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-   -   Cranwell aircraft down (https://www.pprune.org/military-aviation/493675-cranwell-aircraft-down.html)

NutLoose 23rd Aug 2012 20:00

Glad all are ok.

Flying_Anorak 23rd Aug 2012 21:00

Other sources suggest the little 'grub' lost a prop blade and made a forced landing without drama, after narrowly missing the school and nuclear power station etc of course!

:)

oldmansquipper 23rd Aug 2012 22:18

There is one big school, it`s between the North & South airfields - "Sleaford Tec" of course! (or is it called Sleaford Community College these days)

;)

Pure Pursuit 24th Aug 2012 05:23

Cranwell aircraft down
 
Hope it wasn't a chop ride!

"Did I DCO sir..?"

dixb 24th Aug 2012 06:01

Dixb

Quote:
Grounded again
Is that a fact or just your assumption?

HF

Fact - as of 10am yesterday.

Hummingfrog 24th Aug 2012 11:08

Hi Dixb

Thanks for that - hope they sort it out soon as due to fly soon. At this rate we will all be out of currency:(!!

HF

622 24th Aug 2012 19:15

...You mean like the Greeks!!....I'll get my coat ;)

Lima Juliet 24th Aug 2012 19:30

The rumour I'm hearing is that it's another occurence of this...

http://www.aaib.gov.uk/cms_resources...pdf_030406.pdf

...should have bought the T67!!!

Farfrompuken 24th Aug 2012 20:06


...should have bought the T67!!!
They did. Then sold them all to go buy the Tragic Tutor!

Cows getting bigger 24th Aug 2012 20:38

Leon, would that be the Firefly which uses an extremely similar Lycoming/Hoffman combination to the Tutor? :eek:

Farfrompuken 24th Aug 2012 21:29

The firefly which had a bigger engine and a different prop.

Lima Juliet 24th Aug 2012 21:55

Cows get bigger

No that would be the T67 with nearly 60% more horsepower and a better prop to handle the torque. In fact it was a better aircraft all around, but someone in the procurement cycle was allegedly bought off by Herr Grob along the way :sad:

Better still was the delightful Bulldog, shame it was overengineered and overpriced as Beagle (not the Pruner) and Scottish Aviation had a real winner on its hands.

LJ

A and C 24th Aug 2012 22:54

Change the prop !
 
If this is another problem with the prop and at the moment it is a BIG IF then it should not be too hard to change the prop.

A number of manufacturers have props that are fitted to this engine who would jump at the chance of an order for 120 units plus a few spare.

Add the maintenance contract for prop overhaul and I am sure the package would be big enough to get the manufacture to get the certification done for next to zero cost.

The likelihood is that with the advances in blade technology the aircraft performance would also be increased.

Duncan D'Sorderlee 25th Aug 2012 17:12

Would that be the Firefly that the US got rid of because of spinning incidents?

Duncs:ok:

NutLoose 25th Aug 2012 17:31

Not just got rid of but physically crushed complete with the engines and avionics still in them.

http://www.aero-news.net/images/cont...ap-0609-1a.jpg

Hondo Aircraft Destroyed

All of RAF fireflies came through us for acceptance, as well as the replacemt trials including the Grob, we were suprised it was the winner.

Lima Juliet 25th Aug 2012 19:56

For some reason the yankee T67 had a smaller rudder than ours (t67m260) - never came out in the subsequent investigations though. So hardly surprising that they had some spin recovery problems! :ugh:

Lima Juliet 25th Aug 2012 20:05

Here's a T-3A

http://tomschrimp.com/b2evolution/media/T3Firefly.jpg

And here's a T67

http://upload.wikimedia.org/wikipedi...fly-g-bwyh.jpg

Look at the size and shape (at the bottom) between the rudders - quite a difference.

LJ

Stratofreighter 26th Aug 2012 09:47

Photos made a day after the incident are now at
Incident at Cranwell earlier? • FighterControl • Military Aviation Forum .

Also:
http://farm9.staticflickr.com/8296/7...cccba878_b.jpg

http://farm9.staticflickr.com/8424/7...77f7c545_b.jpg

http://farm9.staticflickr.com/8303/7...4e80cd10_b.jpg

NutLoose 26th Aug 2012 10:46

Looks a good result, there was a aircraft shed a blade a while back at Tollerton while doing circuit and bumps, as he touched down opened the throttle a blade departed, the engine controls he was holding ripped themselves out through the firewall as the engine tried to depart the aircraft.

Farfrompuken 26th Aug 2012 10:48

LJ

The difference in engine output between the -A and -M would necessitate the difference in rudder you note above.

ISTR the USAF losses were entirely due to the way they handled the aircraft, rather than any specific design/build issue.

T67M way superior to the Grob but that's all history anyhow.


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