jetdrive Q & A

[hilyfe]

Hi guys
Im thinking of getting a new boat
And use a jetdrive
I have a couple questions about it
Hopefully you guys have an answer for me

1-where or what brand is best to buy?

2-would it be possible to use brushed motor on a jetdrive?

3-bigger jetdrive does it mean you have more speed?

Thanx thats all for now

[Doby]

1) http://www.kehrer-modellbau.de/en/

2) Yes

3) Maybe...depends on motor size, jet drive size, voltage, boat size etc....

[hilyfe]

Hi doby




Heres the boat im trying to get next
46 inchess length
Aluminum hull
Perfect for a jetdrive
Able to carry 6vv 12ah sla battery

[Mike Caruso]

I have been working on finishing my Jet boat using a Mickie Beez Pump sold here on OSE just go shopping very very nicely made. His says about 26,000 rpm max should have an answer this weekend. I have no idea what motor you can use?

[DSC1]

Hey I looked at that hull the Mozziecraft Ricochet. I asked them if they had any drives they recommended and they didn't. I'm waiting on my boat to be delivered. I went with a Banjee jet boat.

Vanderbijlpark-20140906-00153.jpg

Sorry to hijack your thread, but I'm also looking for motor suggestions.

[hilyfe]

Its all good
sharing information is always good

I also asked them if they can reccomend a good jetdrive for the 46 ricochet
And heres what they suggested

http://www.rcnz.com/Shop/Service/Detail/Product/6905

[Peter A]

Something to consider is that jet units take a lot of power. My own experience a few years back with making small units and brushed motors with nicads was less than impressive. The jet unit at rcnz is designed for gas power and will take a big brushless setup to make it move. Sla batts just will not deliver. Don't be discouraged but expect to need a fair wack of power to perform.

[hilyfe]

Hi peter

Are you saying jetdrive use more energy than a regular props set up?
Just to be clear since I want to have at least 2 hours of run time

[Peter A]

Yes jet drives use a lot of power. If you are using 12 Ah batts and want 2hrs runtime then you need to draw less than 6 amps. That may work in a scale displacement hull but really isn't realistic for what you are wanting to do. If you are after long run times you may need to consider a petrol motor so you will have the power and speed required. A large brushless setup will work but you will not have more than a few minutes running on a charge.

[hilyfe]

Uh huh
Thanx for cleaning that up for me
I really appreciate it

Maybe you can tell me what type of boat electronics to have a 2 hours of run time
With a brushed motor

[TheShaughnessy]

What is speed goal. 2hrs is a lofty goal for a boat

[hilyfe]

Scale tugboat speed is good enough
Doesn't need to be fast

[TheShaughnessy]

Just be prepared to have a boat full of batteries.

[RunningBeer]

Hi, I've had a bit of experience building jet boats, there are a few photos of my 10s electric on my page. It has a neu22153y motor 480Kv. It accelerates extremely fast but like most jet boats sucks harder on the water with the more power applied so the top speed is only about 65Km. I only get about 5 minutes of fun out of my power combination so I guess that's not much good for you! My jet unit is a Swashdrive (56mm 3blade impellor mixed flow pump). I believe that pump is now a 'Jettec' manufactured in N.Z. Sounds like you might be planning a bit of fishing on your boat?

[hilyfe]

Thats my plan fishing and having fun at the same time
I like those aluminum boats
Im pretty sure those things are sturdy
How about using an outboard
Whats the ups and downs on those outboard motors?