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matford

Questions about the Curtiss Tomahawk

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Looking at what photos I can find (going by serial numbers), Mk.Is appear to have the later larger wing root of the Mk.IIs, not CUs.  Is this correct of just my imagination?

 

Did the Mk.I have a canopy horn alarm? - can't find any photos of the starboard side.

 

Is there any reliable wing panel drawings?

 

Anyone know the codes for these II (AC) Squadron Mk.I and Mk.IIBs
AH850
AK107
AK144
AK146

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 the wing geometry is same for H75/P36, H81/P40s and H87/P40D up to N:

- chord wing root: 108 in (at center line a/c)

- chord wing tip: 46.6 in

- span 37 ft 3 in 1/2

- airfoil at root: NACA 2215

- airfoil at 197 in: NACA 2209

- dihedral: 6°

 

there was a u/c horn, but I not located it

 

Edited by BS_w

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Can't help you with your serial/code combinations. Closest I can get is:

AH916 XV-U

AH934 XV-W

AH942 XV-S (all Mk.IIA's)

JDR Rawlings, Coastal, Support and Special Squadrons, p.11.

 

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1 hour ago, BS_w said:

 the wing geometry is same for H75/P36, H81/P40s and H87/P40D up to N:

 

I think he's referring to the root leading edge extension (not sure what Curtiss called it).  My gut feeling is that yes, they did have it, but I haven't bothered to check that feeling.

Edited by gingerbob

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1 hour ago, gingerbob said:

 

I think he's referring to the root leading edge extension (not sure what Curtiss called it).  My gut feeling is that yes, they did have it, but I haven't bothered to check that feeling.

Sorry, i didn't undestand correctly.
the leading edge wing fillet was the last model on Tomahawk I, the cabin air intake was in the starboard fillet.;

On the first P40Cu, the fillet was smaller so the air intake was visible on the wing leadig edge

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On 6/14/2019 at 7:54 AM, matford said:

Looking at what photos I can find (going by serial numbers), Mk.Is appear to have the later larger wing root of the Mk.IIs, not CUs.  Is this correct of just my imagination?

 

Did the Mk.I have a canopy horn alarm? - can't find any photos of the starboard side.

 

Is there any reliable wing panel drawings?

 

Anyone know the codes for these II (AC) Squadron Mk.I and Mk.IIBs
AH850
AK107
AK144
AK146

The wing root fairing was replaceable  so. doesn't necessarily correspond as a given that an early product aircraft would have it entire life

 

 The early product aircraft that may of left the factory with the smaller original root fairing could (and would) have the later larger fairing fitted... The larger fairing was a needed aerodynamic fix

 

If you at photod of early cu you will see some retrofitted with the larger one than you can see it by the mismatch panels

 

Dana Bell saw the smaller fairing in photos of the early cu and then did the research to find the documentation. .. If I recall it was a fix for a stall issue

 

 So the serial number is not a predictor of seeing the smaller versus larger fairing...it's the time of the photo.

Edited by HBBates

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@BS_w,

 

IIRC, the warning  horn for the u/c was either on the  LH side of the armored backplate that the headrest was attached to, or towards the front of the cove behind the fixed LH rear quarter plexiglass; I'm not sure which location is correct.  See item  7 in section 1 of the P-40 manual I have linked to for a description. I did find a photo that I cannot post a link to that shows the horn in the front part of the LH cove of  a P-40E, and it is labeled 'landing gear warning horn.' Perhaps you have a better photo or diagram somewhere in your extensive references? Best I can do, sorry!

Mike

 

https://www.warbirdforum.com/manual.htm

 

 

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on P40/H81, under the left rear vision there were the fuel cap filler forward and oil cap filler at rear. on P40D & up, the filler was on fuselage

so the horn could be fiited at left side under the rear vision glass.(on N model, a warning light on instrument panel replace the horn)

On some Kitty  there was a hole on right side, it was a filler for de icing fluid.

I do not found any info about the location of warning signal in P40, B&C manuals.
In the handbook of H81A(RAF) it is written "warning signal Klaxon in the cockpit", I think it was as on P36, between frames 1 & 2 at left side

or frames 3 & 4 right side for french Hawk.

Edited by BS_w

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Thanks for your help lads.  Will build AH850 as factory fresh in DuPont colours and without the mods.  Here is the list of Shiny Two's Tomahawks as far as I can find;


Curtis Tomahawk I

AH850
Purchased in USA, delivered by Curtiss, Buffalo, between 11.40-09.41 to contract A-87
268Sqn
400Sqn
2Sqn
5PAFU
1686Flt
1944.03.07, DBR
1944.04.04, SOC


Curtis Tomahawk IIA

AH899
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
1SAC
2Sqn
171Sqn
430Sqn
1683Flt
1944.02.04, Crashed in forced landing, Market Harborough

 

AH908
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
2Sqn
171Sqn
430Sqn
1686Flt
1944.05.31, SOC

 

AH909
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
2Sqn
400Sqn
171Sqn
430Sqn
19412.31, SOC

 

AH921/XV-M
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
2Sqn, Sawbridgeworth
1941.12.18, Engine cut due to fuel mishandling, belly landed, Arkeseden, Essex

 

AH927
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
1SAC
2Sqn
1941.09.12, Swung on landing and undercarriage collapsed, Sawbridgeworth
to 2923M

 

AH928
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
1SAC
2Sqn
349Sqn
1943.01.22, Swung on landing and undercarriage collapsed, Ikeja, DBR

 

AH930
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
2Sqn
171Sqn
1942.08.30, Engine cut, belly landed, Sussex House Farm, Cowden near Hartfield, Surrey, DBR

 

AH934/XV-W

Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
2Sqn
168Sqn
16Sqn
1944.12.31, SOC

 

AH940/XV-U – Medium Grey codes
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
1SAC
2Sqn “A” Flt
ME
1944.06.29, SOC

 

AH941
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
2Sqn
168Sqn
1683Flt
1943.10.01, Engine cut, belly landed, Bygrove Farm, Grandborough, DBR

 

AH942/XV-S
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
2Sqn
170Sqn
1944.01.31, SOC

 

AH945/XV-W
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
2Sqn
41OTU
414Sqn
1944.01.31,SOC

 

AH946
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
2Sqn
400Sqn
171Sqn
1942.08.28, Hit tree on approach and crashed, Gatwick, DBR

 

AH998
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84
1SAC
268Sqn
168Sqn
2Sqn
1944.01.31, SOC

 

Curtis Tomahawk IIB

AK107
Delivered between by Curtiss, Buffalo, between 12.40-10.41 to contract A-84
2Sqn
1943.12, to 4377M; NTU

 

AK144
Delivered between by Curtiss, Buffalo, between 12.40-10.41 to contract A-84
2Sqn
1942.11.25, Engine cut, stalled and spun into ground near Sawbridgeworth

 

AK146
Delivered between by Curtiss, Buffalo, between 12.40-10.41 to contract A-84
2Sqn
1942.04.23, Control lost in cloud, abandoned near Thiornaby


References:
Getty Images
II(AC) Squadron Association twosqnassoc.co.uk
Imperial War Museum, iwm.org.uk
James J. Halley - Royal Air Force aircraft: AA100-AZ999, Air-Britain, 1985
James J. Halley - Royal Air Force aircraft: AA100-AZ999, Air-Britain, 2000
 

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13 hours ago, matford said:

Thanks for your help lads.  Will build AH850 as factory fresh in DuPont colours and without the mods.  Here is the list of Shiny Two's Tomahawks as far as I can find;


Curtis Tomahawk I

AH850
Purchased in USA, delivered by Curtiss, Buffalo, between 11.40-09.41 to contract A-87 - Delivered 13th Oct 1940
268Sqn
400Sqn
2Sqn - Departed unit on arrival of first vertical camera equipped Mustang
5PAFU
1686Flt
1944.03.07, DBR - Actually Cat B damage whilst with 1686Flt, however deemed not worth repairing so re-categorised to E
1944.04.04, SOC


Curtis Tomahawk IIA

AH899
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 20th Oct 1940/Arrived UK 29MU taken on charge 16-11-40
1SAC
2Sqn
171Sqn
430Sqn
1683Flt
1944.02.04, Crashed in forced landing, Market Harborough

 

AH908 XV-A
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 22nd Oct 1940/Arrived UK 46MU taken on charge 1-12-40
2Sqn - Damaged when aircraft Force landed due bad Wx to repair
171Sqn
430Sqn
1686Flt
1944.05.31, SOC

 

AH909
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 22nd Oct 1940/Arrived UK 46MU taken on charge 5-12-40
2Sqn - Believed departed for Mods and R servicing
400Sqn
171Sqn
430Sqn
19412.31, SOC

 

AH921/XV-M
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 23rd Oct 1940
2Sqn, Sawbridgeworth
1941.12.18, Engine cut due to fuel mishandling, belly landed, Arkeseden, Essex - Originally Cat B but on works inspection found to be Cat E

 

AH927
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 24th Oct 1940
1SAC
2Sqn
1941.09.12, Swung on landing and undercarriage collapsed, Sawbridgeworth -
to 2923M

 

AH928
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 24th Oct 1940
1SAC
2Sqn - Damaged 12-4-42 cause unknown, to repair
349Sqn
1943.01.22, Swung on landing and undercarriage collapsed, Ikeja, DBR

 

AH930
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 24th Oct 1940
2Sqn
171Sqn
1942.08.30, Engine cut, belly landed, Sussex House Farm, Cowden near Hartfield, Surrey, DBR

 

AH934/XV-W

Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 25th Oct 1940/Arrived UK 46MU taken on charge 21-1-41
2Sqn
168Sqn
16Sqn
1944.12.31, SOC

 

AH940/XV-U – Medium Grey codes
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 15th Nov 1940/Arrived UK 23-12-40,
1SAC
2Sqn “A” Flt
ME
1944.06.29, SOC

 

AH941
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 25th Oct 1940/Arrived UK 46MU taken on charge 10-1-41
2Sqn
168Sqn
1683Flt
1943.10.01, Engine cut, belly landed, Bygrove Farm, Grandborough, DBR

 

AH942/XV-S -
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 25th Oct 1940/Arrived UK 46MU taken on charge 10-1-41
2Sqn
170Sqn
1944.01.31, SOC

 

AH945/XV-W
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 26th Oct 1940
2Sqn - Swung on landing and u/c collapsed 9-9-41 to repair
41OTU
414Sqn
1944.01.31,SOC

 

AH946
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 26th Oct 1940
2Sqn
400Sqn
171Sqn
1942.08.28, Hit tree on approach and crashed, Gatwick, DBR

 

AH998
Delivered between by Curtiss, Buffalo, between 12.40-09.41 to contract A-84 - Delivered 2nd Nov 1940/Arrived UK 39MU taken on charge 22-12-40
1SAC
268Sqn
168Sqn
2Sqn
1944.01.31, SOC

 

Curtis Tomahawk IIB

AK107
Delivered between by Curtiss, Buffalo, between 12.40-10.41 to contract A-84 - Delivered 4th Nov 1940
2Sqn
1943.12, to 4377M; NTU

 

AK144
Delivered between by Curtiss, Buffalo, between 12.40-10.41 to contract A-84 - Delivered 11th Nov 1940
2Sqn
1942.11.25, Engine cut, stalled and spun into ground near Sawbridgeworth

 

AK146
Delivered between by Curtiss, Buffalo, between 12.40-10.41 to contract A-84 - Delivered 11th Nov 1940
2Sqn
1942.04.23, Control lost in cloud, abandoned near Thiornaby


References:
Getty Images
II(AC) Squadron Association twosqnassoc.co.uk
Imperial War Museum, iwm.org.uk
James J. Halley - Royal Air Force aircraft: AA100-AZ999, Air-Britain, 1985
James J. Halley - Royal Air Force aircraft: AA100-AZ999, Air-Britain, 2000

 


 

Some notes added in Blue for you, you might also be missing AH822 23-3-42 to 2-8-42 and AK151 13-3-42 to 23-9-42. Dates given next to contract number are factory delivery dates, and any arrival or taken on strength dates in the UK

 

Regards

 

Buz

Edited by Buz

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