Not to worry.  The RTV is not captive .  The diameter of the

iron

housings

(where the shrink tubing goes) is smaller than the rotor

housings.  If

the

RTV wants to expand, it can go into the rotor housing.  I like

(& used)

the

idea of applying a bit of RTV to the area around the shrink

tubing.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

"Brian D. Cain" wrote:

Tracy, I've had a bit of not good luck w/ the heat shrink
wrap around the tension bolts on Tony's engine here.  The problem I

believe

has
to do w/ thickness of the tubing; I can heat-shrink wrap each

tension bolt

twice
over, overlapping by about 3/4" to 1" on both layers, and get the

bolt in,

but the
added snugness of the bolt against the centre iron housing is making

it

somewhat
difficult to get the threads to line up on the front iron housing so

the

bolt screws
in.  I've got 15 of 18 in currently and am having to back 3 of them

out to

either
re-do the heat-shrink or remove it all together and do the RTV alone

trick.

B

        Brian,

          You might try running a thread die up the threads then

chucking the

 bolt in a lathe and turning a slight taper to the end of bolt. Then

back off

 the die to clean up and straighten the threads. This might make it

easier to

 start the bolt IMHO.

        Kelly Troyer

I didn't have a problem like this when I did my engine but Kelly's idea
sounds good if you do.
Being a bit less "formal", I'd probably just bevel the end of the bolt by
twirling it on my belt sander.   No die cleanup needed this way.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2002 All world wide rights reserved.