Today's Message Index:
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1. 05:52 AM - Re: Exhaust wrap/insulation ? (Geoff Heap)
2. 06:26 AM - Re: Prop bolts (catz631@aol.com)
3. 07:02 AM - Re: Prop bolts (Bob Borger)
4. 07:15 AM - Re: Prop bolts (John Pletting)
5. 07:21 AM - Re: Prop bolts (lucien)
6. 03:55 PM - Re: Re: More on ethanol (Noel Loveys)
Message 1
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| Subject: | Re: Exhaust wrap/insulation ? |
Thanks to all that replied. I like Roger's method with the wrap.
It suits my purpose well because I only want to use it to protect lines that pass
close by. Mainly coolant. I would wrap only those area's of the exhaust. Many
thanks. I love this list. I started building from plans in 1991. I still have
a handwritten letter that I wrote to Chris Heinz about a small mod to my Slat
spars. He marked it up with a few extra rivets and wrote that it would be fine.
He replied quite quickly. I think thats about the time that I had my 286
Arche Rival......Geoff
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=282694#282694
Message 2
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Thanks for the input on the prop bolts guys. What does the 8.8 mean. Does
it mean grade 8, and 8mm or has it do do with the thread.
Dick Maddux
Milton Fl
Message 3
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Dick,
Check: http://www.mcmaster.com/param/html/AboutCapScrewMaterial/
McMaster has lots of great information associated with their products on their
web site.
Bob Borger
Europa XS Monowheel, Intercooled Rotax 914, Airmaster C/S prop
On Thursday, January 21, 2010, at 08:21AM, <catz631@aol.com> wrote:
>
Message 4
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Hi Dick---The numbers on the head of metric capscrews indicate the
strength--In this case, 8.8 tells us that this metric capscrew is equal
in strength to an american made grade 5 capscrew (indicated by 3 equally
spaced radial marks on the head [100,000 to 120,000 lbs. tensile
strength]). 10.9 on a metric hex head capscrew equals grade 8 american
specs (150,000 to 160,000 lbs/sq. in.). John Pletting--Vancouver WA.
----- Original Message -----
From: catz631@aol.com
To: rotaxengines-list@matronics.com
Sent: Thursday, January 21, 2010 6:21 AM
Subject: Re: RotaxEngines-List: Prop bolts
Thanks for the input on the prop bolts guys. What does the 8.8 mean.
Does it mean grade 8, and 8mm or has it do do with the thread.
Dick Maddux
Milton Fl
Message 5
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Here's another good basic chart on bolt grades:
http://www.boltdepot.com/fastener-information/Materials-and-Grades/Bolt-Grade-Chart.aspx
The grading system for metric and English sized bolts is slightly different with
different units of measurement, etc. But there's a rough equivalence between
some of the grades like 8..8 metric vs 5 English.
The grades that manufacturers seem to choose for prop bolts for 912 class props
are 8.8 for metric and grade 5 for English. Some manufacturers like Powerfin
use stainless steel hardware (with, of course, specific installation requirements
like they have to thread into mounting lugs in the flange and fairly precise
torque requirements).
These grades have the ductility required for that application. Harder bolts tend
to be too brittle and have more risk of failure.
But by now you should see bolts ain't all that simple ;)
LS
--------
LS
Titan II SS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=282710#282710
Message 6
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| Subject: | Re: More on ethanol |
I've never tried any fuel with ethanol in it... but from what I've read
they describe vinyl-ester as being ethanol resistant... Whatever that means.
Apparently that's what they are making the underground fuel tanks out of
now. They are supposed to have a twenty year guarantee. What that covers
who knows.
Noel
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Dave
Austin
Sent: January 20, 2010 10:13 PM
Subject: Re: RotaxEngines-List: Re: More on ethanol
How does a vinyl-ester gas tank handle ethanol as apposed to epoxy or poly?
Anyone know?
Dave Austin
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