NASA log paddle wheel installation

[Refueler]

I haven't mentioned polyester - so please don't try to mis-quote me.

You seem to follow Paul everywhere .. he follows you as well .....

Maybe you should also stop mis-reading many of mine as well .... ??

Call it quits eh ?

 

[pvb]

*deleted* - there's no point wasting my time

 

[ghostlymoron]

This is what is said in the instructions
"Drill a hole of 42mm diameter to take the skin fitting and use conventional methods
for sealing. It is advisable to avoid the use of mastic materials - use a form of propri-
etary silicon sealant. The securing nut has a groove on its underside which should
also be filled with sealing compound. Finger tighten this nut only. After the sealing compound has enter wipe off the excess and encapsulate the whole assembly in G.R.P. as shown in the diagram. Take care to ensure that a minimum of 20mm ofthread is left uncovered. The paddle wheel unit can now be slid into the housing,
with the arrow pointing along the centre line of the vessel. It is recommended that a
little silicon grease be smeared over the rubber "O" ring to keep the unit free."
I don't see a reference to proprietary body filler.

 

[Refueler]

This is what is said in the instructions
"Drill a hole of 42mm diameter to take the skin fitting and use conventional methods
for sealing. It is advisable to avoid the use of mastic materials - use a form of propri-
etary silicon sealant. The securing nut has a groove on its underside which should
also be filled with sealing compound. Finger tighten this nut only. After the sealing compound has enter wipe off the excess and encapsulate the whole assembly in G.R.P. as shown in the diagram. Take care to ensure that a minimum of 20mm ofthread is left uncovered. The paddle wheel unit can now be slid into the housing,
with the arrow pointing along the centre line of the vessel. It is recommended that a
little silicon grease be smeared over the rubber "O" ring to keep the unit free."
I don't see a reference to proprietary body filler.

The 'body filler' mention comes from another contacting NASA for advise to clear this up ..... NASA mentioned it and person then posted ..

What NASA say about installing their paddle wheel through-hull

 

[Hoolie]

The instructions I have for installing the NASA EML-2 log are similar. But they specify "a proprietary brand of marine silicone sealant" (their bold letters) and "recommend" "the whole assembly be fibre glassed into the hull".

For this unit they have increased the diameter to the 51mm/2in standard widely used by Airmar and others. The through hull fitting looks more robust than the earlier 42mm fitting described above.

 

[Rhylsailer99]

I would not worry too much as I am sure hundreds of these have been installed using mastic type sealants. I would glass it into the hull as per recommendations and leave it for a few years. At least with it glassed in there is no possibility of a disaster.

Perhaps ring NASA and see what they say?

- W

It's been preying on my mind now for so long so just bought another thru hull. This time I will use silicon sealant and west epoxy. Last time I used the worst ever with polyester resin and 5200 oops.