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Kaiser Kirk

Lightbringer and former European Imperialist

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Wednesday, June 20th 2007, 5:44am

Fokker G-1s

Included in the Dutch news summary was mention of the G-1s entering service.

These two planes are the G-1 versions the Dutch are placing in service in late 1934 and 1935 in conjunction with FW-187As they hope to order from Germany.

The primary version is the G-1A "Aircruiser", basically a fighter bomber. The G-1C is a "Heavy Fighter", The G-1A differs primarily in a larger nacelle, boasting a larger bomb bay, a second crewmen, and twin GAST MGs in a tail turret in comparison to the G-1C. These two versions share both engines (currently Jumo 211Bs) and wings. A second Aircruiser version, the G-1B, (not shown) is still in development with radial engines, currently attaining 287kts with a pair of 1,050hp P&W R-1830-66 Twin Wasps, but designed with the forthcoming Hercules in mind.

The G-1A and C are both equipped with twin 23mm Madsen cannon, and 4x 7.92mm MGs forward (as the historic plan), while the A has the addition rear twin GAST MG. Ammo is included in user weight, which includes an additional 50lbs for the radio, etc.

All performance specs are at max. weight.

=============================================

G.1 A

General Type:
Airplane = 1
Airship = 2
Orbiter = 3
1

Year of First Flight: 1933

Description

Carrier or Rough Field
Monoplane
Twin Fuselage

Aircruiser version of G.1, twin inline Jumo 211Bs, internal 440kg bombload, forward 4x7.92mm & 2x 23mm Madsen, rear twin GAST 7.92mm MG in powered turret. 2 man crew.



Characteristics:

Weight (maximum) 13,900 lbs
Weight (empty) 10,818 lbs

Length 36 ft
Wingspan 54 ft
Wing Area 384 sq ft
Sweep 3 degrees

Engines 2
Jumo 211B
Piston

1,183 hp
at 15,000 ft


Crew 2


Typical cost $0.060 million in 1934
Total number procured 160


Performance:

Top Speed 331 kts = 381 mph
at 15,000 ft
Mach N/A

Operational Ceiling 37,750 ft

Range 756 nm = 871 miles
with 1,133 lbs payload
1,197 lbs released at halfway point

Climb 2,380 fpm

Cruise 170 kts = 196 mph
at 15,000 ft

Corner Speed 232 KIAS =
292 kts at 15,000 ft
Mach N/A
Turning Rate 20.2 deg/sec
Radius 2,797 ft



Internal Data:

Intake / Fan Diameter 10 ft

Bypass Ratio 96.5

Engine Weight 1455 lbs
Overall Efficiency 23 percent

Structural Factor 1.00

Number of Wings 1
Number of Fuselages 2

Limiting Airspeed 390 kts
Wing Ultimate g Load 8.78 g
Wing Taper 0.3
Wing Thickness at Root 1.4 ft

Tail / Canard Factor 0.4

Number of Nacelles 1
Length 18.5 ft
Diameter 3.5 ft
Fullness 0.3

Fuselage Diameter 3.4 ft
Fuselage Fullness 0.1

Pressurized Volume 0 percent
Cargo Decks 0

Cleanness 79 percent
Unstreamlined section 1.9 sq ft

User equipment 1,940 lbs

=============================================

Aircraft Type or Name:

G.1 C

General Type:
Airplane = 1
Airship = 2
Orbiter = 3
1

Year of First Flight: 1933

Description

Carrier or Rough Field
Monoplane
Twin Fuselage

Fighter version of G.1, twin inline Jumo 211Bs, internal 200kg bombload, forward 4x7.92mm & 2x 23mm Madsen, 10mm armor.



Characteristics:

Weight (maximum) 12,200 lbs
Weight (empty) 10,251 lbs

Length 36 ft
Wingspan 54 ft
Wing Area 384 sq ft
Sweep 3 degrees

Engines 2
Jumo 211B
Piston

1,183 hp
at 15,000 ft


Crew 1


Typical cost $0.058 million in 1934
Total number procured 160


Performance:

Top Speed 337 kts = 388 mph
at 15,000 ft
Mach N/A

Operational Ceiling 40,000 ft

Range 756 nm = 871 miles
with 442 lbs payload
467 lbs released at halfway point

Climb 2,852 fpm

Cruise 180 kts = 207 mph
at 15,000 ft

Corner Speed 232 KIAS =
292 kts at 15,000 ft
Mach N/A
Turning Rate 23.2 deg/sec
Radius 2,439 ft



Internal Data:

Intake / Fan Diameter 10 ft

Bypass Ratio 96.5

Engine Weight 1455 lbs
Overall Efficiency 23 percent

Structural Factor 1.00

Number of Wings 1
Number of Fuselages 2

Limiting Airspeed 390 kts
Wing Ultimate g Load 10.00 g
Wing Taper 0.3
Wing Thickness at Root 1.4 ft

Tail / Canard Factor 0.4

Number of Nacelles 1
Length 12 ft
Diameter 3.5 ft
Fullness 0.3

Fuselage Diameter 3.4 ft
Fuselage Fullness 0.1

Pressurized Volume 0 percent
Cargo Decks 0

Cleanness 79 percent
Unstreamlined section 1.9 sq ft

User equipment 1,655 lbs

This post has been edited 2 times, last edit by "Kaiser Kirk" (Jun 20th 2007, 5:46am)


2

Wednesday, June 20th 2007, 7:31pm

Interesting choice of the Gast gun as rear armament. Which one? The WWI 7.92x57 or just the name and mech in a new gun?

Performance seems good, especially speed, for such a large aircraft. I have my concerns over the structural strength which I've mentioned before.

Kaiser Kirk

Lightbringer and former European Imperialist

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3

Wednesday, June 20th 2007, 11:47pm

The first G-1 I posted up a bit ago matched historical performance pretty well, so that part is close, but switching to much more powerful inlines with the new supercharger helped alot.

I don't recall your mention of structural concerns, but the historical G-1s were apparently well thought of and served until the German invasion, I expect them to be a pre-Lightning analog.

BTW, alternate performance specs,

Full fuel, ammo, no bombs
G-1A, max spd : 384mph climb : 2,674 fpm
G-1C, max spd : 389mph climb : 2,991fpm

light weight
G-1A, max spd : 389mph climb : 3,127 fpm
G-1C, max spd : 392mph climb : 3,446 fpm


The GAST is an updated vesion of the WWI weapon, still in 7.92x57. As you've pointed out in the past it's a marginal benefit, two single MGs would be simpler. However, in the constraints of the conical rear turret I figured the GAST would offer the best current means of more firepower. Considering the limited application, the limited additional fiscal cost would be acceptable.

This post has been edited 2 times, last edit by "Kaiser Kirk" (Jun 20th 2007, 11:51pm)