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01-21-2022, 05:30 PM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 5,119
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Tip measuring micro
We all use Micro Balloons mixed in epoxy as a filler. It works great, but what happens if you need another batch? The different batches are slightly different densities and sand at different rates. It can cause irregularities in the surface. My Mentor, Dave Paule gave me this idea.
Micro Balloons are light. It's too light to weigh accurately. However, it is basically a liquid. It's very viscous. Measure it by volume.
Use a huge syringe to measure the micro balloons. It pours out really fast. If it won't flow, just pour it. No need for the plunger.
I cut the tip off the syringe at the widest point. Hold a finger over it. Pour in micro. Release the finger and it flows out like water. Turn it upside down to dump the residual in the bottom or you'll have a mess. Just keep track of the measurements and every batch will be very similar in density.
__________________
Larry Larson
Estes Park, CO
wirejock at yahoo dot com
Donated 12/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved (3,000+ hours)
Empennage, wings, fuse, finishing kit done. Working FWF
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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01-22-2022, 04:13 AM
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Join Date: Jul 2007
Location: Keller, TX
Posts: 279
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Larry - you always have great stuff!
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01-22-2022, 06:04 AM
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Join Date: Oct 2005
Location: 08A
Posts: 10,714
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Coffee can and a small measuring cup. Pretty easy to settle on how many cups per 100 grams of resin, or whatever recipe you like.
Pouring micro tends to put too much of it in the air.
__________________
Dan Horton
RV-8 SS
Barrett IO-390
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01-22-2022, 08:36 AM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 5,119
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Delete
Quote:
Originally Posted by DanH
Coffee can and a small measuring cup. Pretty easy to settle on how many cups per 100 grams of resin, or whatever recipe you like.
Pouring micro tends to put too much of it in the air.
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Maybe the Moderators should delete this thread. I don't want anyone, including mysef, to incur liability.
__________________
Larry Larson
Estes Park, CO
wirejock at yahoo dot com
Donated 12/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved (3,000+ hours)
Empennage, wings, fuse, finishing kit done. Working FWF
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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01-22-2022, 09:07 AM
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Join Date: Dec 2009
Location: Boulder, CO
Posts: 5,264
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We can leave the thread up... but if anyone has a few tips for eliminating the micro or Cab-O-Sil floating around in the air, I'd be interested.
Perhaps one could leave the nozzle of the shop vac near the operation to suck the errant particles up.
Dave
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01-22-2022, 09:10 AM
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Join Date: Jul 2016
Location: Worland, Wyoming
Posts: 2,174
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IDK about you guys but I just always wear a mask when I use the stuff. I think just about anything will put the micro in the air.
__________________
Jereme Carne
PPL
RV-7A Flying as of 03/2021
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01-22-2022, 12:09 PM
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Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,970
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especially
Quote:
Originally Posted by jcarne
IDK about you guys but I just always wear a mask when I use the stuff. I think just about anything will put the micro in the air.
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Same and especially for Cabo...
__________________
Bob
Aerospace Engineer '88
RV-10-ER
N464RL
Going to Paint at Evoke!
Garmin G3X-T, Barrett EFII S32, CAI, MTV-9B
Dues+ Paid 2021,...Thanks DR+
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01-22-2022, 02:22 PM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 5,119
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Cloud
Quote:
Originally Posted by David Paule
We can leave the thread up... but if anyone has a few tips for eliminating the micro or Cab-O-Sil floating around in the air, I'd be interested.
Perhaps one could leave the nozzle of the shop vac near the operation to suck the errant particles up.
Dave
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That's my concern. The particles from mixing are nothing compared to the cloud from sanding. Yes, I wear a respirator and today I used a vacuum attached to the sander.
Particles don't magically dissappear. Even if you don't see the cloud, they are still airborne. Turn off the lights and shine a flash light.
I'm going to try running my bildge blower to pull air out of the shop. Maybe some of the particulates will go out.
I wonder if a big air cleaner would help? Probably have to clean it a lot.
__________________
Larry Larson
Estes Park, CO
wirejock at yahoo dot com
Donated 12/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved (3,000+ hours)
Empennage, wings, fuse, finishing kit done. Working FWF
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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