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21

Sunday, April 17th 2011, 9:14pm

Well, I went back and found the specs to the Wesworld versions of the D.XXIII and the Fw187, and I must say I'm a bit dismayed at how overpowered they seem to have ended up, especially for late 1930s designs. I guess Kirk's correct and I need to up my required specifications to account for where everyone else is.

Here's some specs for consideration. The design's about on par with the Fw187 and inferior to the D.XXIII, but I believe it's more realistic to the time period.

Quoted

[SIZE=4]Hanriot H.310[/SIZE]
[SIZE=3]General Characteristics[/SIZE]
Crew: one, pilot
Length: 11.52 m (37 ft 9 in)
Wingspan: 15 m (49 ft 2 in)
Height: 5.16 m (16 ft 11 in)
Wing area: 35.32 m² (380.04 ft²)
Empty weight: 6,208 kg (13,657 lb)
Loaded weight: 7,600 kg (16,720 lb)
Powerplant: 2× supercharged Hispano-Suiza 12Z liquid-cooled V12 engines, 1,650 hp each

[SIZE=3]Performance[/SIZE]
Maximum speed: 660 km/h (410 mph) at 6,400 m (20,990 ft)
Cruise speed: 500 km/h (308 mph)
Range: 2,200 km (1,367 mi)
Service ceiling: 9,500 m (31,168 ft)
Rate of climb: 3,850 ft/min (19.58 m/sec)

[SIZE=3]Armament[/SIZE]
- 4 × 20 mm fixed forward machine guns
- 2 × 250 kg bomb
- 8 × 130mm rockets


Quoted

[SIZE=4]Hanriot H.312 Night Fighter[/SIZE]
[SIZE=3]General Characteristics[/SIZE]
Crew: two (pilot, gunner)
Length: 11.52 m (37 ft 9 in)
Wingspan: 15 m (49 ft 2 in)
Height: 5.16 m (16 ft 11 in)
Wing area: 35.32 m² (380.04 ft²)
Empty weight: 6,208 kg (13,657 lb)
Loaded weight: 7,600 kg (16,720 lb)
Powerplant: 2× supercharged Hispano-Suiza 12Z liquid-cooled V12 engines, 1,650 hp each

[SIZE=3]Performance[/SIZE]
Maximum speed: 640 km/h (397 mph) at 6,400 m (20,990 ft)
Cruise speed: 500 km/h (308 mph)
Range: 2,000 km (1,242 mi)
Service ceiling: 10,000 m (32,808 ft)
Rate of climb: 3,850 ft/min (19.58 m/sec)

[SIZE=3]Armament[/SIZE]
- 4 × 20 mm in upward-firing turret

or

- 2x20mm in nose
- 2x20mm in upward-firing installation

Kaiser Kirk

Lightbringer and former European Imperialist

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22

Tuesday, April 19th 2011, 8:44am

Quoted

Originally posted by Brockpaine
Well, I went back and found the specs to the Wesworld versions of the D.XXIII and the Fw187, and I must say I'm a bit dismayed at how overpowered they seem to have ended up, especially for late 1930s designs. I guess Kirk's correct and I need to up my required specifications to account for where everyone else is.

Here's some specs for consideration. The design's about on par with the Fw187 and inferior to the D.XXIII, but I believe it's more realistic to the time period.


Yes, right before I stopped trying to play the game of 'keeping up' things were getting a bit much- and as I recall I deliberately shortchanged the engine power the D.XXIII was using, which limits the performance. Still, both the FW-187 series and D.XXIII cleared review and made official storylines, so they seemed relevant.

I will point out that while the D.XXIII is years earlier than the Do335, it's a scaled up version of a real Fokker and I was working on it since the early 1930s, originally under the +5 rule. Then there was Foxy's version... :) Still, with better engines...

The Hanriot H.310 also beats a plane I forgot about- my own G-1 series. The G-1C gets beat by it. Which is as it should be. The G-1C's next version would have been evolved to be more P-38ish.

Engines : While the French used- and made better versions of Hispano-Suiza....in OTL....here relations between France and Iberia only improved recently. So it could be the historic engine, or you could rebrand. :)

Always happy to complicate matters for others :)

23

Tuesday, April 19th 2011, 3:34pm

Quoted

Originally posted by Kaiser Kirk

Quoted

Originally posted by Brockpaine
Well, I went back and found the specs to the Wesworld versions of the D.XXIII and the Fw187, and I must say I'm a bit dismayed at how overpowered they seem to have ended up, especially for late 1930s designs. I guess Kirk's correct and I need to up my required specifications to account for where everyone else is.

Here's some specs for consideration. The design's about on par with the Fw187 and inferior to the D.XXIII, but I believe it's more realistic to the time period.


Yes, right before I stopped trying to play the game of 'keeping up' things were getting a bit much- and as I recall I deliberately shortchanged the engine power the D.XXIII was using, which limits the performance. Still, both the FW-187 series and D.XXIII cleared review and made official storylines, so they seemed relevant.

I will point out that while the D.XXIII is years earlier than the Do335, it's a scaled up version of a real Fokker and I was working on it since the early 1930s, originally under the +5 rule. Then there was Foxy's version... :) Still, with better engines...

Heh. I'd not really ever paid any attention to Dutch developments and so presumed the D.XXIII was the historical one with the twin 550hp engines. Your comment had me searching back through old posts to find it, whereupon I made this face: 8o

The Fw187 comes from Planebuilder, which I hold in very low regard. So when it comes to the specs, I consider the source, and consider the capabilities inflated appropriately. But that's water under the bridge now.

Quoted

Originally posted by Kaiser Kirk
The Hanriot H.310 also beats a plane I forgot about- my own G-1 series. The G-1C gets beat by it. Which is as it should be. The G-1C's next version would have been evolved to be more P-38ish.

I don't think I've ever seen the G-1C. Bulgaria bought G-1Bs so I'm familiar with those, though.

Quoted

Originally posted by Kaiser Kirk
Engines : While the French used- and made better versions of Hispano-Suiza....in OTL....here relations between France and Iberia only improved recently. So it could be the historic engine, or you could rebrand. :)

Excuse me, but why should I "rebrand"? What's that to do with anything? ?(

Kaiser Kirk

Lightbringer and former European Imperialist

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24

Wednesday, April 20th 2011, 8:59am

Yeah, I have a feeling many paid little attention to Dutch developments and even less to my Belgian efforts. Noted someone was using the D.XXI and mentioned the fixed landing gear- something I deleted in the wesworld version.

The funny thing is even after I derated the rear engine and added more surface areas for radiators, planebuilder liked that configuration a great deal, you can really rev it up. I think I had a 12Z version set up for the 'future'.

Frankly I confuse myself on the G-1 subtypes sometimes. The G-1A was the historic aircraft with little/no wood and +2 engines. The -1B or C was the 'heavy fighter' version, with a revamped, narrower central nacelle and in-line engines for a lower cross-section and overall weight. Those should actually be the encyclopedia. Overall the airframe works well except the lowish wingloading slows them down compared to planes like the FW and other 'leading' planes.

On the engine- up to you. Until fairly recently Iberia wasn't particularly friendly towards France, so relying on an Iberian company for engines seems odd to me. That's all. No reason that during the non-friendliness the French couldn't have fostered their own domestic in-line engine company.

This post has been edited 1 times, last edit by "Kaiser Kirk" (Apr 20th 2011, 9:00am)


25

Wednesday, April 20th 2011, 3:41pm

Quoted

Originally posted by Kaiser Kirk
Yeah, I have a feeling many paid little attention to Dutch developments and even less to my Belgian efforts. Noted someone was using the D.XXI and mentioned the fixed landing gear- something I deleted in the wesworld version.

AFAIK, the Lithuanian Air Force was going to use the D.XXI, but I'm not recalling anyone else who bought them.

Quoted

Originally posted by Kaiser Kirk
On the engine- up to you. Until fairly recently Iberia wasn't particularly friendly towards France, so relying on an Iberian company for engines seems odd to me. That's all. No reason that during the non-friendliness the French couldn't have fostered their own domestic in-line engine company.

Other French companies designed inlines as well - such as SCEMM, Renault, Regnier, Lorraine, and then Gnome-Rhone's abortive attempts to design an inline - but the 12Y and 12Z are superior choices and available in higher horsepower and greater quantities both for French use and export. (The previous-listed firms, with the exception of Gnome-Rhone, were rather short on production space, while Hispano-Suiza was not.) And of course there's the HS-24H in development for 1943, using the 12Z cylinders for 2,500 horse.

26

Friday, April 22nd 2011, 4:35pm

Though the Hanriot I proposed is competitive to the region I've still got a feeling that it's pushing the line too much. So I went back and re-evaluated things and posited a faster, night-fighter variant of the Bloch MB.170 series. The specs for the MB.174 are here.

Quoted

[SIZE=4]Bloch MB.178-CN[/SIZE]
[SIZE=1]MB.178 was a historical but never-completed aircraft with more powerful GR-14N radials. These specifications are based on previous versions but represent a fictional development of a night-fighter.[/SIZE]

[SIZE=3]General characteristics[/SIZE]
Crew: Two (pilot, navigator/TD operator)
Length: 12.25 m (40 ft 2 in)
Wingspan: 17.90 m (58 ft 9 in)
Height: 3.55 m (11 ft 8 in)
Wing area: 38 m² (409 ft²)
Empty weight: 5,700 kg (12,566 lb)
Max takeoff weight: 7,275 kg (16,039 lb)
Powerplant: 2× Gnome-Rhône 14N-20/21 14-cylinder radial engines, 1,103 kW (1,479.5 hp / 1,500cv) each

[SIZE=3]Performance[/SIZE]
Maximum speed: 580 km/h (313 kn, 360 mph)
Range: 1,800 km (972 nmi, 1118 mi)
Service ceiling: 11,000 m (36,090 ft)
Rate of climb: 14 m/s (2,760 ft/min)

[SIZE=3]Armament[/SIZE]
- 2 × fixed, forward-firing 7.5 mm (.295 in) MAC 1934 machine guns in the wings
- 2 × 20 mm HS.404 cannons in upward-firing mount

[SIZE=3]Development Timeline[/SIZE]
- First Flight: Late 1939
- In Production: September 1940
- In Service: February 1941

27

Wednesday, May 4th 2011, 10:49pm

Proposed

Proposed 1941 follow-on to the VG.39bis (uses the VG.60 label but is not the historical VG.60). Opinions, please?

[SIZE=4]Arsenal VG.60 Revenant ("Ghost") fighter[/SIZE]
[SIZE=3]Specifications[/SIZE]
Wingspan: 10.7 m (35.1 feet)
Length: 8.86 m (29 feet)
Height: 3.14 m (10.3 feet)
Wing Area: 18.8 m² (202.36 ft²)
Empty weight: 2445 kg (5,390 lbs)
Loaded Weight: 3274 kg (7,218 lbs)
Engine: 1 × Hispano-Suiza 12Z (1,650 hp takeoff)
Crew: 1 (pilot)

[SIZE=3]Performance[/SIZE]
Max speed: 668 kph (415 mph)
Range: 994.5 km (618 miles)
Service ceiling: 11,650 m (38,221 ft)
Power to weight ratio: 0.228 hp/lb
Wingloading: 174 kg/m² / 35.7 lb/ft²
Rate of climb: 18.5 mps (1,115 fpm)

[SIZE=3]Armament[/SIZE]
- 2 × 20 mm HS.404 cannon in wings with 231 rounds each
- 1 × 20 mm HS.404 cannon in motorcannon mount or 2 × 7.5mm MGs in cowling

28

Wednesday, May 4th 2011, 11:01pm

RE: Proposed

Quoted

Originally posted by Brockpaine
Proposed 1941 follow-on to the VG.39bis (uses the VG.60 label but is not the historical VG.60). Opinions, please?

[SIZE=4]Arsenal VG.60 Revenant ("Ghost") fighter[/SIZE]
[SIZE=3]Specifications[/SIZE]
Wingspan: 10.7 m (35.1 feet)
Length: 8.86 m (29 feet)
Height: 3.14 m (10.3 feet)
Wing Area: 18.8 m² (202.36 ft²)
Empty weight: 2445 kg (5,390 lbs)
Loaded Weight: 3274 kg (7,218 lbs)
Engine: 1 × Hispano-Suiza 12Z (1,650 hp takeoff)
Crew: 1 (pilot)

[SIZE=3]Performance[/SIZE]
Max speed: 668 kph (415 mph)
Range: 994.5 km (618 miles)
Service ceiling: 11,650 m (38,221 ft)
Power to weight ratio: 0.228 hp/lb
Wingloading: 174 kg/m² / 35.7 lb/ft²
Rate of climb: 18.5 mps (1,115 fpm)

[SIZE=3]Armament[/SIZE]
- 2 × 20 mm HS.404 cannon in wings with 231 rounds each
- 1 × 20 mm HS.404 cannon in motorcannon mount or 2 × 7.5mm MGs in cowling


Given the availability of the engine and turbocharging, I really don't see any issues with the design as proposed. The armament is, perhaps, lighter than I would personally like, but not too far out of line with other European designs in service or proposed.

29

Wednesday, May 4th 2011, 11:16pm

I could perhaps use 4x20mm HS404s, perhaps.

30

Wednesday, May 4th 2011, 11:20pm

Quoted

Originally posted by Brockpaine
I could perhaps use 4x20mm HS404s, perhaps.


I suppose it depends on the manner in which you expect to employ the aircraft. For tackling a fighter, the armament you propose would probably suffice. For tackling a heavy bomber, I'd prefer the four 20mm cannon - they'd give a higher probability of a kill. They'd also be better for in a close-support role.

31

Wednesday, May 4th 2011, 11:25pm

I might go for the 4x20mm then. I'm not sure I'd really see any point to the two 7.5mm MGs, so... might as well ditch them.

Edit for tweaks:

Quoted

[SIZE=4]Arsenal VG.60 Revenant ("Ghost") fighter[/SIZE]
[SIZE=3]Specifications[/SIZE]
Wingspan: 10.7 m (35.1 feet)
Length: 8.86 m (29 feet)
Height: 3.14 m (10.3 feet)
Wing Area: 18.8 m² (202.36 ft²)
Empty weight: 2445 kg (5,390 lbs)
Loaded Weight: 3274 kg (7,218 lbs)
Engine: 1 × Hispano-Suiza 12Z (1,650 hp takeoff)
Crew: 1 (pilot)

[SIZE=3]Performance[/SIZE]
Max speed: 668 kph (415 mph)
Range: 994.5 km (618 miles)
Service ceiling: 11,650 m (38,221 ft)
Power to weight ratio: 0.228 hp/lb
Wingloading: 174 kg/m² / 35.7 lb/ft²
Rate of climb: 18.5 mps (1,115 fpm)

[SIZE=3]Armament[/SIZE]
- 4 × 20 mm HS.404 cannon in wings with 231 rounds each

32

Thursday, May 5th 2011, 6:01pm

I'd think that 3x20mm is more than sufficient for most purposes, especially with the centreline mounting and the HS404 being a fairly powerful 20mm weapon. The HS404 is rather heavy as well which might not be the best match for a small aircraft like the VG.60, especially with four in the wings. The engine mounting shouldn't need much additional strengthening.

What altitude is the maximum speed at?

33

Thursday, May 5th 2011, 6:04pm

Quoted

Originally posted by Red Admiral
I'd think that 3x20mm is more than sufficient for most purposes, especially with the centreline mounting and the HS404 being a fairly powerful 20mm weapon. The HS404 is rather heavy as well which might not be the best match for a small aircraft like the VG.60, especially with four in the wings. The engine mounting shouldn't need much additional strengthening.

I will take that into consideration, then.

Quoted

Originally posted by Red Admiral
What altitude is the maximum speed at?

7,000 meters.

34

Saturday, May 7th 2011, 7:45pm

Still fiddling with the armaments a bit. The 23mm motorkanon, based on the HS.404, was under development in 1940 when France fell; I've tentatively named it the HS.406.

Quoted

[SIZE=4]Arsenal VG.60 Revenant ("Ghost") fighter[/SIZE]
[SIZE=3]Design and Development[/SIZE]
The Arsenal VG.60 was a clean-sheet design started in early 1937 to provide a potential follow-on aircraft for the VG.30 and its variants. While the "Thirty Series" saw mass production up until 1941, with the VG.39bis serving as the ultimate variant, the design was often critiqued particularly in comparison to other aircraft on the international scene. Arsenal's designers drew on their experiences both with the failed VB.10 and the more successful VG.30. One of the main concerns, as a result of difficulties with Thirty-Series, was designing the VG.60 for ease of mass-production at the new Arsenal factory under construction at Châtillon-sous-Bagneux, which was designed to produce five hundred aircraft per year. While this emphasis on ease of production drove much of the VG.60's design, a conscious effort was made to reduce unnecessary weight through use of materials such as duralumin; and improve performance with additions such as the Meredith radiators, similar to those used on the VG.30 series. The final aircraft featured a bubble canopy (as installed on the final VG.39bis models) for high pilot visibility, with a protective sheet of armour and armoured glass behind the pilot's seat.

[SIZE=3]Specifications[/SIZE]
Wingspan: 10.7 m (35.1 feet)
Length: 8.86 m (29 feet)
Height: 3.14 m (10.3 feet)
Wing Area: 18.8 m² (202.36 ft²)
Empty weight: 2445 kg (5,390 lbs)
Loaded Weight: 3274 kg (7,218 lbs)
Engine: 1 × Hispano-Suiza 12Z (1,650 hp takeoff)
Crew: 1 (pilot)

[SIZE=3]Performance[/SIZE]
Max speed: 668 kph (415 mph) @ 7,000 meters
Range: 994.5 km (618 miles)
Service ceiling: 11,650 m (38,221 ft)
Power to weight ratio: 0.228 hp/lb
Wingloading: 174 kg/m² / 35.7 lb/ft²
Rate of climb: 18.5 mps (1,115 fpm)

[SIZE=3]Armament[/SIZE]
- 1 × 23 mm HS.406 motorcannon with 90 rounds
- 4 × 12.7mm Hotchkiss in wings with 300 rounds each or 2 × 20mm HS.404

[SIZE=3]Variants[/SIZE]
- VG.60: Initial production version armed with one HS.406 23mm cannon and four 12.7mm Hotchkiss machine guns.
- VG.61: Version produced concurrently to the VG.60, armed with three HS.404 20mm cannon; otherwise identical to the VG.60.

Kaiser Kirk

Lightbringer and former European Imperialist

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35

Saturday, May 7th 2011, 7:58pm

Some Dutch planes feature an FN modified 23mm Madsen, which has also adapted for motorcanon purposes. Makes sense the French would consider the same.

36

Saturday, May 7th 2011, 8:14pm

As France historically worked to develop it, I would say the same. The 23mm version, according to the guesstimates I've been able to find, has a slight ROF improvement over the HS.404, and the 23mm round itself masses about 160% that of the HS.404's 20mm round.

At the moment, I'm considering both the 3x20mm and the more recently-posted 1x23+4x12.7 versions, possibly with follow-on variants as time progresses. There's also the possibility for the Revenant to be tweaked to make a high-altitude interceptor version, though that role may fall to the trailing VB.20 with its significantly more powerful HS-24Z H-engine.

Edit: added variants and writeup to the above post.

37

Saturday, May 7th 2011, 9:33pm

Quoted

Originally posted by Brockpaine
As France historically worked to develop it, I would say the same. The 23mm version, according to the guesstimates I've been able to find, has a slight ROF improvement over the HS.404, and the 23mm round itself masses about 160% that of the HS.404's 20mm round.


From having a quick read in Chinn, it looks like the 23mm was basically the same as the 404 but with the 20x110 cartridge necked out to accept a 23mm shell.

38

Saturday, May 7th 2011, 11:48pm

According to my information, that's pretty close. The 23mm round also used a longer cartridge case (23x112 as opposed to 20x110), the gun was belt-fed instead of drum-fed, and the various improvements they introduced were supposed to boost rate of fire to 750rpm.

39

Sunday, May 8th 2011, 11:32am

One word sums up this fighter. Sweet.

Any pictures for us to gaze at? From the descriptons it looks a beauty.

40

Sunday, May 8th 2011, 2:58pm

Quoted

Originally posted by Brockpaine
According to my information, that's pretty close. The 23mm round also used a longer cartridge case (23x112 as opposed to 20x110), the gun was belt-fed instead of drum-fed, and the various improvements they introduced were supposed to boost rate of fire to 750rpm.


The history in Chinn is a bit convoluted as he's mostly talking about the adoption in the US. Essentially it seems that the initial 404 was the 20x110 with a drum feed and two sizes of barrels for fighter or bomber use. In 1938/39/40 work was moving in a few directions; a new 23mm that seems interchangeable, a belt feed, and increasing the rate of fire.

The UK adopted the original 404 and developed a belt feed mechanism from the French designs (though with a few UK alternatives as well like Martin-Baker's flat feed). They later shortened the barrel and implemented a similar rate of fire increase to get the Hispano Mk V. There was also an additional improvement in the Molins Hispano which raised rate of fire to 1000rpm, but this was not adopted.

Chinn gives some details on post-war designs as well. There seem to be a number of 20mm, 30mm and 37mm aircraft weapons but no additional detail on the 23mm.

The Isotta-Fraschini Scotti used by Italy is very similar to the Hispano-Suiza 404, Chinn implies that the HS404 was a near copy of the Italian weapon. Italy was going to follow a similar development path, but the standard round used is the more powerful 20x138. Belt feed was historically developed, and probably about time now for a Mk II to increase the rate of fire a bit.