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jbhart(at)onlyinternet.ne
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 Posted: Fri Jul 18, 2008 5:37 pm Post subject: New Battery Holder in FireFly |
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Kolbers,
When I went to change out an old battery on the FireFly, I ran into some
problems. I decided to try and come up with something simpler and lighter.
On my second attempt I came up with the following:
http://www.thirdshift.com/jack/firefly/firefly142.html
Ended up saving a little over a half a pound, and so I recovered my added
weight for strengthening the landing gear.
Flew the first time in a month today. It was just great. If I am lucky, I
will fly tomorrow morning to my EAA Chapter 373 meeting in Hagarstown.
Jack B. Hart FF004
Winchester, IN
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Sat Jul 19, 2008 2:47 am Post subject: New Battery Holder in FireFly |
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Jack,
That looks like a good solution.
I have a suggestion based on a problem we encountered on our Allegro. We used a couple SS clamps similar to those shown in your photo, to help stabilize the muffler which had a tendency to vibrate a lot and crack. Inadvertently, we had one of the clamps making a relatively sharp bend (like your 90 degree bend at the bottom of your battery) where the screw thread slits were located. With the higher stresses at the corner and the weaker part of the clamp, it broke. When we installed the replacement we positioned it so that the weak part was not at the higher stress area and had no problems since then.
Thom in Buffalo
[quote][b]
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_________________
Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
- Anonymous |
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russ(at)rkiphoto.com
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| Posted: Sat Jul 19, 2008 6:38 am Post subject: New Battery Holder in FireFly |
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Jack
NICE job on the new battery holder. Did you have to recalculate any
W&B figures? Looks like too little to affect anything.
do not archive
On Jul 18, 2008, at 10:36 PM, Jack B. Hart wrote:
| Quote: |
<jbhart(at)onlyinternet.net>
Kolbers,
When I went to change out an old battery on the FireFly, I ran into
some
problems. I decided to try and come up with something simpler and
lighter.
On my second attempt I came up with the following:
http://www.thirdshift.com/jack/firefly/firefly142.html
Ended up saving a little over a half a pound, and so I recovered my
added
weight for strengthening the landing gear.
Flew the first time in a month today. It was just great. If I am
lucky, I
will fly tomorrow morning to my EAA Chapter 373 meeting in Hagarstown.
Jack B. Hart FF004
Winchester, IN
|
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http://www.matronics.com/Navigator?Kolb-List |
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ez(at)embarqmail.com
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| Posted: Sat Jul 19, 2008 5:53 pm Post subject: New Battery Holder in FireFly |
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I used two saddles from 2" exhaust clamps and made long 5/32 U bolts.
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jbhart(at)onlyinternet.ne
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| Posted: Sun Jul 20, 2008 3:19 am Post subject: New Battery Holder in FireFly |
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| Quote: |
I have a suggestion based on a problem we encountered on our Allegro. We
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used a couple SS clamps similar to those shown in your photo, to help
stabilize the muffler which had a tendency to vibrate a lot and crack.
Inadvertently, we had one of the clamps making a relatively sharp bend (like
your 90 degree bend at the bottom of your battery) where the screw thread
slits were located. With the higher stresses at the corner and the weaker
part of the clamp, it broke. When we installed the replacement we positioned
it so that the weak part was not at the higher stress area and had no
problems since then.
Thom,
I purchased some new clamps and repositioned the bends so that no slot was
over a corner.
Jack B. Hart FF004
Winchester, IN
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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