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Forum: Tech Log

5th Jul 2014, 16:10

Replies: 29

1.5 Factor Of Safety - FAR 25.303

Views: 16,408

Posted By Bill Serger

I think Genghis summed it up best here..... ...

I think Genghis summed it up best here.....

... when referring to actual margins of safety with regard to speed... Vne - Vd.

Thanks all.

Forum: Tech Log

5th Jul 2014, 08:06

Replies: 29

1.5 Factor Of Safety - FAR 25.303

Views: 16,408

Posted By Bill Serger

So, are you saying that one could reasonably...

So, are you saying that one could reasonably expect a margin of safety of 1.22*Vd, at ultimate G loading of 1.5 x limit load?

In other words, if one were flying a Utility Category aircraft with a...

Forum: Tech Log

5th Jul 2014, 07:37

Replies: 29

1.5 Factor Of Safety - FAR 25.303

Views: 16,408

Posted By Bill Serger

Agreed... but I was actually not asking you. I...

Agreed... but I was actually not asking you. I was waiting for a reply from "Volume". But yours will suffice. :ok:

In short, a 'VG' moves to the 'left' as weight decreases.

Have you seen the...

Forum: Tech Log

5th Jul 2014, 04:45

Replies: 29

1.5 Factor Of Safety - FAR 25.303

Views: 16,408

Posted By Bill Serger

Agreed. :ok: Thanks JT!

Agreed.

:ok:

Thanks JT!

Forum: Tech Log

5th Jul 2014, 01:00

Replies: 29

1.5 Factor Of Safety - FAR 25.303

Views: 16,408

Posted By Bill Serger

You bring up a good point. At a lower...

You bring up a good point.

At a lower weight, Va/Vra actually decreases. So, are you saying more G is possible at a decreased Vra due to a lower weight?

Or can one increase G loading at the...

Forum: Tech Log

2nd Jul 2014, 22:56

Replies: 29

1.5 Factor Of Safety - FAR 25.303

Views: 16,408

Posted By Bill Serger

I am glad you brought this up, because 470 knots...

I am glad you brought this up, because 470 knots is 80 knots over Vmo for the aircraft involved, and it suffered severe structural damage.The No. 7 leading edge slat on the right wing was missing....

Forum: Tech Log

28th Jun 2014, 15:34

Replies: 29

1.5 Factor Of Safety - FAR 25.303

Views: 16,408

Posted By Bill Serger

Agreed. FAR 25.629 says, "....enlarged...

Agreed.

FAR 25.629 says, "....enlarged at all points by an increase of 15 percent in equivalent airspeed at both constant Mach number and constant altitude."

Basically that tells me it...

Forum: Tech Log

28th Jun 2014, 14:39

Replies: 29

1.5 Factor Of Safety - FAR 25.303

Views: 16,408

Posted By Bill Serger

Yes, I understand. And in fact these are not my...

Yes, I understand. And in fact these are not my mistakes, rather they are the mistakes made by someone with which I have been having a discussion.

Basically, they are asserting that FAR 25.301,...

Forum: Tech Log

28th Jun 2014, 12:35

Replies: 29

1.5 Factor Of Safety - FAR 25.303

Views: 16,408

Posted By Bill Serger

Hi Owain, Thank you for your reply. Yes, I...

Hi Owain,

Thank you for your reply. Yes, I agree FAR 25 defines many different types of loads... but would speed be considered a "load" regulated by FAR 25.303?

I always understood that 1.5...

Forum: Tech Log

28th Jun 2014, 10:15

Replies: 29

1.5 Factor Of Safety - FAR 25.303

Views: 16,408

Posted By Bill Serger

Thank you for your reply bigduke... So, if I...

Thank you for your reply bigduke...

So, if I were to state -

"a 1.5 factor of safety (yellow) is included for ALL loads that planes must withstand, not just the g-loads shown on a Vg diagram"...

Forum: Tech Log

28th Jun 2014, 08:28

Replies: 29

1.5 Factor Of Safety - FAR 25.303

Views: 16,408

Posted By Bill Serger

1.5 Factor Of Safety - FAR 25.303

Hi all,

Does the Factor of Safety of 1.5 under FAR Part 25.303 apply to speeds or just G-loads?

eCFR ? Code of Federal Regulations...

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