Author Topic: Chainsaw dyno  (Read 966 times)

0 Members and 0 Guests are viewing this topic.

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: Inertia dyno
« Reply #20 on: December 27, 2016, 10:31:45 pm »
Second pic on on far right shows a ratchet hub (sprag) so the flywheel disengaged from the saw as soon as power is removed. Was gonna use a Torque limiter from a tractor PTO but decided on this route.
Informative Informative x 1 View List

Offline adam32

  • Piped Saw
  • *****
  • Posts: 429
  • Karma: 46
Re: Inertia dyno
« Reply #21 on: December 28, 2016, 10:10:44 am »
Sprag clutch...now your talking my lingo...the flywheel goes into autorotation ;)

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 21769
  • Karma: 519
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Inertia dyno
« Reply #22 on: December 28, 2016, 04:04:03 pm »
 :o Dang!  :o   8)

REDNECK Saw Repair Getter Done

Offline Chris-PA

  • 6 cube
  • ****
  • Posts: 209
  • Karma: 32
Re: Inertia dyno
« Reply #23 on: December 28, 2016, 09:03:54 pm »
Very nice work!

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: Inertia dyno
« Reply #24 on: December 28, 2016, 11:42:07 pm »
Thks guys. I'll post some more pics thus weekend when I get the Sensors mounted.
Like Like x 1 View List

Offline 1manband

  • Nitro Hotsaw
  • *******
  • Posts: 759
  • Karma: 52
Re: Inertia dyno
« Reply #25 on: January 04, 2017, 05:35:30 pm »
wish i could weld like that!!!  <<< 1972 cadillac

am doing some testing on a very low cost rpm sensor setup right now <$5 for DIY folks like me.  <<< 1972 volks bug
hiatus

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: Inertia dyno
« Reply #26 on: January 05, 2017, 11:54:01 am »
Joe, you get the noise issue resolved on your speed sensor test set up?

Adam

Offline 1manband

  • Nitro Hotsaw
  • *******
  • Posts: 759
  • Karma: 52
Re: Inertia dyno
« Reply #27 on: January 05, 2017, 04:02:35 pm »
Joe, you get the noise issue resolved on your speed sensor test set up?

Adam

not as of yet.  getting closer to a clearer signal, literally by moving the sensor closer to the spinning magnet.  hahaha. 

along with noise was also getting harmonics?  maybe that is not what they are called.  multiples of the actual rpm.  if it read 150 rpm, would then get 300, 600 then some wacky 300000 stuff.

for non-electrical minded folks just like me, i am trying my stab at making an rpm sensor.  the rpm sensor is the thing you need to get a homebrew inertial dyno going.  the next step is software that i am using, tweaking the output raw data into a spreadsheet to work out hp and tq.  the software is very basic... and can be used as is........but it is lacking some things i hope to bring to the table.  software as is runs on any laptop.  older ones are better to use with it, imo.  my laptop is 2 (?) years old, and am trying to get the older software to recognize my sensor.

hope to make this all clearer as i go along.

later
hiatus

Offline Nathaniel Vansickle

  • Piped Saw
  • *****
  • Posts: 468
  • Karma: 92
  • Location: Newcomerstown ,Ohio
Re: Inertia dyno
« Reply #28 on: January 06, 2017, 10:28:53 am »
Joe, you get the noise issue resolved on your speed sensor test set up?

Adam

not as of yet.  getting closer to a clearer signal, literally by moving the sensor closer to the spinning magnet.  hahaha. 

along with noise was also getting harmonics?  maybe that is not what they are called.  multiples of the actual rpm.  if it read 150 rpm, would then get 300, 600 then some wacky 300000 stuff.

for non-electrical minded folks just like me, i am trying my stab at making an rpm sensor.  the rpm sensor is the thing you need to get a homebrew inertial dyno going.  the next step is software that i am using, tweaking the output raw data into a spreadsheet to work out hp and tq.  the software is very basic... and can be used as is........but it is lacking some things i hope to bring to the table.  software as is runs on any laptop.  older ones are better to use with it, imo.  my laptop is 2 (?) years old, and am trying to get the older software to recognize my sensor.

hope to make this all clearer as i go along.

later

take a look at the universal cruise control kits if they are still available. Thats how they worked....magnet hose clamped to the driveshaft with a sensor mounted close by. installed allot of those systems back in the mid 90's.

if you can make your setup convert multiple pulses into a single revolution you could also use a tone ring off an axle and the ABS sensor....ford escapes have replaceable tone rings that are relatively cheap. i may even be able to come up with one of those to send you
5105H and 6400H in stock

Performance Outdoor Equipment
performanceoutdoorequipment.com
Dolmar, Echo, Jonsered

Informative Informative x 1 View List

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: Inertia dyno
« Reply #29 on: January 06, 2017, 08:25:38 pm »
Great idea Nate! Thank you.

 

Related Topics

  Subject / Started by Replies Last post
8 Replies
677 Views
Last post March 25, 2011, 10:58:15 pm
by sharkey
14 Replies
895 Views
Last post September 25, 2013, 04:31:19 am
by fordfairlane78
2 Replies
232 Views
Last post October 18, 2013, 08:29:46 pm
by 660magnum
3 Replies
179 Views
Last post December 02, 2013, 10:20:11 am
by Cut4fun .
3 Replies
410 Views
Last post October 19, 2014, 07:04:50 am
by SOLOmann
9 Replies
655 Views
Last post June 03, 2014, 09:36:35 am
by KilliansRedLeo
4 Replies
137 Views
Last post October 15, 2014, 03:39:36 pm
by aclarke
5 Replies
294 Views
Last post December 09, 2015, 03:36:43 pm
by Chris-PA
1 Replies
110 Views
Last post January 18, 2017, 07:04:01 pm
by 1manband
5 Replies
269 Views
Last post April 24, 2019, 07:28:52 pm
by Cut4fun .