A revised version of the WW He-100A. The reduction in power at altitude cut the top speed a bit, but not a huge amount. Kaiser Kirk and I did a bit of research a while back on self-sealing fuel tanks and came up with a rule of thumb for them: 20% of the protected fuel weight (which isn't too bad on short-ranged aircraft but gets to be pretty heavy pretty fast on heavy bombers or patrol planes).
On the top speed, I'm not so sure that this version would be that much slower than the original. Why? Because I've got a He-100D in Planebuilder that's EXACTLY right, and there are IS one difference in this version that will lower drag: the wing thickness at the root is thinner. It makes the plane a bit heavier, but it does make it faster. Keep in mind that the D series aircraft historically had radiator, not evaporative, cooling and had a top speed of about 416 mph.
Aircraft Type or Name:
Heinkel He-100 A-1
General Type:
Airplane = 1
Airship = 2
Orbiter = 3
1
Year of First Flight: 1939
Description
Carrier or Rough Field
Monoplane
Conventional Fuselage
The WW version of the He-100D, equipped with 2 15mm MG-151 heavy machineguns in the wing roots and 2 7.92mm MG-17s in the nose decking, a 10mm armored seat for the pilot (+130 pounds), and self-sealing fuel tanks (+96 pounds).
Characteristics:
Weight (maximum) 6,000 lbs
Weight (empty) 5,068 lbs
Length 29 ft
Wingspan 33 ft
Wing Area 177 sq ft
Sweep 1 degrees
Engines 1
DB-601N
Piston
1,179 hp
at 16,000 ft
Crew 1
Typical cost $0.030 million in 1939
Total number procured 2000
Performance:
Top Speed 355 kts = 408 mph
at 16,000 ft
Mach N/A
Operational Ceiling 39,000 ft
Range 600 nm = 691 miles
with 157 lbs payload
164 lbs released at halfway point
Climb 2,949 fpm
Cruise 250 kts = 288 mph
at 28,000 ft
Corner Speed 247 KIAS =
316 kts at 16,000 ft
Mach N/A
Turning Rate 22.4 deg/sec
Radius 2,738 ft
Internal Data:
Intake / Fan Diameter 9.5 ft
Bypass Ratio 89
Engine Weight 1320 lbs
Overall Efficiency 22.5 percent
Structural Factor 1.00
Number of Wings 1
Number of Fuselages 1
Limiting Airspeed 450 kts
Wing Ultimate g Load 10.00 g
Wing Taper 0.5
Wing Thickness at Root 1 ft
Tail / Canard Factor 0.4
Number of Nacelles 0
Length 9 ft
Diameter 3.25 ft
Fullness 0.45
Fuselage Diameter 3.75 ft
Fuselage Fullness 0.35
Pressurized Volume 0 percent
Cargo Decks 0
Cleanness 85 percent
Unstreamlined section 1.15 sq ft
User equipment 1,050 lbs