Wattflyer RC Network: RC Universe :: RCU Magazine :: RCU Forums :: RCU Classifieds :: RCU User Reviews :: RCU YouTube
Home Who's Online Calendar Today's Posts RealTime Post Spy Mark Forums Read
Go Back   WattFlyer RC Electric Flight Forums - Discuss radio control eflight > R/C Electric Power - Batteries, Chargers, ESCs and More > Power Systems
Register Members List Wattflyer Extras Articles Search Today's Posts Mark Forums Read Social Groups

Power Systems Talk about motors, ESC speed controllers, gear drives, propellers, power system simulators and all power system related topics

Thank you for your support (hide ads)
Reply
 
Thread Tools Display Modes
Old 12-16-2010, 12:33 AM   #1
Stevephoon
Member
 
Stevephoon's Avatar
 
Join Date: Aug 2005
Location: White Lake, MI
Posts: 992
View Stevephoon's Gallery67
Thanked 100 Times in 99 Posts
Club: United Flying Organization
iTrader: (0)
Friends: (7)
Default Post Picts of Your Motor Test Stands

All,

I am thinking about building a motor test stand. Something where I can try different props/motors/batteries/ESCs... and measure the current, voltage and thrust. I already have a WattsUp Meter which should be able to give me some Volts/Amp/Power readings that I can use. I'd like some ideas on how to build a mechanical stand that can safely hold a motor and can measure thrust.

There is an old thread here which shows Dr.Kiwi and RagBag's setup. Is anyone doing anything different or are they basic variations of this idea?

http://www.wattflyer.com/forums/showthread.php?t=322


Right now I only have realtively small motors to test. My biggest motor is 11/12 V with a max rating of 38 amps (3542-10 from HeadsUpRc.com) This is the motor I need to test, but other smaller motors as well. But who knows what the future will bring!

Thanks for any input.

Steve

Growing the fleet!
Stevephoon is offline  
  Reply With Quote
Old 12-16-2010, 12:51 AM   #2
Nitro Blast
Community Moderator
 
Nitro Blast's Avatar
 
Join Date: Aug 2005
Location: Sunny San Diego Ca
Posts: 3,965
View Nitro Blast's Gallery38
Thanked 402 Times in 344 Posts
Club: Silent Electric Fliers of San Diego
Send a message via MSN to Nitro Blast
Awards Showcase

100mph Speed Demon  3kW  1kW  WAA-08 Pilot 
iTrader: (20)
Friends: (67)
Default

Steve,
When I was all wet, I built a test stand by putting one of those wood motor stands on some drawer slides, and using a digital fishing scale had thrust. With the laser temp gun and a syringe, I had fuel consumption and temp readings. It was a real nice rig.

When I got into electric, I tossed it to a friend.

All my test stands now have wings.


I would be interested in seeing what you work out, if it isnt a big project, I may tag along with ya and do it too.

Electricity... It's not just for light bulbs anymore.

GoProfessional Cases industry grade protection for your gear

Dinogy Lipos professional grade energy

Project Globetrotter Participant 7/09
Wings Across America Participant 6/10
Nitro Blast is offline  
  Reply With Quote
Old 12-16-2010, 03:15 AM   #3
Dr Kiwi
Super Contributor
 
Join Date: Aug 2005
Posts: 1,726
Thanked 180 Times in 174 Posts
Awards Showcase

Outstanding Contributor Award 
iTrader: (0)
Friends: (3)
Default

A more recent thread of mine: http://www.rcgroups.com/forums/showt...t=thrust+stand


Attached Thumbnails
Click image for larger version

Name:	Eagle Tree Speed sensor 008 640.jpg
Views:	384
Size:	219.5 KB
ID:	140605  
Dr Kiwi is offline  
  Reply With Quote
Old 12-16-2010, 03:44 AM   #4
Stevephoon
Member
 
Stevephoon's Avatar
 
Join Date: Aug 2005
Location: White Lake, MI
Posts: 992
View Stevephoon's Gallery67
Thanked 100 Times in 99 Posts
Club: United Flying Organization
iTrader: (0)
Friends: (7)
Default

Dr Kiwi,

Thanks for the links on RcGroups. I haven't gotten around to searching over there yet. Right now I'm thinking of building something like your setup, but I need to do some more searching and research.

I have a couple of goals.

1st is to perform some basic tests on motors before I mount them into a plane. This is to make sure the motor/prop/ESC/Battery are all working OK and are a good match for the target plane. Not serious motor testing, but more of a system validation of all components before being installed in a plane. Also a place to trouble shoot when a system is not acting as expected.

2nd is to spend no money on the test rig. (Well, the least possible.) I'm hoping I can scrounge up enough materials from stuff that's just taking up space. It also needs to be able to be stored away easily....

Nitro Blast, I'll keep posting my thoughts and progress. Please feel free to follow along and offer suggestions. I know I could use the help.

Steve

Growing the fleet!
Stevephoon is offline  
  Reply With Quote
Old 12-16-2010, 07:24 PM   #5
Dr Kiwi
Super Contributor
 
Join Date: Aug 2005
Posts: 1,726
Thanked 180 Times in 174 Posts
Awards Showcase

Outstanding Contributor Award 
iTrader: (0)
Friends: (3)
Default

BalsaProducts/BPHobbies sells a simple tractor stand structure in kit form.
Dr Kiwi is offline  
  Reply With Quote
Old 12-21-2010, 03:16 PM   #6
Stevephoon
Member
 
Stevephoon's Avatar
 
Join Date: Aug 2005
Location: White Lake, MI
Posts: 992
View Stevephoon's Gallery67
Thanked 100 Times in 99 Posts
Club: United Flying Organization
iTrader: (0)
Friends: (7)
Default Getting Started!

I've decided to build my own stand out of parts I have laying around. I plan on building something similar to Dr. Kiwi's setup. He posted some plans and has a build log over on RCGroups.
http://www.rcgroups.com/forums/showt...t=thrust+stand

Dr. Kiwi also stated correctly that BPHobbies sells one as well. It's listed at $20 on their website.
http://www.bphobbies.com/view.asp?id...=V267609&img=l

As you can see from the attached pictures, I have rounded up the following parts.

1. Base: Old Particle Board shelf cut to 12 x 24. It's about 3/8 thick.
2. Motor Attachment Lever. Old Tree Stake cut down to 11 inches. It's 1 1/4 x 3/4.
3. Lever to hit the scale is an old drum stick.
4. 2 Pieces of 1/2 pine cut to 3 1/2 square for base attachment pieces.
5. I did buy a 3/16 x 12 in steel rod and sleve and a 12 tube it slides into for about $3 at the local ACE.
6. A couple of drill bit depth collars that I'm using lke wheel stops to keep the steel rod in place.

I have started on building the lever assembly. The one tool that I need that I don't have is a drill press. My holes are not 100% straight and this is causing some issues. The steel rod hole to drum stick hole is at about a 90 degree, but all of this is not square with the tree stake. So when I mount a motor I'm going to need to add in some offset to keep it square. I'll post some pictures of this when I get that far.

Hopefully I'll get this finished up today.

Steve


Hmmmmmm. I can't seem to upload pictures anymore. I'll try again a little later.

Growing the fleet!
Stevephoon is offline  
  Reply With Quote
Old 12-22-2010, 01:50 AM   #7
Stevephoon
Member
 
Stevephoon's Avatar
 
Join Date: Aug 2005
Location: White Lake, MI
Posts: 992
View Stevephoon's Gallery67
Thanked 100 Times in 99 Posts
Club: United Flying Organization
iTrader: (0)
Friends: (7)
Default

It's complete!


Some quick measurements using a 3542-10 motor from HeadsUpRC.com

These are peak values while still reusing the same battery packs. The batteries used were two 1600 mAh 3S 20C in parallel. (3200 mAh 20C)

1. TP 11x5.5 Prop. 31.8 Amps, 369.3 Watts, 62 Oz Thrust
2. GWS EP1170 34.5 Amps, 408 Watts, 66 Oz Thrust
3. XOAR Wood 11x5 28.6 Amps, 329 Watts, 56 Oz Thrust


Take a look at a quick Video of the stand and test.


Steve

Growing the fleet!
Stevephoon is offline  
  Reply With Quote
Old 12-22-2010, 02:06 AM   #8
Stevephoon
Member
 
Stevephoon's Avatar
 
Join Date: Aug 2005
Location: White Lake, MI
Posts: 992
View Stevephoon's Gallery67
Thanked 100 Times in 99 Posts
Club: United Flying Organization
iTrader: (0)
Friends: (7)
Default

I also tried an APC 11x7 Thin Electric prop but it was vibrating so bad I was afraid to test it. This was even after balacing the prop. I'll need to take a closer look at that prop.

Here's a link to a high def version of the same video as my last post. Hopefully this will look a little better.


Steve

Growing the fleet!
Stevephoon is offline  
  Reply With Quote
Old 12-24-2010, 03:50 AM   #9
Stevephoon
Member
 
Stevephoon's Avatar
 
Join Date: Aug 2005
Location: White Lake, MI
Posts: 992
View Stevephoon's Gallery67
Thanked 100 Times in 99 Posts
Club: United Flying Organization
iTrader: (0)
Friends: (7)
Default

Ahh, Picts can now be uploaded again. Someone (one of the kids?) changed the picture sharpness on the camera to superfine and this must change the jpg file size just enough that it causes issues. Same overall picture resolution (1600x1200).

Anyway, here are the picts of my crude motor test stand. It does what I need it to, so I’m happy. I have a way to quickly try out props and see current draw and get a crude guess of static thrust. It’s also for initial try outs of new motors and ESCs and debugging….

I also have now tried a PowerUp 450 sport motor also from HeadsUpRc.com I tried a GWS EP1050 prop and got very similar results to what was posted on their web site. I saw 36 oz thrust 18.5 amps and the HeadsUpRc.com web site lists 37 oz thrust at 19 amps. These again were peak values, but this time I started with a battery that was at an 80% state of charge.

If you look on the drum stick, there is a black line. This is the same distance to the motor on the other stake. Moving this around does impact the force seen. Keep them at equal distances for the best measurements!

Thanks to Dr.Kiwi for posting plans on test stands!

Steve


Attached Thumbnails
Click image for larger version

Name:	IMG_0955-small.jpg
Views:	168
Size:	126.1 KB
ID:	140879   Click image for larger version

Name:	IMG_0957-small.jpg
Views:	169
Size:	116.6 KB
ID:	140880   Click image for larger version

Name:	IMG_0958-small.jpg
Views:	169
Size:	132.1 KB
ID:	140881   Click image for larger version

Name:	IMG_0959-small.jpg
Views:	164
Size:	160.9 KB
ID:	140882   Click image for larger version

Name:	IMG_0962-small.jpg
Views:	128
Size:	121.0 KB
ID:	140883  

Click image for larger version

Name:	IMG_0963-small.jpg
Views:	219
Size:	114.1 KB
ID:	140884   Click image for larger version

Name:	IMG_0964_edited-1-small.jpg
Views:	140
Size:	119.6 KB
ID:	140885   Click image for larger version

Name:	IMG_0966_edited-1-small.jpg
Views:	130
Size:	133.9 KB
ID:	140886   Click image for larger version

Name:	IMG_0968-small.jpg
Views:	151
Size:	129.1 KB
ID:	140887   Click image for larger version

Name:	IMG_0970-small.jpg
Views:	170
Size:	154.8 KB
ID:	140888  

Click image for larger version

Name:	IMG_0973-small.jpg
Views:	246
Size:	168.7 KB
ID:	140889   Click image for larger version

Name:	IMG_0976-small.jpg
Views:	181
Size:	192.5 KB
ID:	140890  

Growing the fleet!
Stevephoon is offline  
  Reply With Quote
Reply

  WattFlyer RC Electric Flight Forums - Discuss radio control eflight > R/C Electric Power - Batteries, Chargers, ESCs and More > Power Systems

« Previous Thread | Next Thread »

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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 On

Forum Jump


All times are GMT +1. The time now is 01:04 PM.


Powered by: vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2005 WattfFlyer.com
RCU Eflight HQ

Charities we support Select: Yorkie Rescue  ::  Crohn's & Colitis Foundation



Page generated in 1.08823 seconds with 52 queries