2018 Bungee group buy

[SteveR]

Re: 2018 Bungee group buy

Thrashnic, have you heard from the manufacturer on new bungees?

[t-crafter]

Re: 2018 Bungee group buy

I am going with 9090 size for my A model. The cords I took off the plane where 9/16 thick but where worn out so I am pretty sure they should be 9090,s. I would be interested in the price difference for the 9090CW. The CW or cold weather cord makes them a little stiffer.
Carlton

[M Towsley]

Re: 2018 Bungee group buy

My friend with the L-2 was wondering what was going on with this as he needs bungees. This thread seemed to have died....anyone???

[Thrashnic]

Re: 2018 Bungee group buy

Sorry, I had counted 16 bungees for bc-12s and 8 for L-2s and 4 for the A model. That is a total of 28 bungees needed and that would not be enough for a discount big enough to make it worth it. So I am considering this a Closed thread and will most likely perform a separate purchase from aircraft spruce.

[Hank Jarrett]

Re: 2018 Bungee group buy

I guess we will try again in a couple of years.

Hank

Guys, CHECK YOUR BUNGEES on your next annual! If they are getting close it will cost us all more if a group buy isn't available!

Anyone know the best way to long term store a set of bungees?

[PA1195]

Re: 2018 Bungee group buy

I guess we will try again in a couple of years.

Hank

Guys, CHECK YOUR BUNGEES on your next annual! If they are getting close it will cost us all more if a group buy isn't available!

Anyone know the best way to long term store a set of bungees?

Maybe contact these folks and ask about storage? http://www.sbcindustries.com/index.htm Probably can't hurt to store in a zip-lock plastic bag or food storage container. Not sure if temperature is critical.

Gary

[Hank Jarrett]

Re: 2018 Bungee group buy

Pretty sure extreme temps are VERY bad (freezing or above 100*) For any extended periods. Rubber we used when I was doing FF models DID NOT like very high or low temps (models used the same types of high quality rubber as bungees....we used to buy it from Italy!). I also know that there were lots of kinds of fumes that really tore up my FAI rubber. Solvents would destroy it almost immediately but the sneaky one was Ozone. If there was an electric motor near where my rubber stock was it would ruin it in only a few weeks or months.

I am pretty familiar with how to destroy the rubber. What I would like to know (and we may need someone who has worked with it professionally) is how to STORE it. I am guessing an air tight container with a moisture absorbing material sealed up and stored in a room temp area away from light (the bungee covers seem to work pretty good for that as well as their being on the bottom of the plane). Does it help to refrigerate it? How about sealing it with an inert gas (sealed with nitrogen wouldn't be that hard any more). I am guessing Oxygen is bad for it. The obvious stuff is easy. Don't get oil on it, don't get solvent on it. Don't leave in in the garage or hangar exposed to high or low heat, but what you are getting from me is worth what we are paying. It is just my best guess.

Come on, SOMEONE here must work in the industry or have a chemist background. If we could preserve them, I wouldn't mind getting an extra set and setting them aside for when I do need them. But how would a REAL expert store them (for YEARS!)

Hank

[PA1195]

Re: 2018 Bungee group buy

Shock cord info regarding aging and recommended storage: http://www.univair.com/content/Shock-Cords.pdf and http://www.comanchegear.com/LANDING%...or%20codes.pdf

Storage info is good, but that wouldn't negate the date<>time issue that some mechanics dwell on. There are AD's for some aircraft that specify hours (~500) or years (~3) before replacement. I've had them become concerned at about 5 years on various planes I've had. I usually have them replaced to minimize the mechanic's liability as always.

Gary

[Hank Jarrett]

Re: 2018 Bungee group buy

It appears that cool, no UV and "not to wet OR dry" can give us really long life. It would be nice to have an actual humidity but the way it is stated it looks like it is at least somewhere in the normal home range. I think the color coding can be handles with a log entry stating the date it was taken out of climate controlled storage.

My personal feelings are I will probably keep inspecting them and change when I see any damage or sagging. Maybe we are over thinking this. Conditional in stead of calendar. How do the A&Ps and IAs feel about it? Do you ask for what appears to be a good bungee to be changed because of the thread codes, or the condition? I think we can ALL agree when they sag or they are damaged they are toast, no matter if they are decades or days old.

Hank