Boat Design Forums  |  Boat Design Directory  |  Boat Design Gallery  |  Boat Design Book Store  |  Thanks to Our Site Sponsors

Go Back   Boat Design Forums > Design > Propulsion
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 05-10-2010, 04:06 AM
Wynand N's Avatar
Wynand N Wynand N is offline
Retired Steelboatbuilder
 
Join Date: Oct 2004
Rep: 1625 Posts: 1,170
Location: South Africa
MinKota: What horsepower?

What would be the equivalent hp rating be for the following MinKota electric trolling motors?

30 ft/lb
40 ft/lb
__________________
Wynand
A scatterling of Africa
Follow my latest project here: http://www.lotus7.co.nz/forum/viewtopic.php?f=16&t=1530
My Webpage: Steel Boatbuilding: http://5psi.net
Reply With Quote
  #2  
Old 05-10-2010, 02:02 PM
Manie B's Avatar
Manie B Manie B is offline
Senior Member
 
Join Date: Sep 2006
Rep: 1474 Posts: 1,620
Location: Pretoria South Africa
I am a little out of my depth here but I have it that a 30 lb is equal to 1 hp

we had this discussion before - cant remember when - but I will have a volt and amp meter on mine so we will be able so see exactly when i am on the water
__________________
Bye bye Folks - off to see the world ~~~/)~~~ :)
Compulsive Neurotic Manic Depressive,
but basically happy :)
http://compaxboats.wordpress.com/
http://www.boatdesign.net/forums/boa...ser-27869.html
Reply With Quote
  #3  
Old 05-10-2010, 02:48 PM
apex1
Guest
 
Posts: n/a
Torqeedo has some more info on that (when I remember right), but I think 40lb is already the equivalent to 2hp!?

http://www.torqeedo.com/

Regards
Richard
Reply With Quote
  #4  
Old 05-10-2010, 04:07 PM
Ike's Avatar
Ike Ike is offline
Senior Member
 
Join Date: Apr 2006
Rep: 1356 Posts: 1,371
Location: Washington
Try this thread how many lbs of thrust is equal to 1 hp?
__________________
Ike
"Don't tell me that I can't. Tell me how I can!"
New Boatbuilders Home Page
Boat Builder News Blog
My Boating Safety Blog
Reply With Quote
  #5  
Old 05-11-2010, 03:05 AM
Manie B's Avatar
Manie B Manie B is offline
Senior Member
 
Join Date: Sep 2006
Rep: 1474 Posts: 1,620
Location: Pretoria South Africa
this on the Torqeedo site also rates 30lbs at 1 hp propulsive power

http://www.torqeedo.com/en/hn/produc...-measures.html
__________________
Bye bye Folks - off to see the world ~~~/)~~~ :)
Compulsive Neurotic Manic Depressive,
but basically happy :)
http://compaxboats.wordpress.com/
http://www.boatdesign.net/forums/boa...ser-27869.html
Reply With Quote
  #6  
Old 05-12-2010, 12:08 PM
SuenosAzules's Avatar
SuenosAzules SuenosAzules is offline
Junior Member
 
Join Date: Apr 2010
Rep: 10 Posts: 21
Location: Palm Beach Gardens, Florida
Minnkota..

I have the 30lb MinnKota.. It is equal roughly to one horsepower. Also depending on the battery you use to power it. I use an Optima 750 CCA Deep Cycle Battery. Lower CCA auto batteries will provide less thrust and wear out alot faster - Usually within two hours of continuous use.
__________________
Capt. John Banister, Marine Surveyor
Palm Beach Gardens, Florida
www.SuenosAzules.com
Reply With Quote
  #7  
Old 05-12-2010, 04:34 PM
gonzo's Avatar
gonzo gonzo is offline
Senior Member
 
Join Date: Aug 2002
Rep: 1493 Posts: 7,447
Location: Milwaukee, WI
750watts are 1HP. The electrica and gas engines have different torque curves so they only compare at maximum power.
__________________
Gonzo
Reply With Quote
  #8  
Old 05-15-2010, 11:47 AM
sparky_wap's Avatar
sparky_wap sparky_wap is offline
Junior Member
 
Join Date: Mar 2008
Rep: 35 Posts: 35
Location: Suffolk, VA USA
Less than 1 hp

The 12 v motors draw way less current than required to make 1 hp. Some of the 24 and all of the 36 volt motors pull over 1 hp (electric). I believe my motorguide 109 is rated at 1.3 kW or about 1.75 hp. Actual power at the prop is much lower and once you start moving, the current drops off.

For a 12 volt motor to draw 1 hp it wound need 74 amps not considering the efficency which would be around 70% at high load. Lets say around 90-100 amps.

At max speed, 12V trolling motors draw about 1 amp per lb of rated thrust. Half this number for 24 volt motos and 1/3rd for 36 volt motors. This is rough stab based on several motors I have messed with.
Reply With Quote
Reply



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Horsepower/Sail Area equivalence bob the builder Sailboats 54 01-20-2010 06:29 AM
How Many Horsepower Can I Have ? VKRUE Boatbuilding 9 04-08-2006 01:51 PM
The Hunley only had about seven horsepower Franklin Boat Design 1 09-16-2005 03:36 PM
Horsepower and size Ok J Propulsion 1 05-02-2005 10:20 PM
Sail horsepower vs wind force? tommc Sailboats 3 02-15-2004 01:49 PM


All times are GMT -5. The time now is 09:47 PM.


Powered by: vBulletin Copyright ©2000 - 2012, Jelsoft Enterprises Ltd.
Web Site Design and Content Copyright ©1999 - 2012 Boat Design Net