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More compact the X-24/Vulture is not. The width of the Asso 750 was 1060 mm on the widest point, due to the stroke of 170 mm. Vulture was 910 mm, with small stroke - 140 mm? 3B Merlin would be closer to Vulture, not just because of modest stroke (152 mm), but because the outboard banks will be set 80 deg apart vs. Vulture's 90 deg. The lower end of the engine will be narrower than of X-24, since there is only crankcase present there, not 2 additional banks of cylinders. The Vulture was higher than Asso 750, despite having 30 mm less stroke, again because of 2 banks under crankcase. The 3B Merlin should save further 20 mm in height.
No, no.
The H-16 was for the 3 litre formula in the mid 1960s, and was a dismal failure (replaced by a V-12).
The 1.5l engine was a V-16 and had air supplied by a Rolls-Royce designed 2 stage centrifugal supercharger - yes, it was a min Merlin supercharger. That is teh engine that you hear al over youtube.
Got my Vs and Hs mixed up. The sound of the V16 warming up turn the speakers up loud
View: https://www.youtube.com/watch?v=anVAkHP4BgQ
Dont you just love the sound of internal combustion
More compact the X-24/Vulture is not. The width of the Asso 750 was 1060 mm on the widest point, due to the stroke of 170 mm. Vulture was 910 mm, with small stroke - 140 mm? 3B Merlin would be closer to Vulture, not just because of modest stroke (152 mm), but because the outboard banks will be set 80 deg apart vs. Vulture's 90 deg. The lower end of the engine will be narrower than of X-24, since there is only crankcase present there, not 2 additional banks of cylinders. The Vulture was higher than Asso 750, despite having 30 mm less stroke, again because of 2 banks under crankcase. The 3B Merlin should save further 20 mm in height.
The Vulture's dimensions were:
(From RRHT)
Width overall: 35.8in/909.32mm
Height overall: 42.175in/1071.245
The Lion II's dimensions were:
(from Napier Lion Aircraft Engine Pictures, Information and Specifications)
Width: 42.0in/1067mm
Height: 43.5in/1105mm
If you want sheer gut twisting noise the Honda 125 5 cylinder RC146 I have heard this warm up and it genuinely makes you feel ill.
It does have an extra bank of cylinders, that would amount to 20-25% more parts?
More compact the X-24/Vulture is not. The width of the Asso 750 was 1060 mm on the widest point, due to the stroke of 170 mm. Vulture was 910 mm, with small stroke - 140 mm? 3B Merlin would be closer to Vulture, not just because of modest stroke (152 mm), but because the outboard banks will be set 80 deg apart vs. Vulture's 90 deg.
continued: They also have Centaurus ready, the Griffon will soon produce 2500 HP etc. What I'm after is a 1700-1800 HP engine for early war, 2000 HP mid-war, up to 2500 HP for late war, that would use some existing engine parts, hence cutting on risk time to develop.
Pennine - 37.5in/952.5mm x 39in/990.6mm - 106in/2692mm long.
The length of the con-rods compared to the stroke are also important, and if the ratio is too low the rpm ability of the engine is restriicted.
The Merlin XX is already taller than the Vulture.
Sticking a vertical cylinder bank up the middle will only make it more so.
How/why do you get 80° for the outer banks? Have you laid out the cylinder banks graphically to see if they can still mount the same distance from the crank centreline?
The Lion, a broad arrow or W type engine, was wider and taller than the Vulture, despite having smaller cylinders than the Vulture.
Now IF you built a 18 cylinder Y engine with 120 degrees between each bank figuring out a firing order and piston movement would be a lot easier although it would be one wacking BIG engine