Mailing List flyrotary@lancaironline.net Message #27119
From: Todd Bartrim <haywire@telus.net>
Subject: RE: [FlyRotary] Re: Aeroquip AQP Socketless racing hose question
Date: Sat, 22 Oct 2005 00:14:44 -0700
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
I asked about the heat shrink clamps, and was told in no uncertain terms NOT to use ANY type clamp.  As other have mentioned, the hose works on the Chinese handcuff principal.  Putting a clamp, particularly toward the end of the fitting actually prevents the hose from working as designed.  The operating pressure on the FC332 hose is 250 psi, with the burst pressure listed at 1000 psi.  The shop said they blew one as a test, and it blew at 1200 psi.  The hose itself blew in the middle, and the fitting remained sealed.  
This is good info and confirms what I know about it.... but I really don't know about Chinese handcuffs, although I'm wondering where you learned about them?? :-) 
 
As for the inspector, I'll have some documentation handy that shows the intended usage of the hose.  No inspector is going to insist that you go against Aeroquip's own recommendation for usage of their product.  Let's face it Aeroquip knows their product better than the inspector does :-)
Yeah, this is what I figured too and I had all kinds of documentation to back-up my statement that clamps were unnecessary, but he didn't care. I think he just wanted to put a check mark in the box beside hose clamps on his inspection list. So we compromised by using the safety wire.
    Actually I must admit that I did have a couple of spots where this hose is used but doesn't connect to the standard push-lok fittings in which case I did use a hose clamp to connect. I've slowly been changing these to eliminate them. An example would be the fuel filters & fuel pumps. After the last round of discussion about fuel systems failures after your friend met his unfortunate demise, I decided to work to eliminate any weak points in my system. I was able to get out to the airport and I removed these items. I've machined M8 x 3/8 Sweglok tube fittings for the pumps and cut of the hose barbs from the fuel filters, replacing them with a compression nut & ferrule. This allows direct connection of the filter to the pump and hoses connect directly with the proper fittings. It is now much cleaner and secure. Now if I can just find the time to go back out and reinstall them.
 
BTW, when was the last time you flew your plane Todd?  Even without a flying plane, I think I'm holding my own with you in flight hours :-)  
Don't make me repost pictures of the BUC...  :-)
This is becoming a real sore spot for me. I have just over 50 hours on it, but it's been now just over a year since I've flown it. I've had a real busy year with a short turn-around between tech school sessions resulting in 4 months away, even this past week was spent in a new course for Foxboro's Intelligent Automation, then add in a new kid, new house, building a new large shop, maintenance shutdowns, etc, etc, but by far the biggest factor has been the weather. I can't remember weather this bad in 37 years of living here. here is a clip from this mornings e-weather
Today Tonight Tomorrow Sunday Monday Tuesday
Chance of showers
Chance of showers
Chance of showers
Chance of showers
Showers
Rain
This has been the same report everyday this summer. And every time the weather forecast was wrong it was even worse than predicted. Since I have only slightly more flight hours than my plane does, it's not really desirable weather for me to fly in. Now it's been so long since I flew that I won't fly it again until my flying buddy/instructor is available to come up and do a few check rides, to ensure that I've still got it, but he's off on a new flying job and won't be available for awhile. 3 days ago a C-185 enroute from Alaska to Arizona disappeared while flying through a mountain pass about 100 miles north of here in this crappy weather, which has cooled my enthusiasm for getting back up in the air until we get some real improvement. It's not like I don't have anything to else to do anyways. Heck, I hardly have time to be a lurker on this list, but I try :-)
    So that's my excuse and I'm stickin' to it. At least we don't get hurricanes up here.
 
Todd Bartrim     (sick & tired of rain & mud)  
 
RV9Endurance
13B Turbo Rotary
C-FSTB
 
             "The world will always have a place for those that bring hard work and determination to the things they do."
Image
ATT00103.gif
Image
ATT00106.gif
Image
ATT00109.gif
Image
ATT00112.gif
Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster