[roc-chat] Re: Mr Dierking suggestions/observations
- From: Richard Dierking <richard.dierking@xxxxxxxxx>
- To: roc-chat@xxxxxxxxxxxxx
- Date: Sun, 19 Aug 2012 13:12:12 -0700
Excellent!
Richard
On Sun, Aug 19, 2012 at 12:28 PM, Mike Ostby <mdostby@xxxxxxxxxxxxxx> wrote:
> Like this Richard?
>
>
> Richard Dierking <richard.dierking@xxxxxxxxx> wrote:
>
> I've been using a scroll saw to cut the grooves. You could also use a
> band saw, jig saw, or hacksaw. I had an extra fin for my recent project
> and attached a photo. It's 3/16" Lexan, so sorry it looks a little weird
> in the photo. However, you can see the cuts. After the cuts, I blow out
> all the debris with an air compressor. Also I use the compressed air to
> clean the MMT after roughing it up.
>
> This greatly increases the amount of surface area for the bond.
>
> Please let us know how the fin attachment works.
>
> Richard
> On Sun, Aug 19, 2012 at 11:14 AM, Mike Ostby <mdostby@xxxxxxxxxxxxxx>wrote:
>
>> **
>> I'm going to try Richards suggestion today regarding fin attachment. I'm
>> scratch building my first dual deploy and today is fin mounting day. It's a
>> 4" BT with a 54mm MMT so there's not a lot of room to lay up fiberglass
>> - fin to MMT. (They will be glassed to the BT). So that I understand it
>> correctly, I need to "notch or groove" the root edge of the fins many times
>> aprox 1/8" deep? Thus sort of creating a serrated edge giving much more
>> surface area for bonding. Thinking of just using a bench grinder (the edge
>> of the grinding wheel) to make the notches. Is this the idea Richard? I've
>> not epoxied the aft centering ring yet so I'm able to still apply fillets.
>>
>> Mike Ostby
>>
>
>
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