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Forum: Rotorheads

8th Nov 2017, 18:44

Replies: 212

225 cleared to fly in UK & Norway

Views: 116,954

Posted By AnFI

riff raff just a hypothetical question How...

riff raff
just a hypothetical question
How many gearboxes would you have to run and for how long under what conditions
to demonstrate a catestrophic in service failure rate of < 10^-9 per hour?
...

Forum: Rotorheads

26th Oct 2017, 22:58

Replies: 212

225 cleared to fly in UK & Norway

Views: 116,954

Posted By AnFI

Geoffers: "the fact that there were two...

Geoffers: "the fact that there were two 'qualities of gear wheel out there"
Do you mean two different (conformal) Curvatures of Tapered roller bearing?

and

GreyHorizons: "How strong is rope...

Forum: Rotorheads

22nd Oct 2017, 18:26

Replies: 212

225 cleared to fly in UK & Norway

Views: 116,954

Posted By AnFI

Henra do you say that because the failure in this...

Henra do you say that because the failure in this exceptionally complex gearbox was downstream of the gearing concerning combination of engines?
If so
I'm not sure in Nada is the right analysis....

Forum: Rotorheads

21st Oct 2017, 19:43

Replies: 212

225 cleared to fly in UK & Norway

Views: 116,954

Posted By AnFI

The multi engined helicopter is inherently more...

The multi engined helicopter is inherently more likely to have catestrophic failures of this kind.
This must be taken into account when weighing the upsides of engine redundancy.

(Anyone know why...

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