

Yep, I do understand that there are variations/variables on the runners/steps/strakes/etc, that is why I lumped them all into one bucket (not knowing what the drag guys favor).

Can a legal drag/circle flat have ANY keel OR gull at all? IS a TRUE flat just what the name implies? What are the rules for CIRCLE and for DRAG ?

When you look at KILO records for this hull type and top speeds from back in the day with FUEL boats it leads me to believe that there is a limit but that is just my simple and UNexperienced view.

Are there more variations/changes that can be made to make them safe at 180 and up like additional bottom refinement/wind tunnel testing/wings/capsule shape/weight/balance?

At this point, 40-50 years later, have all of the LEGAL ENHANCEMENTS to the bottom been tried at this point?

Are there chine differences that are legal/not legal helpful somehow in high speed stability?

[Sharp shooter]

Can a legal drag/circle flat have ANY keel OR gull at all?

Yes

IS a TRUE flat just what the name implies?

Sometimes. Some true flats have a tiny amount of V and some don't and some true flats have dropped chines.

What are the rules for CIRCLE and for DRAG ?

You're crazy if you think I'm gonna list all the rules.YOU can look that up. Circle bottom rules are on line. Drag boat rules might be too, but I don't really know.

When you look at KILO records for this hull type and top speeds from back in the day with FUEL boats it leads me to believe that there is a limit but that is just my simple and UNexperienced view.

Are there more variations/changes that can be made to make them safe at 180 and up like additional bottom refinement/wind tunnel testing/wings/capsule shape/weight/balance?

Your guess is as good as mine.

At this point, 40-50 years later, have all of the LEGAL ENHANCEMENTS to the bottom been tried at this point?

I couldn't say...

Are there chine differences that are legal/not legal helpful somehow in high speed stability?

I have no idea...

Hope this helps.