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Author Topic: Spitfire V  (Read 1113 times)

funked

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Spitfire V
« on: February 29, 2000, 07:45:00 PM »
Shouldn't the engine cut out under negative gees?
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Offline gatt

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Spitfire V
« Reply #1 on: March 01, 2000, 01:33:00 AM »

Hummm, I thought it was a problem only for early Marks. Should be interesting to know wich MkV we have here now.

Some late war MkV's were real demons. Fd?  
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"And one of the finest aircraft I ever flew was the Macchi C.205. Oh, beautiful. And here you had the perfect combination of italian styling and german engineering .... it really was a delight to fly ... and we did tests on it and were most impressed." - Captain Eric Brown

Offline Jochen

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Spitfire V
« Reply #2 on: March 01, 2000, 02:28:00 AM »
I think it should. Even many early IX's did not have the negative G carb, let alone V's. I guess late war V's with clipped wings did have same carbs as the IX's so they should not cut under neg G's. But I think our V is early war V because of colour scheme and it engine should indeed cut under neg G.

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jochen Gefechtsverband Kowalewski

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funked

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Spitfire V
« Reply #3 on: March 01, 2000, 07:25:00 AM »
Gatt, good point.  I know there were V's serving until late in the war, some with modifications to improve performance.  Maybe the neg-g carb kit was part of it?

[This message has been edited by funked (edited 03-01-2000).]
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Offline fd ski

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« Reply #4 on: March 01, 2000, 08:48:00 AM »
I don't remember the details of top of my head, but i think the solution to this problem was NOT a neg-G carborator...
The fuel flow valve was modified in late Mk I's in such a fashion that it alliviated the cut-off problem ... something about simple but ingenious modification...

I'll see if i can find more details.



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Offline Nashwan

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Spitfire V
« Reply #5 on: March 01, 2000, 01:26:00 PM »
A woman called Schilling at the RAE devised a small diaphram to fit in the carb that prevented cut-out in negative G manouevers. This was developed during the BOB so all later Spits should have at least this protection against cut out. Later Spits had better pressurised carbs, iirc.
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Offline juzz

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« Reply #6 on: March 01, 2000, 11:30:00 PM »
They still cut out though. I think Packard really fixed it when they started making the engines under license.
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Offline Pyro

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« Reply #7 on: March 04, 2000, 03:59:00 PM »
Depends on the time-frame of the Spit V.  Dec 41 is when they ordered retrofits of the carb mods to the MK V.



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funked

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Spitfire V
« Reply #8 on: March 05, 2000, 10:58:00 PM »
Hehee key word is "ordered".  I "ordered" some pizza at the 99 WB Con and I still haven't received it.  
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Offline gatt

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Spitfire V
« Reply #9 on: March 06, 2000, 01:35:00 AM »

Funked, are you talking about Pizzaware 3.0?
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"And one of the finest aircraft I ever flew was the Macchi C.205. Oh, beautiful. And here you had the perfect combination of italian styling and german engineering .... it really was a delight to fly ... and we did tests on it and were most impressed." - Captain Eric Brown

Offline Karnak

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Spitfire V
« Reply #10 on: March 07, 2000, 10:41:00 AM »
Juzz,
the Mk V should not have the neg-G cut out.  A few did, but the vast majority were fuel injected.  The first Spitfire to use the Packard Merlin was the Mk XVI, which I have read nothing particularly good about and was not introduced until after the Griffon equipped Mk XIV.  Only the Mk I and Mk II should be affected by the float carbarater.

Sisu
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funked

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Spitfire V
« Reply #11 on: March 07, 2000, 11:15:00 AM »
Here's what I meant:  The AFDU report on the Fw 190A-3 written in summer 1942 mentions that both the Spitfire V and IX were having trouble in combat with engine cutout under negative gees.  So whatever mods had been ordered in 1941 had obviously not been carried out by mid-1942.
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Offline Nashwan

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Spitfire V
« Reply #12 on: March 07, 2000, 12:07:00 PM »
The problem with ADFU reports is that they usually recieved pre-production British planes for tests. Just because the plane they were using didn't have it doesn't mean it wasn't standard fit.
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Offline SnakeEyes

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« Reply #13 on: March 07, 2000, 01:57:00 PM »
It does if you're a LW weenie like Funked.  

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funked

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Spitfire V
« Reply #14 on: March 07, 2000, 10:08:00 PM »
Nashwan - good point.  However they weren't just referring to their test article, they were referring to planes in service as well.
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