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- FM/DM threads (http://forum.fulqrumpublishing.com/forumdisplay.php?f=196)

- - Spit Mk1 Boost? (http://forum.fulqrumpublishing.com/showthread.php?t=26128)

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We're saying the same thing btw, no need to argue.

There is no argument at all. I was trying to help you guys find answers to your questions about these machines.

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RR maybe 1-2 months

I don't know as I would have to see the actual timeline. I highly doubt it though.

Changes to aircraft do not generally happen overnight. First the change has to be thoroughly tested because the safety margins are by their very nature very tight in aviation.

Once approved, it can't happen overnight either. The changes have to be disseminated to the folks who will implement them. They need the knowledge to enact the change.

Just as important, the people making those changes need the resources to enact it. That means the manufacturer has to retool or reset the production lines, train employees, and get the new parts made. Making enough for the aircraft in service is just the tip of the iceberg too. You have to have enough replacement parts sitting on the shelves to keep the airplanes in service flying. The standard rule of thumb is one part on the airplane, three replacements on the shelf.

So if you have 25 airplanes, you need 100 parts in total.

Of course once the part is made, it still has to reach the flight line too.

In short, it has to be approved, disseminated, manufactured, and distributed before anyone picks up a screw driver to loosen up the first screw to make the change. On average, that process took ~6months in WWII for most designs. The more technical the change, the longer and vice versa.

Just because a memo says it was approved does not mean it was in operational use from that day forward.

Maybe the +16 lbs were allowed for Sea Hurricane IA that operated from CAM ships (catapult armed merchantman) without the possibility to land - engine life is not a problem in this case.

Since Sea Hurricanes were in service in Feb 1941, then the +16lb boost Merlins were available in 1940 since it took, according to you, ~6 months.

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Originally Posted by TomcatViP (Post 339337)

So you throw the insults. I respond politely to calm you down and then you add another layer of bullshit ?

Where is your mum that I made an urgent request for some (boosted) slap on your pinky butt ? That also I hev done and was rather good :twisted:

Just to remind you after reading BlkDg post : btw 1940 and 1944 there was Four (4) years of harsh technological development. If they had such boosted Merlin, the MkII would hve been called a MkIX etc.. etc..

WHen dealing with history You need to put things in perspective or you end with acrobatic assumptions such as where we are now.

When dealing with a fleet of airplane at war you need to understand taht factory made does not mean fleet wide or you'll end to say that the F35 is actually in full service just because a couple have just been delivered to an instructor unit (both wings are still on guys ;)) .

And by the way I did alrdy put RR data on the forum. It does not say 17lb at all : 9 lb max op boost at rated alt. And it was in late 1940 early 41 (cant remember).

I would come back latter for the max boost and alt question but I think I (we) hve alrdy discuss this one alrdy. Just remind that that the boost (the supercharger) was not there for max low speed but for increasing the climb rate and maximizing the overall speed at alt. As I hve alrdy said this is not a car tuning. You don't plug the biggest supercharger to get the max peak power.

~S

PS: the FM of the spit is more of a concern for me
PSS : I am (wwe are) not historian(s). Instead of recreating evidences we shld stick to what are the data in the literature. There is enough to discuss on how any data cld impact the FM. Valec as alrdy post a realy good link to source out any perfs

This is really nothing short of an offensive and obtuse post. I am afraid I had to report it.

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Since Sea Hurricanes were in service in Feb 1941, then the +16lb boost Merlins were available in 1940 since it took, according to you, ~6 months.

Interesting. You are the first source I have seen that makes that claim. Most agree that the prototype Sea Hurricane was flying by Feb 1941.

Most other sources agree that it was not until ~July 1941 that it became operational.

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Once the Fleet Air Arm took delivery of the Hurricanes from the RAF, starting with 880 squadron in March 1941 and 804 squadron in April 1941 it then started the mamoth task of shipping the Hurricanes to operational squadrons in all theatres around the world. A large consignment was shipped out in HMS Furious to 807 squadron in Gibraltar on 1 July 1941 (eg V7301 and V7623). Whilst others were shipped to South Africa in SS City of Bombay on 9 January 1942 (eg Z4056). Half a year later further consignments were shipped out on SS Belgian Seaman to Takoradi from Liverpool on 30 June 1942 (eg BP709), and to Simonstown in SS Lt St Lonbert Brie thence to 800 sqn on HMS Indomitable in July 1942 (eg V7416). However, quite a number were lost with the HMS Eagle which sank on 11 August 1942.

http://www.fleetairarmarchive.net/ai.../hurricane.htm

Sounds kind of like EXACTLY what I told you is typical....

The first carrier borne Sea Hurricane kill was recorded on July 31 1941, by Sea Hurricanes operating from HMS Furious. The type must have been operational some months sooner with development occurring from mid to late 1940 to early 1941. However, this does not mean that all Sea Hurricanes used 16lb boost right from the beginning. I suspect that the 16lb boost mod was not made until late 1941/early 1942. Brown, in Wings of the Navy, mentions that it was used for the Sea Hurricane IC which had the Hurricane IIC, 4 x 20mm cannon wing, grafted onto a Sea Hurricane IB airframe.

The squadron formed at Arbroath in January 1941 as a Fleet Fighter squadron with 3 Martlet Is, intended for the still uncompleted HMS Indomitable. The squadron was augmented with 3 Sea Gladiators and 9 Sea Hurricane IAs untill replaced with Sea Hurricane Ibs in July 1941.

The first Sea Hurricanes joined No 880 squadron at Arbroath, Scotland, in January 1941. In July 1941, they joined their aircraft carrier, ‘HMS Furious’.

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Fleet Air Arm took delivery of the Hurricanes from the RAF, starting with 880 squadron in March 1941 and 804 squadron in April 1941

Sounds like operational trials.

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then started the mammoth task of shipping the Hurricanes to operational squadrons

Sounds like General Service adoption.....

Performance data for Spitfire Mk1 with 12 and 16lb boost:

http://www.spitfireperformance.com/s...-rae-12lbs.jpg

*Fake (or very highly suspicious) !

pls refer to my earlier post if ever needed regarding power increase Vs speed