Mike,
A few years ago, Lancair was selling 9394 which was gray. I used this to attach my belly pan. Most recently (last year), they sent me 9360. When I asked, I was told they change products every so often and carry whatever is current and they said I should use the 9360 for a 320/360. The 9360 is blue.
When I purchased my kit, the owner threw in the original 9339 for me. Yay! 15 year-old Hysol. Not sure what to do with that.
I’ve been buying it a quart at a time, but I’m still a long way from closing out my wings. I’ll probably buy some more when I’m ready to close out my horizontal stabilizer/elevators. We’ll see what they recommend at that time.
I’ve been sticking to using what Lancair recommends each time, but you probably won’t have any issues with what you have, either, if the properties are that close.
-Rob
Lancair 360 MkII (15% complete)
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Mike Baudhuin
Sent: Wednesday, August 14, 2013 7:52 AM
To: lml@lancaironline.net
Subject: [LML] Wing closing epoxy
I am preparing to close a set of wings and have some questions about Hysol epoxy. I've reviewed previous posts and there hasn't been much said for awhile, perhaps because wings are coming from factory closed now.
I went to Aircraft Spruce and said "I need six quarts of Hysol." They sold me six quarts of Hysol. I used it to epoxy in a fuel drain and probe and was asked by Matthew Colliers why it wasn't blue. So, I looked closer at my manuals and saw that it calls for epoxy and flox if temperatures are below 70 degrees and Hysol 9339 if temperatures are above 70 degrees. I then went to the Lancair website and found they don't even carry Hysol 9339, but have changed to Hysol 9360. The product Aircraft Spruce sells is Hysol 9430. Lancair tech support says they don't know why 9360 is specified. "That was selected by the guy before me."
"This new and improved Hysol glue replaces the old EA-9410-2 glue. EA-9430 has the same characteristics as the EA-9410, but has a 50 minute pot life instead of the 30 minute pot life of the EA-9410 at 77°F. Used extensively in the Strojnik S2A sailplane and many other homebuilts."
Locktite tech support and the data sheets show the pot life, tensile and shear strenght to be almost identical. The one difference I can find is that the 9360 specifies shear at different temperatures while 9430 specifies the shear strenght only at 77 degrees. The guy from Locktite couldn't explain the differences, and said "they appear to be very similar products". Can anyone tell me what makes the 9360 product better suited for Lancair wings? Is there a reason not to use the six quarts of 9430 in my fridge? |
Mike Baudhuin