Notices
RC Boats General Discussion Discuss general rc boating topics here.

prop test tank

Old 02-19-2010, 01:25 PM
  #1  
ekim1940
Member
Thread Starter
 
Join Date: Apr 2008
Location: jacksonville, IL
Posts: 43
Likes: 0
Received 0 Likes on 0 Posts
Default prop test tank

I have built a prop test tank to check KVA and watts for my motors . I have a AMP & WATT meter from Hobby City and I can check what each prop will produce on each motor . I can chenge battery's and props to get the max for my KVA .Also you can check to see if you have your ESC program right . It is a must it will supprise you about youe set up.
Attached Thumbnails Click image for larger version

Name:	Vt58839.jpg
Views:	27
Size:	88.9 KB
ID:	1382410  
Old 02-19-2010, 10:28 PM
  #2  
DONS BOAT WORKS
Senior Member
My Feedback: (3)
 
DONS BOAT WORKS's Avatar
 
Join Date: May 2004
Location: Sanger, CA
Posts: 1,113
Likes: 0
Received 0 Likes on 0 Posts
Default RE: prop test tank

Cool!!!
Old 02-20-2010, 12:12 AM
  #3  
Ron Olson
My Feedback: (1)
 
Ron Olson's Avatar
 
Join Date: May 2002
Location: Kalamazoo, MI
Posts: 18,688
Likes: 0
Received 20 Likes on 17 Posts
Default RE: prop test tank

You can vary the depth of the water also to see what a difference that makes but from the setup I think that it will do it by itself! You're going to toss a lot of water out of that box in no time.
Old 02-20-2010, 12:38 AM
  #4  
wave waker
Senior Member
 
Join Date: Aug 2005
Location: greendale, IN
Posts: 2,544
Likes: 0
Received 0 Likes on 0 Posts
Default RE: prop test tank

nice idea and initiative, keep posting of result and video of the testing..
Old 02-20-2010, 09:53 AM
  #5  
Justaddwata
My Feedback: (3)
 
Justaddwata's Avatar
 
Join Date: Feb 2005
Location: RI-USA, RI
Posts: 6,152
Received 8 Likes on 8 Posts
Default RE: prop test tank

Just curious what you will really be learning from this setup. I could see some value with a gas or nitro as a means of breaking in a motor or getting a carb adjusted. But I am not sure it will give much real world info on a prop setup for a motor as a boat will move and lower the resistance the prop has on the water. Unless your thinking of a tug boat setup where you will just me moving water from a possible stationary boat. Just curious
Old 02-20-2010, 11:03 AM
  #6  
ekim1940
Member
Thread Starter
 
Join Date: Apr 2008
Location: jacksonville, IL
Posts: 43
Likes: 0
Received 0 Likes on 0 Posts
Default RE: prop test tank

This post is to justaddwater I ran my boats last year and they were not as fast as i thaugh they should be . With the test tank I found out they were not achieving full watts and amps . I am running 36/74 inrunners with 1778 t0 2800 kva . If you are licky enough to get all the from the manifactor one of the motor was listed as 1000 watts and the setup I was using was only producing 560 watts not enough and the amps was far below what it should be .By using the test tank I was able to get the watts up and and amps where they should be .I also have atac so I can register the prop speed . For me it works without puting the boat in the water and not over amping the speed control . Thank You for your remarks
Old 02-20-2010, 12:58 PM
  #7  
c-cat
Senior Member
 
Join Date: Nov 2007
Location: Mt. Clemens, MI
Posts: 131
Likes: 0
Received 0 Likes on 0 Posts
Default RE: prop test tank

I think justaddwata meant, the test set up may be an overload situation. Static water infeed vs. dynamic. If your boat tops out at 50mph, shouldn't the tank water be doing 50mph (prior to) the prop?
Not pickin on ya, it is a cool idea, fun one too I bet.
Old 03-02-2010, 09:55 PM
  #8  
c-cat
Senior Member
 
Join Date: Nov 2007
Location: Mt. Clemens, MI
Posts: 131
Likes: 0
Received 0 Likes on 0 Posts
Default RE: prop test tank

After some thought on the test tank possibilities, give this some thought. A circular tank, with a central hub. (think whirling sprinkler) Motor and drive-train on one end, counter weight on the other. With this set up the water remains as it should, at rest, while the propeller travels across it. A rudder can be placed behind for drag realizm as well as water pickups. revolutions can be monitored and calculated into speed. Electrics will need a radio box with power supply centrally mounted, while gas engines will need be only throttled. Definate possibilities. Hmmmm,
Old 03-03-2010, 12:40 AM
  #9  
Ron Olson
My Feedback: (1)
 
Ron Olson's Avatar
 
Join Date: May 2002
Location: Kalamazoo, MI
Posts: 18,688
Likes: 0
Received 20 Likes on 17 Posts
Default RE: prop test tank

If I were going to make a testing tank I'd have it so that I could place the hole boat in there (yeah, it would have to be a big tank so get the cattle out of the way!) so that I could hold the boat in place somewhat and hook the hull up to a fishing scale to measure pounds of thrust.
Old 03-03-2010, 09:06 AM
  #10  
cyclops2
 
cyclops2's Avatar
 
Join Date: Dec 2005
Location: Frenchtown, NJ
Posts: 3,054
Received 4 Likes on 4 Posts
Default RE: prop test tank


It is good for comparing one of the same item against another. Prop to prop...motor to motor...etc.
Old 03-03-2010, 11:32 AM
  #11  
TCHedOff
Senior Member
 
Join Date: Jul 2005
Location: Center City, MN
Posts: 711
Likes: 0
Received 0 Likes on 0 Posts
Default RE: prop test tank


ORIGINAL: Ron Olson

If I were going to make a testing tank I'd have it so that I could place the hole boat in there (yeah, it would have to be a big tank so get the cattle out of the way!) so that I could hold the boat in place somewhat and hook the hull up to a fishing scale to measure pounds of thrust.
We used the son's inflatable pool once - should have seen how wet the wife & I got!!

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.