I have to applaude anyone who tries new ideas whether they work good or not. No matter what the results are I couldn't see myself sawing twice the size hole I have now in the bottom of the boat for the new intake as well as the additional cost. Also common sense tells me that two pumps are not going to make twice the thrust. I would speculate that it would devide the motor HP between the two pumps[minus the losses of running the gears] and they both will need to run a lot smaller impeller. I hope the new unit works well for them and the results are tremendous.
Can I ask y'all a question?
I'm not a pump guy and most of you know that.. But it looks to me like there replacing one big pump with two medium pumps.. Basically in effect just adding some more thrust by having two pumps that produce more nozzle diameter then a single..
Why not just make one pump a little bigger?
RD
I for one, like less reciprocating/turning parts with less maintenance [don't care much for duoprops either],but there are people who would do anything just to gain 1 MPH http://free.***boat.net/ubb/wink.gif.I give them credit trying something different but would like to see any gains with same horsepower.
For gains with the same horsepower that Super jet dealio from Dana looked like a pretty good idea.. Ya know the thingy, up down right left, with the varying nozzle size etc.. didn't it have like an 8mph gain?
RD
CC and MK ----- You still haven't learned that no one wants to read the crap you guys are writing. Lets all try to get along. There are other ways to voice your opinion without getting everyone mad at you. Your ideas are just that-YOURS. Others have their own opinions about what works best on their boats. If everyone had the same opinion we would all be driving the same boats.
RD ,even though the Dana unit looked more complicated it was a genuine design. This twin thingy doesn't look attractive to me .Just MHO http://free.***boat.net/ubb/biggrin.gif
Originally posted by RiverDave2:
Why not just make one pump a little bigger?
RD
I was thinking the same thing RD. I also still think some sort of a transmission would work too.
Originally posted by RiverDave2:
Can I ask y'all a question?
Why not just make one pump a little bigger?
RD
Good question RD. All i can say is, I don't know. I'm definately not an engineer and couldn't even begin to think how it might be done. When I talked to Dave at Aggressor he said that although some changes are done totally by design priciples others happen by accident. It's my understanding it took hundreds of tries at the light bulb before one actually worked properly? Only time and testing will tell if this thing actually works in the end.
One other thing to consider, if it works, who will buy it if the results aren't a huge jump over a single jetdrive?
Brian
hey kids,well i was there with Harold Bruce and saw the testing of the boat.It is a new 24' spectra with twin aggreser pumps conected to a single intake.And yes the boat got out of the lagoon!!! it performed well for its maiden run.Harold ran a VERY mild motor and top speed was about45-50 mph.There are some changes that need to be done,the motor was placed in the middle of the boat for the idea of a mid engine ,but that caused some serious plowing and he had to keep the trim up to keep it level,and more hp would i think help!!
The spectra is a very heavy boat so i think with some changes to setup and hp this is a great alternative to an outdrive.After some changes he should get some better numbers on the next outing!!!! http://free.***boat.net/ubb/biggrin.gif http://free.***boat.net/ubb/biggrin.gif Cole
Someone I know had a ca1980 24 Charger [similar to the 24 spectra in size @ hull bottom]with a single 454 LS-6 and Berk Jet doing the same speed posted above! He converted it to SD to achieve more speed.Was a Smart decision http://free.***boat.net/ubb/wink.gifBTW Cole, what do you mean by NEW spectra http://free.***boat.net/ubb/confused.gif ?
[This message has been edited by spectras only (edited February 10, 2002).]
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