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Search: Posts Made By: Jhieminga
Showing results 1 to 8 of 8
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Forum: Accidents and Close Calls
16th Feb 2024, 09:06
Replies: 100
Views: 27,298
Posted By Jhieminga

I'm no FTE, but your calculations appear to be...

I'm no FTE, but your calculations appear to be correct. Even if he didn't pull the full 4.5g he was still adding a significant amount of g to the 1.7 incurred by the load drop leading to the...
Forum: Accidents and Close Calls
12th Sep 2023, 09:29
Replies: 100
Views: 27,298
Posted By Jhieminga

There is a distinct difference between load...

There is a distinct difference between load (force) and stress. I was talking of internal stress. The stresses on the wing attachments may change significantly due to a change in total aeroplane...
Forum: Accidents and Close Calls
6th Sep 2023, 08:01
Replies: 100
Views: 27,298
Posted By Jhieminga

That analogy doesn't work. Or if you do want to...

That analogy doesn't work. Or if you do want to stick with this: When you cut the string, the lift on the balloon is appreciably more than its weight (I know, it should be mass...) which equates to a...
Forum: Accidents and Close Calls
5th Sep 2023, 12:52
Replies: 100
Views: 27,298
Posted By Jhieminga

Judging by the way the wing folded, it will be...

Judging by the way the wing folded, it will be the combined shear stress and internal bending moment at the inboard wing fittings that need to be looked at. The PA-25 has a strutted wing which could...
Forum: Accidents and Close Calls
5th Sep 2023, 09:48
Replies: 100
Views: 27,298
Posted By Jhieminga

1,250 lb is 567 kg. MTOW is 1317 kg according to...

1,250 lb is 567 kg. MTOW is 1317 kg according to Wiki. Assume a hopper that's half full, say 300 kg and a total weight around 1200 kg. Dropping that load will give you 1200/(1200-300) = 1,3 G...
Forum: Accidents and Close Calls
5th Sep 2023, 05:09
Replies: 100
Views: 27,298
Posted By Jhieminga

Just a little theory exercise: Your G is nothing...

Just a little theory exercise: Your G is nothing more than L/w, which means that by decreasing w, we're also increasing G if the rest stays the same. I don't know how much weight is in a full hopper...
Forum: Accidents and Close Calls
3rd Sep 2023, 17:20
Replies: 100
Views: 27,298
Posted By Jhieminga

Didn’t mean to imply that it was spraying crops....

Didn’t mean to imply that it was spraying crops. I just couldn’t figure out the type from the video and thought ‘Piper crop spraying type’ to be a decent approximation. The interesting question is...
Forum: Accidents and Close Calls
3rd Sep 2023, 12:12
Replies: 100
Views: 27,298
Posted By Jhieminga

Piper crop spraying type crash in Mexico.

Structural failure during a pull-up:
https://x.com/ondisasters/status/1698287725411987690?s=46&t=pcIEUl8R2uPorHJJ31eXTw
Pilot did not survive the crash.

See also:...
Showing results 1 to 8 of 8


 
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