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1
User Artwork / Re: Covert Shores sub cutaways and profiles
« Last post by covert_shores on Yesterday at 03:03:06 pm »
Big sub-compare illustration using profiles from the new book. If resolution of attachment appears too low then go to http://www.hisutton.com/SSNs.html for original

2
Interesting, looking more feasible. Are the internal pressure hulls now circular in cross-section?
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Designation Systems / Re: SECM/Amiot Designations
« Last post by hesham on Yesterday at 04:30:12 am »
Hi,

for SECM and its products,sometimes they called it "XXVI" and anther way they
called it "26",no specific system.
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Designation Systems / Re: SECM/Amiot Designations
« Last post by Maveric on Yesterday at 01:08:41 am »
Fιlix Amiot, Sociιtι d'Emboutissage et de Constructions Mιcaniques (SECM), and Avions Amiot

Amiot Projects: https://www.secretprojects.co.uk/forum/index.php/topic,15820.0/all.html

Fιlix Amiot Aircraft Designations

Amiot 01 - 1912 2-seat monoplane built at Issy-les-Moulineaux
 - Amiot 01: Crashed by Fιlix Amiot in 1913 accident
 -- https://www.secretprojects.co.uk/forum/index.php/topic,15820.msg210729.html#msg210729

Amiot 02 - (??) hypothetical designation

___________________


SECM (Sociιtι d'Emboutissage et de Constructions Mιcaniques)

SECM XIII - (??) No details, Mentioned by Hesham
 - SECM XIII: aka Amiot 13

SECM XIV - (??) No details, Mentioned by Hesham
 - SECM XIV : aka Amiot 14

SECM XV-SECM XIX - (??) hypothetical designations

SECM XX -- 1920 Lutθce, metal* 2-seat biplane, x 1
 - SECM XX: 1 x 110 hp Le Rhτne 9J rotary, span 9.50 m
 -- * Fabric-covered stamped-Duralumin struc., aka SECM 20

SECM XXI -- (Project) 1921 biplane, Farman engine, x 1
 - SECM XXI: Built but never flown (engine not delivered)
 -- aka SECM 21

SECM XXII - 1922 side-by-side 2-seat advanced trainer/tourer
 - SECM XXII: Dual controls, 1 x 150 hp Hispano-Suiza HS 8A, x 3
 -- 1 x 150 hp Hispano-Suiza 8A, span 11.20 m, aka SECM 22/Amiot 22
 -- http://aviadejavu.ru/Images6/FT/FT1923/02/61-3.jpg
 -- https://www.secretprojects.co.uk/forum/index.php/topic,15820.msg189512.html#msg189512

SECM XXIII - 1923 3-seat* biplane, 1 x 180 hp HS 8Ac, x 1
 - SECM XXIII: Enlarged SECM 22, aerial photography/transport
 -- * Pilot bet. wings, 2 x pax side-by-side behind the wings
 -- Span 11.20 m; aka SECM 23, aka Amiot Type 23
 -- http://aviadejavu.ru/Images6/FT/FT1922/12/764-6.jpg
 -- https://www.secretprojects.co.uk/forum/index.php/topic,15820.msg189513.html#msg189513

SECM XXIV -- 1923 2-seat* biplane, 1 x 80 hp Le Rhτne 9C, x 1
 - SECM XXIV: Rotary-powered flying school deriv. of SECM 22
 -- * Aviafrance says single-seat, aka SECM 24, aka Amiot 24

SECM XXV -- (Project) Radial-engined deriv. of SECM 24 model
 - SECM XXV: aka SECM 25, (poss.) aka Amiot 25 light transport

SECM XXVI -- 1923 2-seat biplane, 1 x 80 hp Le Rhτne 9C, x 1
 - SECM XXVI: For 1923 competition for dual-control school a/c*
 -- 1923 competition won by Morane-Saulnier 35 and Hanriot HD 14
 -- aka SECM 26, aka Amiot Type 26


I΄m a little bit confused :-[

SECM XII aka Amiot 120 and so on,
but we have also:
SECM XXVI as earlyer designation aka SECM 26 aka Amiot Type 26?????

_____________________________________
5
User Artwork / Re: Arsenal VG.20 (1/72 scratchbuilt model by CAO 700)
« Last post by Deltafan on November 18, 2017, 08:41:35 pm »
Hi! Twin engines?

https://www.hydroretro.net/etudegh/arsenal_de_l_aeronautique.pdf
Yes, they were all (VB-10, VG-20 and VG-10) foreseen as engines in tandem planes (as the Kawasaki Ki-64).

The flying testbed, destroyed in Lyon-Bron on 30/04/1944 by allied bombers, was a modified one-engine Latιcoθre 299, the Latιcoθre 299A (its two engines were closer together and before the pilot). It flew three times before to be destroyed. 4 photos and 2 drawings on this Russian links : http://www.airwar.ru/enc/spyww2/late299.html
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Designation Systems / Re: SECM/Amiot Designations
« Last post by Apophenia on November 18, 2017, 03:55:48 pm »
Thanks Hesham. The 'Amiot 364' was also described by William Green in Warplanes of the Second World War: Bombers and Reconnaissance Aircraft (Volume 7), Macdonald, 1967.
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Propulsion / Re: What-if Engines
« Last post by Nick Sumner on November 18, 2017, 12:41:58 am »
Some of these were actually planned in real life, The RR Vulture had smaller cylinders than the Merlin but the same spacing between cylinders suggesting that it would be possible to use Merlin blocks. The RR H24 using Merlin cylinders was definitely planned, there is a model at the Derby museum. I'm pretty sure Napier planed a 32 cylinder Sabre as well.
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Propulsion / What-if Engines
« Last post by simmie on November 17, 2017, 06:17:25 pm »
Over the summer I found myself with some spare time and an over active imagination.  So I came up with a few what-if engines, some of the dimensions might be a little off as I haven't used trig for about 25 years since college.

X-24 Merlin
•   Type: X-24 supercharged liquid-cooled piston engine
•   Bore: 5.4 inches
•   (137 mm)
•   Stroke: 6.0 inches
•   (152 mm)
•   Displacement:
•   3298 in³ (54 L)
•   Length 88.7 in
•   (2250 mm)
•   Width 43.43 in
•   (1103.09 mm)
•   Height 43.43 in
•   (1103.09 mm)

H-24 Merlin
•   Type: Liquid-cooled H24 engine
•   Bore: 5.4 in
•   (137 mm)
•   Stroke: 6.0 in
•   (152 mm)
•   Displacement:
•   3298 in³ (54 L)
•   Length: 88.7 in
•   (2250 mm)
•   Width: 43 in
•   (1092 mm)
•   Height: 61.42 in
•   (1560 mm)

W-18 Merlin
•   Type: W-18 water-cooled in-line engine
•   Bore: 5.4in
•   (137mm)
•   Stroke: 6.0 in
•   (152 mm)
•   Displacement:
•   2473 in3 ( 40.5 L)
•   Length 88.7 in
•   (2250 mm)
•   Width 53.19 in
•   (1350.99 mm)
•   Height 44.27 in
•   (1124.5 mm)

V-16 Merlin
•   Type: 16-cylinder, supercharged, liquid-cooled, 60° V, piston aircraft engine.
•   Bore: 5.4 in
•   (137 mm)
•   Stroke: 6.0 in
•   (152 mm)
•   Displacement:
•   2198.67 in3 ( 36 L)
•   Length: 101.096 in
•   (2567.84 mm)
•   Width: 30.8 in
•   (780 mm)
•   Height: 40 in
•   (1020 mm)

 
De Havilland Gipsy Eighteen
•   Type: Inverted W-18 inline piston engine
•   Bore: 4.646 in (118 mm)
•   Stroke: 5.512 in (140 mm)
•   Displacement:
•   1689.95 in3 (27.45 L)
•   Length: 82.6 in (2,098 mm)
•   Width: 54.55 in (1385.64 mm)
•   Height:  33.5 in (838 mm)

De Havilland Gipsy Twenty Four
•   Type: 90 degree X-24 inline piston engine
•   Bore: 4.646 in (118 mm)
•   Stroke: 5.512 in (140 mm)
•   Displacement:
•   2242.6 in3 (36.6 L)
•   Length: 82.6 in (2,098 mm)
•   Width: 44.54 in ( 1131.37 mm)
•   Height: 44.54 in ( 1131.37 mm)

De Havilland Gipsy Sixteen (inspired by Apophenia)
•   Type: Inverted 60 degree V-16 inline piston engine
•   Bore: 4.646 in (118 mm)
•   Stroke: 5.512 in (140 mm)
•   Displacement: 1495.067 in3
•   (24.4 L)
•   Length: 95.78 in ( 2432.69 mm)
•   Width: 31.5 in (800 mm)
•   Height: 37.4 in ( 950 mm)


De Havilland Gipsy Eight
•   Type: Inverted 90 degree V-8 inline piston engine
•   Bore: 4.646 in (118 mm)
•   Stroke: 5.512 in (140 mm)
•   Displacement: 747.53 in3
•   (12.248 L)
•   Length: 69.42 in (1763.31 mm)
•   Width: 44.54 in ( 1131.37 mm)
•   Height: 32.987 in ( 837.87 mm)

De Havilland Gipsy W Twelve
•   Type: Inverted W-12 inline piston engine
•   Bore: 4.646 in (118 mm)
•   Stroke: 5.512 in (140 mm)
•   Displacement:
•   1121.3 in3 (18.3 L)
•   Length: 69.42 in (1763.31 mm)
•   Width: 54.55 in (1385.64 mm)
•   Height: 33.5 in ( 838 mm)

Irbitis MI-02
•   Type: 36-cylinder air-cooled multi-bank piston aircraft engine
•   Bore: 4.646 in (118 mm)
•   Stroke: 5.512 in (140 mm)
•   Displacement:
•   3363.9 in³ (54.9 L)
•   Length: 82.6 in (2098 mm)
•   Width: 47.244 in (1200 mm)
•   Height: 43.307 in (1100 mm)

Napier Super Lion
•   Type: 24-cylinder water-cooled W-block (3 banks of 8 cylinders) aircraft piston engine
•   Bore: 5.5 in (139.7 mm)
•   Stroke: 5.125 in (130.17 mm)
•   Displacement: 2923.2 in³ ( 47.888 L)
•   Length: 85.05 in (2160.33 mm)
•   Width: 42.0 in (1067 mm)
•   Height: 43.5 in (1105 mm)

Napier Sabre H-32
•   Type: 32-cylinder supercharged liquid-cooled H-type aircraft piston engine
•   Bore: 5.0 in (127 mm)
•   Stroke: 4.75 in (121 mm)
•   Displacement: 2,986.67 in³ (48.867 L)
•   Length: 92.25 in (2,343 mm)
•   Width: 40 in (1,016 mm)
•   Height:46 in (1,168 mm)

Bristol Hercules ‘Major’
•   Type: 21-cylinder, three-row, supercharged, air-cooled radial engine
•   Bore: 5.75 in (146mm)
•   Stroke: 6.5 in (165mm)
•   Displacement: 3540 in³
•   (58.05 L)
•   Length: 60.9 in
•   ( 1547 mm)
•   Diameter: 55 in (1,397mm)

Bristol Hercules ‘Super Major’
•   Type: 28-cylinder, four-row, supercharged, air-cooled radial engine
•   Bore: 5.75 in (146mm)
•   Stroke: 6.5 in (165mm)
•   Displacement: 4720 in³
•   (77.4 L)
•   Length: 68.65 in
•   ( 1744 mm)
•   Diameter: 55 in (1,397mm)
10
User Artwork / Re: Daniel Uhr artwork
« Last post by Geist on November 17, 2017, 09:07:54 am »
Thanks, Daniel,
One more question:
What size and resolution do you start drawing?

Usually with width = 56cm (height proportional) or a little bigger with 300dpi in RGB mode.
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