RE: The Unofficial all things Jet drive thread  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       



All Forums >> RC Boats >> Speed - Electric >> RE: The Unofficial all things Jet drive thread Page: <<   < prev  56 57 [58] 59 60 61 62 63 64 65   next >   >>  

Login
Message << Older Topic   Newer Topic >>
RE: The Unofficial all things Jet drive thread - 7/20/2008 8:43:20 AM   
fvega


 

Posts: 14
Joined: 7/20/2008
From: Snohomish, WA, USA
Status: offline 		Thank you for the information posted. As my next project will like to try a jet power boat. I am looking at the Dumas SK boats (either 27" or 36" with a flat bottom but only 3-4" on transom. Can I adapt a jet unit to such a boat? which unit would you recomend Graupner, KMB? what size unit? Help appreciated it. thanks

(in reply to Quicksilver1)
       Post #: 1426

RE: The Unofficial all things Jet drive thread - 7/20/2008 4:25:49 PM   
DRAGONFIRE81M


 

Posts: 1154
Joined: 1/9/2007
From: PORTLAND, TN, USA
Status: offline 		welcome to the thread . i tock a look at those hulls im not sure how they well go with a jet drive but it looks like you have just enof room for the 29mm drive from grumpner . i would go with the 27" hull this drive will have plenty of power for it . im not sure if it would push the 36" to well but it does do a go job with a 31" i personly like the vee bottom sk hull its 19" if my nitro jet vee works out . i mite be building it with a .18 and the mini jet drive . here is some pic for every on the first is the 36" and the sec is the 19" that i like

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize

(in reply to fvega)
       Post #: 1427

RE: The Unofficial all things Jet drive thread - 7/20/2008 4:52:18 PM   
fvega


 

Posts: 14
Joined: 7/20/2008
From: Snohomish, WA, USA
Status: offline 		Thanks for the advise, any thought about Grupner vs. KMB for jet drive unit?

(in reply to DRAGONFIRE81M)
       Post #: 1428

RE: The Unofficial all things Jet drive thread - 7/20/2008 4:54:50 PM   
j.m.


 

Posts: 2415
Joined: 9/20/2007
From: Raleigh, NC, USA
Status: offline 		graupner:
Cheap. less flow. Less thrust. Cheap.

KmB:
Expensive. Best of the Best. You pay for what you get.

_____________________________

!Signature your in it put, this read to time the took you If
If the World didn''t suck, then we would just fall off.

(in reply to fvega)
       Post #: 1429

RE: The Unofficial all things Jet drive thread - 7/20/2008 5:43:02 PM   
Quicksilver



Posts: 729
Joined: 7/27/2006
From: Oneonta, NY, USA
Status: offline
quote:

ORIGINAL: j.m.

graupner:
Cheap. less flow. Less thrust. Cheap.

KmB:
Expensive. Best of the Best. You pay for what you get.


lmfao! I hope no one actually takes that as advice

_____________________________

Game''s over, losers! I have all the money. Compare your lives to mine and then kill yourselves. -Bender

(in reply to j.m.)
       Post #: 1430

RE: The Unofficial all things Jet drive thread - 7/20/2008 5:53:22 PM   
j.m.


 

Posts: 2415
Joined: 9/20/2007
From: Raleigh, NC, USA
Status: offline 		why not?

_____________________________

!Signature your in it put, this read to time the took you If
If the World didn''t suck, then we would just fall off.

(in reply to Quicksilver)
       Post #: 1431

RE: The Unofficial all things Jet drive thread - 7/20/2008 5:57:17 PM   
DRAGONFIRE81M


 

Posts: 1154
Joined: 1/9/2007
From: PORTLAND, TN, USA
Status: offline 		they both have pros and cons . kmb is a great drive you do pay more then what you get motly in shipping . and you cant water cool like you can from the grumpner . the grumpner is a lot cheaper then the kmb. there more lighter dudy drive but you can water cool and the cost of shipping and the price of the drive is a lot less then the kmb . but quick should chime in since he has had both drive

< Message edited by DRAGONFIRE81M -- 7/20/2008 5:58:15 PM >

(in reply to Quicksilver)
       Post #: 1432

RE: The Unofficial all things Jet drive thread - 7/20/2008 11:45:55 PM   
Quicksilver



Posts: 729
Joined: 7/27/2006
From: Oneonta, NY, USA
Status: offline 		I just dont think KMB's are all that. I've explained my view on this several times(in this thread even), every time getting more condensed.

Really theyre both cheaply made, basically the same design and I just dont get how anyone can say there's a difference in thrust. Unless you've got something to back such a statement with, it's utter bs. The impellers are almost identical, other than the diameter.

The only thing I like about the KMB drives over the Graupner is the bearing on the motor side and the built in motor mount. However, when I'm throwing 16cells of power through a 700sc motor, I doubt that bearing does much.


I just did a cost comparison. If you live in the states, it will cost you roughly $123 US to get a 28mm KMB drive. A graupner unit(29mm) will run you just about half that $65. You could buy two graupner drives for the price of a KMB. Add to this the ability to replace a Graupner impelller and I cant see one valid reason to buy a KMB drive.....

I could go further but I've already said it before.

I feel the statement made earlier was unfounded and ignorant.

< Message edited by Quicksilver -- 7/20/2008 11:46:44 PM >

_____________________________

Game''s over, losers! I have all the money. Compare your lives to mine and then kill yourselves. -Bender

(in reply to DRAGONFIRE81M)
       Post #: 1433

RE: The Unofficial all things Jet drive thread - 7/20/2008 11:58:46 PM   
DRAGONFIRE81M


 

Posts: 1154
Joined: 1/9/2007
From: PORTLAND, TN, USA
Status: offline 		one small thing about the impeller on the kmb you can replace it they sell them now. thanks for the oppenon on these drive quick

check out the bottom of the page http://www.jet-drive.de/cms/component/option,com_virtuemart/page,shop.browse/category_id,4/Itemid,17/

also i have gotten the nitro vee with a .26 ofna motor going just got done running two tanks on it . it still has the stock vee drive line in it but im going to run to hobby lobby to pick up a 29mm drive for it . qiuck if you still have your vee you mite wont to hang on to it .

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


< Message edited by DRAGONFIRE81M -- 7/21/2008 12:10:22 AM >

(in reply to Quicksilver)
       Post #: 1434

RE: The Unofficial all things Jet drive thread - 7/21/2008 12:39:34 AM   
j.m.


 

Posts: 2415
Joined: 9/20/2007
From: Raleigh, NC, USA
Status: offline 		straight from a car, too.

_____________________________

!Signature your in it put, this read to time the took you If
If the World didn''t suck, then we would just fall off.

(in reply to DRAGONFIRE81M)
       Post #: 1435

RE: The Unofficial all things Jet drive thread - 7/21/2008 1:06:28 AM   
DRAGONFIRE81M


 

Posts: 1154
Joined: 1/9/2007
From: PORTLAND, TN, USA
Status: offline 		well yes it started life as a new ofna .26 that i put a GO water jacket on .

(in reply to j.m.)
       Post #: 1436

RE: The Unofficial all things Jet drive thread - 7/21/2008 1:11:56 AM   
j.m.


 

Posts: 2415
Joined: 9/20/2007
From: Raleigh, NC, USA
Status: offline 		i would suggest a new pipe for more top end.
like this:
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXZ558&P=7

_____________________________

!Signature your in it put, this read to time the took you If
If the World didn''t suck, then we would just fall off.

(in reply to DRAGONFIRE81M)
       Post #: 1437

RE: The Unofficial all things Jet drive thread - 7/21/2008 1:16:59 AM   
DRAGONFIRE81M


 

Posts: 1154
Joined: 1/9/2007
From: PORTLAND, TN, USA
Status: offline 		sorry im not posting to fell update on here till it gets the jet drive . the fell post is on the nitro forum under the nitro vee . im only useing this pipe to brake in the motor . i have a mac 3.5 pipe on the way just didnt wont to wait on it .

(in reply to j.m.)
       Post #: 1438

RE: The Unofficial all things Jet drive thread - 7/21/2008 4:45:26 AM   
Quicksilver



Posts: 729
Joined: 7/27/2006
From: Oneonta, NY, USA
Status: offline
quote:

ORIGINAL: DRAGONFIRE81M

one small thing about the impeller on the kmb you can replace it they sell them now. thanks for the oppenon on these drive quick


also i have gotten the nitro vee with a .26 ofna motor going just got done running two tanks on it . it still has the stock vee drive line in it but im going to run to hobby lobby to pick up a 29mm drive for it . qiuck if you still have your vee you mite wont to hang on to it .


touche! you've got me there

Yeah I'm not selling the nitro vee, all my boats are in dry dock right now. This car thing this summer is killin me. However I finally scored a vehicle, for some reason my avatar has not changed yet. Got an Acura CL

< Message edited by Quicksilver -- 7/21/2008 4:46:05 AM >

_____________________________

Game''s over, losers! I have all the money. Compare your lives to mine and then kill yourselves. -Bender

(in reply to DRAGONFIRE81M)
       Post #: 1439

RE: The Unofficial all things Jet drive thread - 7/21/2008 11:12:06 AM