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-   -   Underwing Ordnance? (https://vansairforce.net/community/showthread.php?t=143245)

TXFlyGuy 10-30-2016 03:18 PM

We can have these bomb racks functional as there is a release mechanism that can be used. Might not want to mention that to the friendly aviator association, however.

Mel 10-30-2016 03:32 PM

Quote:

Originally Posted by TXFlyGuy (Post 1122949)
We can have these bomb racks functional as there is a release mechanism that can be used. Might not want to mention that to the friendly aviator association, however.

Current operating limitations address this:
"If the aircraft will have removable externally mounted equipment, it must be test flown in all configurations.
An entry must be made in the aircraft records indicating the configurations flight-tested, unless the original manufacturer’s flight test data for that equipment is included in the aircraft limitations. If relying on the manufacturer’s data, the aircraft and load must conform to the manufacturer’s design and be maintained to manufacturer’s instructions. Otherwise, the aircraft owner/operator must conduct test flights in all configurations and make an entry in the aircraft records indicating the configurations flight-tested. (40)"

David Paule 10-30-2016 04:02 PM

Surprisingly, the flight envelope for releasing stores might be narrower than you'd think. I've seen movies taken of stores released where the released device came up and hit the airplane. You won't know that unless you've got a high speed camera taking a video of the event from a chase plane. The chase isn't chasing in this case, it's off your wing and well clear.

Start slowly and work up to the higher speeds and descent angles. Don't go to the next test point until you're absolutely certain that no threatening tendencies are showing up. Keep your test points close together.

And before doing all that, do a series of new flutter clearance tests.

This isn't something to be taken casually.

Dave

TXFlyGuy 10-30-2016 04:30 PM

Quote:

Originally Posted by RV8JD (Post 1122961)
In this case the external store downed the chase. (Ignore the title of the YouTube video. There was no midair collision between the two airplanes.)

https://www.youtube.com/watch?v=LBqm7asYs6Y



+1 on flutter considerations. External stores can have quite a negative impact on flutter speeds if not done correctly.

Thanks for the advice. We will have these fully tested by a professional.

SHIPCHIEF 10-30-2016 05:51 PM

Tom Hunter posted this tasteful Youtube video "Flight Testing A Small Drop Tank..."
https://www.youtube.com/watch?v=a9_TqOB6_Jk
My RV-8 has fuselage hard points that supported a 'rotationally symmetrical' muffler when I was running my Turbo Rotary engine. I could still use them to fasten a Vetterman Fuselage fairing, cargo pod or...?


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