Reverse rotation pumps?

[calereeves]

Are there reverse rotation pumps available?  Looking for something that could be run as a matched pair of counter rotating pumps...  Just a curiosity thing for now.

 

[ChryslerJet]

Not really a need in Jet Pumps the only reason Props need them is they actually produce a rotational flow where as the jet pumps provide straight flow of water once its pushed out the nozzle. 

 

[duanehydro]

http://www.youtube.com/watch?v=KUX347RsFGg

closeest I could come to answering your question.

 

[Drumzilla]

CJ ...have you been drinking ....  crazy.gif

 

[Drumzilla]

http://www.youtube.com/watch?v=KUX347RsFGg

closeest I could come to answering your question.

That's a bad ass boat. I heard it was sold and tore apart. then I heard it was still around...hum... sure would like to see it up close and see it run....

 

[Knotty Girl]

That thing was squirting some serious water. 

 

[calereeves]

Thank, CJ...hadn't ever really stopped to think about the mechanics of the pump!

 

[ChryslerJet]

CJ ...have you been drinking ....  crazy.gif

I don't drink the koolaid or the river water

 

[Crusader]

There's still rotational flow coming out of a pump. Unless there's vanes in the nozzle that stops the flow, the water will still be rotating....just like with a prop. The only difference in a jet is that you don't have the rotational forces fighting each other because of the nozzle, like you would do with the non directed flow of two rotating props

 

[Devilman]

Seen a few write-ups on different dual pump boats.. Can't say if any of them had counter-rotating pumps or not though. Would there really be a need for it? Interesting topic.

 

[jetboatperformance]

With some searching you'll find a yellow Glass Jet boat Vid out there with what I recall was a Lycoming gas Turbine and if memory serves It seems that it had a "reverse" rotation Impeller (and Bowl special)  built for the application I'll dig for the article  Tom

PS Kenny all the dual jets produced by Aggressor have been Standard rotation , actually sent parts out for one yesterday

 

[Devilman]

I gotcha..  Are there a lot of them running around, dual pump boats? Not the workhorses & such, but boats like ours. Like that Taylor SS, there was an orange/white Liberator or Daytona (don't recall which), that first Trident was a dual jet...

 

[Becket]

There's still rotational flow coming out of a pump. Unless there's vanes in the nozzle that stops the flow, the water will still be rotating....just like with a prop. The only difference in a jet is that you don't have the rotational forces fighting each other because of the nozzle, like you would do with the non directed flow of two rotating props

Correct, the Water rotating out of the Nozzle has no effect on the Boat as there is no Counter Rotation effect that is caused by the Props rotation in the Water.

 

[SimplyOrange]

not worth the time and money, buy two matching used pumps and bolt them to angled intakes and call it done.

at one point I was thinking of putting twin 5.3ls1 or twin skyline inline 6 engines in a hull I have.

http://www.berkeleyjet.com/c-665-intake-assembly.aspx

 

[jetboatperformance]

Were currently building four matched Aggressor Jets for a customer to be rigged into a 25' riverboat with Two 540 cu motors ...  think.gif

 

[calereeves]

at one point I was thinking of putting twin 5.3ls1 or twin skyline inline 6 engines in a hull I have.

http://www.berkeleyjet.com/c-665-intake-assembly.aspx

Twin aluminum 5.3s is what I was envisioning when I started wondering about the reversed pumps.

 

[SimplyOrange]

at one point I was thinking of putting twin 5.3ls1 or twin skyline inline 6 engines in a hull I have.

http://www.berkeleyjet.com/c-665-intake-assembly.aspx

Twin aluminum 5.3s is what I was envisioning when I started wondering about the reversed pumps.

exactly what i had in mind.

 

[ChryslerJet]

at one point I was thinking of putting twin 5.3ls1 or twin skyline inline 6 engines in a hull I have.

http://www.berkeleyjet.com/c-665-intake-assembly.aspx

Twin aluminum 5.3s is what I was envisioning when I started wondering about the reversed pumps.

But then you would have to have one of the 5.3's run in reverse rotation for that to work.  Much less expensive to just use two standard rotation motors and pumps.

 

[EOSpeed]

1  JET DRIVE AND 2 ENGINES END TO END. EASY.
                                                                                clap.gif

 

[blazeracer]

at one point I was thinking of putting twin 5.3ls1 or twin skyline inline 6 engines in a hull I have.

http://www.berkeleyjet.com/c-665-intake-assembly.aspx

Twin aluminum 5.3s is what I was envisioning when I started wondering about the reversed pumps.

These are just intakes with the grate part canted to the left or to the right. They are still get regular ole pumps bolted to them. They just go on the angled sides of the hull and not the keel in the middle. 2 drives, 2 motors. There was a dude at Tawak that had a Skater with two 5.3's in it. Sweet boat.