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#191
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Letter to the FAA
Read my post and T8 from 5/27.....
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#192
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Not sure what you are trying to say here Charlie. I've read the posts and...?
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#193
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Letter to the FAA
Sounds like a 337 is involved.
I am no expert, I am only passing on info in this thread. |
#194
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Letter to the FAA
That was done in 1982. When field approvals were still being done.
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#195
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Letter to the FAA
Any reason why rope-cutting guillotines (like we have in winches) aren't installed in tow planes? Regardless of the design of the hook, surely redundancy (as long as it doesn't increase the risk of an unintended release, which would potentially be more problematic on tow than on the winch).
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#196
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Letter to the FAA
On Monday, July 3, 2017 at 4:22:54 PM UTC+3, John Wells wrote:
Any reason why rope-cutting guillotines (like we have in winches) aren't installed in tow planes? Regardless of the design of the hook, surely redundancy (as long as it doesn't increase the risk of an unintended release, which would potentially be more problematic on tow than on the winch). I believe the installations with a winch to retract the tow rope after glider release also have a guillotine in lieu of a release on the tow plane end.. It might be pretty tricky to design an installation with both a release and a guillotine on the tow plane end without: 1) having the guillotine hanging way off the back of the tow plane, and mounted to what? 2) having the tow rope attachment/pull point much further forward than usual, and potentially difficult to hook up/unhook 3) being able to release the rope in flight (or while taxiing) without cutting the rope and without risk of the rings (or whatever) fouling on the guillotine. I'm not sure why a guillotine would add any more risk. There are already plenty of ways for PTT to happen, and glider towing should always be performed in a way that makes PTT safe at any point during the takeoff. |
#197
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Letter to the FAA
At 13:22 03 July 2017, John Wells wrote:
Any reason why rope-cutting guillotines (like we have in winches) aren't in= stalled in tow planes? Regardless of the design of the hook, surely redund= ancy (as long as it doesn't increase the risk of an unintended release, whi= ch would potentially be more problematic on tow than on the winch). Our aerotow ropes have weak links at both ends, a weak one at the glider end and a stronger one at the tug end. Normally the glider weak link goes but if the tug takes the rope through the hedge the the tug end goes and no harm - except to the tug pilot's reputation. Chris |
#198
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Letter to the FAA
Walt,
Can you give an update on your letter to the FAA regarding this incident? Regards, Gerald |
#199
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Letter to the FAA
Gosh, this has been a concern for many years. At least one way to look at this is to consider is it a problem? There are recorded instances of glider pilots becoming too high on the tow plane early on tow resulting in lifting the tail of the towplane driving it into the ground. Killing the tow pilot. It is well known if you lift on the tail-installed tow release with enough force, the Schweizer tow release may not function. The soaring community can not ignore the problem. I remember when we installed the Tost tow release on our tow planes many years ago. We felt it best to have our installation (easy) approved by an FAA inspector. He took a simple look at the installation and approved it on the spot. The Tost tow release is a low cost item and easy to install. |
#200
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Letter to the FAA
Walt - there's an STC for inverting the hook? Can you provide any details, I can't find it. That would be a straightforward solution...
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