a regular carbide bit for wood cuts well.  the secret is to get the larger
diameter bit , otherwise they constantly clog up.  I believe I used one

cut like 1" dia.  The 1/2" bits for like mortising hinges won't work.

cut in the direction that the bit wants to travel and it is easier to take

small amount with each pass.  For the wells that I routered, I cut them

to the full depth, but remained maybe 1/8 to 1/4" inside my lines.  Then I
worked to the finish cut line at full depth.   WEAR GLASSES!  What? Huh?

yes, and ear protection!  I machined the 1/2" plate to shape on the

similarly after cutting it close first with a bandsaw with like a 6
tooth/inch blade.  The engine mount plate took a good chunk of a Saturday

make, but they run $500 to buy.  The plate ran $75.  I used the oil pan as

template for the bolt holes.  My first engine mount plate I made these

templates, which was a bunch of work and not that necessary.  We're

1 airplane, right? (no, you couldn't afford me to make you one too! :-)  I
did use a mill to cut the engine mount pockets.  We had started to use the
mill to make all of the plate and decided I could do it by hand much

Kevin Lane  Portland, OR
e-mail-> n3773@comcast.net
web-> http://home.comcast.net/~n3773
(browse w/ internet explorer)
----- Original Message ----- From: "Jack Ford" <jackoford@theofficenet.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, March 02, 2005 2:24 PM
Subject: [FlyRotary] Re: 20B exhaust (so far)


> Hey Kevin,
>
> What kind of bit are you using in that router? How deep can you cut
> (Aluninum, I assume)?
>
> Sounds like a poor man's end mill.
>
> Jack Ford
>
>
> ----- Original Message ----- > From: "kevin lane" <n3773@comcast.net>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Wednesday, March 02, 2005 1:56 PM
> Subject: [FlyRotary] Re: 20B exhaust (so far)
>
>
>> Todd - my first engine mounting plate had the exhaust even closer.  I
>> bite
>> the bullet and fabricated another one which moved the block forward

>> which also solved a water pump/fire wall clearance problem and the
>> starter
>> nose clearance too. I am getting pretty good at freehanding a router to
>> machine the plates.  I even have pockets up front routered out for

>> savings, all done free hand (just go 1/16th" at a time, and keep your
> mouth
>> closed! chips go everywhere).
>>     Thanks for the info.  I have some welding curtain material I use

>> protection which seems to work well.  I wrapped my Lycoming starter in

>> since a cross over pipe comes close.
>> Kevin Lane  Portland, OR
>> e-mail-> n3773@comcast.net
>> web-> http://home.comcast.net/~n3773
>> (browse w/ internet explorer)
>> ----- Original Message ----- >> From: "Bartrim, Todd" <Steve.Bartrim@canfor.com>
>> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>> Sent: Wednesday, March 02, 2005 11:58 AM
>> Subject: [FlyRotary] Re: 20B exhaust (so far)
>>
>>
>> Hi Kevin;
>> My exhaust didn't work out exactly as I'd envisioned it and as a
>> result the pipe is almost touching 2 of my mount struts where it passes
>> between them. I was quite concerned about heat damaging the mount, so I
>> kept a very close eye on this area. However it really hasn't been an
>> issue. The paint on the mount hasn't discoloured at all so I haven't
>> been too concerned, however I still check it often. When I first
>> received the EM2, I attached one of my spare CHT thermocouples to the
>> mount to monitor it and while I can't recall the temp, I know it was

>> enough that I stopped worrying about it. I should've logged it.
>>
>> Todd
>>
>>
>>
>> this is a good point and I admit to have not thought it through yet.  I
>> have made two engine mount plates so far because the first one had the
>> exhaust almost touching the exhaust, maybe 1/8" clearance.  I will have
>> to come up with some type of shield however.  I hope, also, to

>> some fresh air flow over them also.
>> Kevin Lane  Portland, OR
>>
>> >
>> > I'm curious if you're planning some kind of heat shield for that

>>
>> > strut that runs between the exhaust pipes... or maybe several layers
>> of
>> > exhaust tape... something to keep some of that heat away anyhow?
>> Looks
>> > scary to me, especially when you consider that those exhaust tubes
>> will
>> > likely be glowing red at full throttle.  Just a thought.
>> >
>> >  <Marv>
>>
>>
>> >>  Homepage:  http://www.flyrotary.com/
>> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>>
>>
>> >>  Homepage:  http://www.flyrotary.com/
>> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>>
>
>
>>>  Homepage:  http://www.flyrotary.com/
>>>  Archive:   http://lancaironline.net/lists/flyrotary/List.html


>>  Homepage:  http://www.flyrotary.com/
>>  Archive:   http://lancaironline.net/lists/flyrotary/List.html