|
|
09 July 2013, 20:18
|
#21
|
Member
Country: UK - England
Town: yeovil
Boat name: Lilly of lyme
Make: XS
Length: 4m +
Engine: 30hp Yamaha
Join Date: Jul 2011
Posts: 631
|
Quote:
Originally Posted by mister p
They were injected weren't they. Arguably a better machine than the Spit.......
|
certainly more advanced "While the conventional mechanical superchargers consisted of one or two compressors driven via a two-speed gear, Daimler-Benz utilised an ingenious barometrically controlled hydraulic clutch which adjusted the compressor speed and thus the charging of the engine according to the needs at a given altitude."
and
Taking into account the age of the Merlin design and its relative small displacement this two-stage inter- and after-cooled engine was a superb machine. In comparison with the German engines the Merlin was lighter due to the relative abundance of metals for making light alloys. When comparing outputs one should also bear in mind that the allies were well supplied with high grade fuels (100/130/150 octane). The Germans had to make do with 87, 92 or 96 octane, the higher grade fuels being especially scarce. ADI was used by both sides in the later stages of the war.
The Merlin 60 series were put into service in the late summer of 1942, around the same time that the DB 605A-1 went into service. The high altitude performance the Merlin 60 series was superior to the DB 605A-1. This superiority lasted into 1944 when the new AS and D sub-types went into service. These late sub-types equalled or bested the high altitude performance of the Merlins (Rolls-Royce and Packard) perhaps with the exception of the Mark 70. When GM-1 was used the picture changed thoroughly in favour of the DB 605.
The DB 605 basicallly gave good low altitude performance, especially at sea level (read the discussion of the supercharging systems). In this regard the DB 605A-1 was superior to the Mark 61, 63, 66 and 68 Merlins. The superiority of the late mark DB 605's at low and medium altitude was very pronounced when using MW-50 (AM, ASM), high octane and high boost (DB, ASB), high octane high boost
__________________
|
|
|
09 July 2013, 20:32
|
#22
|
Member
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
|
Now that deserves a beer!!!!!!!!! Only if it was from memory though.
Promise?
__________________
|
|
|
09 July 2013, 20:34
|
#23
|
Member
Country: UK - England
Town: yeovil
Boat name: Lilly of lyme
Make: XS
Length: 4m +
Engine: 30hp Yamaha
Join Date: Jul 2011
Posts: 631
|
Quote:
Originally Posted by mister p
Now that deserves a beer!!!!!!!!! Only if it was from memory though.
Promise?
|
pinkey promise.......................................not!
i'm having a beer any way! cheers
__________________
|
|
|
09 July 2013, 20:35
|
#24
|
Member
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
|
There's a classic working warbird museum in west Cornwall I've heard. Must go. Can't remember where it is though.
__________________
|
|
|
09 July 2013, 20:38
|
#25
|
Member
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
|
Quote:
Originally Posted by IanH
Fantastic news that a mosquito is back in the sky. IMHO, one of the most beautifully proportioned planes ever designed.
|
Absolutely correct........they are simply stunning and as you say, as far as proportions go, can't fault it.
__________________
|
|
|
09 July 2013, 20:39
|
#26
|
Member
Country: UK - England
Town: yeovil
Boat name: Lilly of lyme
Make: XS
Length: 4m +
Engine: 30hp Yamaha
Join Date: Jul 2011
Posts: 631
|
Quote:
Originally Posted by mister p
There's a classic working warbird museum in west Cornwall I've heard. Must go. Can't remember where it is though.
|
The Classic Airforce Collection this one?
__________________
|
|
|
09 July 2013, 20:45
|
#27
|
Member
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
|
Yes, not far from our Fowey base......just never have followed it up. Once we get to Fowey, the driving's over usually. Will have to go those few extra miles this weekend.
And re proportions..........the Mosquito has a lot of competition.
__________________
|
|
|
09 July 2013, 20:55
|
#28
|
Member
Country: Ireland
Make: Zodiac Mk I
Length: 3m +
Engine: 15 hp Yam two stroke
Join Date: Feb 2012
Posts: 728
|
Greatest plane there ever was, SR 71-Blackbird
__________________
|
|
|
09 July 2013, 20:59
|
#29
|
Member
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
|
Don't think anybody has ever seen one flying.
__________________
|
|
|
09 July 2013, 21:06
|
#30
|
Member
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
|
Has anybody touched a nuclear sub?
__________________
|
|
|
09 July 2013, 21:39
|
#31
|
Member
Country: UK - England
Town: Littlehampton, W Sx
Length: no boat
MMSI: 235101591
Join Date: Jan 2012
Posts: 732
|
When I was at university we had a guest lecturer who was quite elderly and had seen life at Rolls Royce from Merlins to the RB211 and beyond. A 'proper' engineer with a cardigan, a pipe and glasses with thick black frames, on more than one occasion He said that that when they were sent the drawings for the Merlin, Packard replied that that they couldn't make an engine like that. Puffed up at their superior engineering, RR asked why not. The reply from Packard was that the tolerances were far too large and they would have to re-tool!
In 1990 I was privileged to be given a tour of this beast. 'Cool' but somewhat agricultural, I remember it most for the milk-bottle crates full of Vodka bottles to see the crew through a week in Farnborough!
__________________
"Can ye model it? For if ye can, ye understand it, and if ye canna, ye dinna!" - Lord kelvin
|
|
|
09 July 2013, 21:43
|
#32
|
Member
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
|
Quote:
Originally Posted by mister p
Don't think anybody has ever seen one flying.
|
SR-71? Saw one do a flyby at the Beale AFB airshow about 20 years ago.
jky
__________________
|
|
|
09 July 2013, 21:43
|
#33
|
Member
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
|
Week? You mean morning.
Cool plane though, anything that does what it does is fantastic..........bring on the Hercules. Still buzzing Swindon with little "ants with mushrooms" falling out.......leaving a plume of exhaust only a vulcan could better.
__________________
|
|
|
09 July 2013, 21:44
|
#34
|
Member
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
|
Quote:
Originally Posted by jyasaki
SR-71? Saw one do a flyby at the Beale AFB airshow about 20 years ago.
jky
|
Couldn't have.
__________________
|
|
|
09 July 2013, 21:50
|
#35
|
Member
Country: UK - England
Town: Littlehampton, W Sx
Length: no boat
MMSI: 235101591
Join Date: Jan 2012
Posts: 732
|
Quote:
Originally Posted by mister p
Couldn't have.
|
Better than the B-2 'Spirit' that flew all the way across the Atlantic and back for a display at Farnborough airshow - except they performed the display over Blackbushe Aerodrome a few miles away, to the bemusement of several thousand spectators at Farnborough....
All they had to do was follow the M3!
__________________
"Can ye model it? For if ye can, ye understand it, and if ye canna, ye dinna!" - Lord kelvin
|
|
|
09 July 2013, 21:52
|
#36
|
Member
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
|
Or maybe they did but were "cloaked"?
__________________
|
|
|
09 July 2013, 21:56
|
#37
|
Member
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
|
Quote:
Originally Posted by mister p
Couldn't have.
|
Why is that, mister_p?
I certainly remember sitting in the hundred degree heat waiting for it to go by.
jky
__________________
|
|
|
09 July 2013, 21:59
|
#38
|
Member
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
|
Quote:
Originally Posted by jyasaki
Why is that, mister_p?
I certainly remember sitting in the hundred degree heat waiting for it to go by.
jky
|
Are you sure it was "it"?
There's a lot that goes on with this stealth business..........a hologram maybe.
But now that you mention the 100 degree heat.............
__________________
|
|
|
09 July 2013, 22:01
|
#39
|
Member
Country: UK - England
Town: Sidmouth
Boat name: Various
Make: Avon, Ribcraft
Length: 4m +
Engine: Mercury 40, Honda 50
Join Date: Nov 2012
Posts: 266
|
Stealth features on an SR-71?
__________________
|
|
|
09 July 2013, 22:12
|
#40
|
Member
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
|
Black paint.......can't see anything that's painted black. Right?
__________________
|
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|