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#Post#: 56012--------------------------------------------------
Chainsaw dyno
By: aclarke Date: March 25, 2015, 10:29 pm
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Started building an inertial dyno to help determining changes on
saw mods a couple months back in my free time,
basic frame:
[img width=337
height=600]
HTML http://i1184.photobucket.com/albums/z329/Aclarke123/Mobile%20Uploads/20150201_160941_zps2dbb04cd.jpg[/img]
#Post#: 56014--------------------------------------------------
Re: inertial dyno
By: aclarke Date: March 25, 2015, 10:33 pm
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flywheel was cut from two 1" x 16" steel plates and tig welded
together. in hindsight i should have gone with a single 2"
piece of steel to make things easier. Joe was a big help in
helping calculate the needed mass.
[img width=337
height=600]
HTML http://i1184.photobucket.com/albums/z329/Aclarke123/Mobile%20Uploads/20150205_183345_zps455d7f21.jpg[/img]
#Post#: 56015--------------------------------------------------
Re: inertial dyno
By: aclarke Date: March 25, 2015, 10:34 pm
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Blanchard ground flat...
[img width=337
height=600]
HTML http://i1184.photobucket.com/albums/z329/Aclarke123/Mobile%20Uploads/20150212_064042_zps1d4bcf2b.jpg[/img]
#Post#: 56016--------------------------------------------------
Re: inertial dyno
By: aclarke Date: March 25, 2015, 10:36 pm
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machine bore on Bridgeport for weld in Taperlock hubs
[img width=337
height=600]
HTML http://i1184.photobucket.com/albums/z329/Aclarke123/Mobile%20Uploads/20150216_060915_zps175eb927.jpg[/img]
#Post#: 56017--------------------------------------------------
Re: inertial dyno
By: aclarke Date: March 25, 2015, 10:44 pm
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lathe was too small to turn the 16" flywheel so I mickey moused
a grinder set up. Had to grind at a slight angle to preserve
the weld integrity. this was the first issue with welding two
plates. OD was less than .001 off when finished, was surprised.
[img width=337
height=600]
HTML http://i1184.photobucket.com/albums/z329/Aclarke123/Mobile%20Uploads/20150222_194242_zps0ab347ba.jpg[/img]
#Post#: 56018--------------------------------------------------
Re: inertial dyno
By: aclarke Date: March 25, 2015, 10:46 pm
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32 pin sprocket to keep flywheel speed safe
[img width=337
height=600]
HTML http://i1184.photobucket.com/albums/z329/Aclarke123/Mobile%20Uploads/20150325_180009_zps9cc83c5f.jpg[/img]
#Post#: 56019--------------------------------------------------
Re: inertial dyno
By: aclarke Date: March 25, 2015, 10:48 pm
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[img width=337
height=600]
HTML http://i1184.photobucket.com/albums/z329/Aclarke123/Mobile%20Uploads/20150325_180238_zps1fc7cf9b.jpg[/img]
#Post#: 56020--------------------------------------------------
Re: inertial dyno
By: aclarke Date: March 25, 2015, 10:49 pm
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[img width=337
height=600]
HTML http://i1184.photobucket.com/albums/z329/Aclarke123/Mobile%20Uploads/20150325_181502_zpsc8e3a0f5.jpg[/img]
#Post#: 56021--------------------------------------------------
Re: inertial dyno
By: aclarke Date: March 25, 2015, 11:03 pm
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Next step will be to mount a Kart hydraulic disc brake to slow
the flywheel. The rotating assembly will then be dynamically
balanced. I spun the flywheel up to about 4000 rpm and it was
relatively smooth in the vertical axis but when decelerating it
would vibrate laterally a small amount then go away and re
appear at a lower rpm. likely another issue stemming from
welding two plates together.
#Post#: 56027--------------------------------------------------
Re: inertial dyno
By: Gatekeeper Date: March 26, 2015, 2:18 am
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Cool stuff.
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