[roc-chat] Re: Fin Jig for Large Daimeter Airframes - 5.5 inch diameter or larger
- From: "Lesnick, Mike" <mikel@xxxxxxxxxxx>
- To: <roc-chat@xxxxxxxxxxxxx>
- Date: Wed, 21 Dec 2011 13:02:30 -0500
Joe, Thanks, a picture would be great
Mike
Michael Lesnick
Axiom Healthcare Group
18135 Santa Lauretta Cir
Fountain Valley, CA 92708
714-594-5720 - Office Phone
714-323-5968 - Cell
714-968-7076 - Fax
MikeL@xxxxxxxxxxx
From: roc-chat-bounce@xxxxxxxxxxxxx
[mailto:roc-chat-bounce@xxxxxxxxxxxxx] On Behalf Of J Charles Conway
Sent: Wednesday, December 21, 2011 6:30 AM
To: roc-chat@xxxxxxxxxxxxx
Subject: [roc-chat] Re: Fin Jig for Large Daimeter Airframes - 5.5 inch
diameter or larger
For Mike Lesnick
Regarding a fin tool:
I have come up with a simple inexpensive method of holding the fins
straight and have now used
this method on airframes up to 10" in diameter. I also make the same
type of tool to fit over the
motor tube so that I can fiberglass the base of the fin to the motor
tube for more strength before
assembling the fin section. One or two tools can be used depending on
the size/length of the fins.
These tools only cost a few $ each and are reusable.
To make the tool first cut a piece of min 3/8 " Baltic Birch plywood so
that it is about 2x the total
spread of the fin outline. Starting in the center draw fin slot lines
the exact width of the fins exactly
vertical and long enough to slip over the fins. Then cut out a very
accurate center hole to match
the size of the tube you are mounting the fins to. Next cut out the fin
slots and add an additional
cut out at the base of the slots to allow the tool to slip off over
epoxy fillets that will be added at
the base of the fin when it is mounted. The tool is now ready to use.
For motor tube mounting place very accurate fin alignment lines on the
tube then slip the tool over
the tube to about 40% up the fin from the aft end. and then slip the
fins through the tool and carefully
align each with the fin line drawn earlier. Then 5 min epoxy the fin in
place being sure to that
all is properly aligned. The tool will hold the fin in that position
until the epoxy hardens. Then fully
fiberglass the fin in place above the tool for each fin and let harden.
Lastly pull off the tool and
finish the fiberglass on the fin mounts.
So far I have ended up with exact positioned totally straight fins
using this method
If you need a photo of one I take a pix for you.
- Joe C. Email: joecc100@xxxxxxxxx
- Joe C.
________________________________
From: "Lesnick, Mike" <mikel@xxxxxxxxxxx>
To: roc-chat@xxxxxxxxxxxxx
Sent: Tuesday, December 20, 2011 4:13 PM
Subject: [roc-chat] Fin Jig for Large Daimeter Airframes - 5.5 inch
diameter or larger
Does anyone have thought and advice on use of fin jigs (to hold fins
straight while under construction) for larger airframes (over 5inches in
diameter)?
* Can you buy them if so what sources?
* Other options?
* Necessary & How Valuable?
Thanks
Mike
Michael Lesnick
Axiom Healthcare Group
18135 Santa Lauretta Cir
Fountain Valley, CA 92708
714-594-5720 - Office Phone
714-323-5968 - Cell
714-968-7076 - Fax
MikeL@xxxxxxxxxxx
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