more bike porn

[Justgrazing]

Couple of W650 Kawa's .. 

Bottom bike looks good in that colour scheme .. 

Cool old 750 Honda with a front drummer .. 

 

 

[Justgrazing]

Another Allison .. The leviathan 75 ltr X4520 X24 cyl .. 4 banks of 6 mounted on a barrel crankcase holding a 7 roller main bearing crank with flats machined on the barrel to achieve the X formation .. Centrifugal supercharger drawing thru' the carbs beneath the big U pipe ( as opposed to later convention that had the carbs pressurised ) .. Dev'd in the 20's with a view to being put in a commercial transport aircraft it never went any further than prototype stage after failing quite dismally to provide the hoped for power output .. instead of 1800/1900 hp it struggled to churn out much more than 1400 on the test bed .. 

 

[MartinL]

Napier Deltic opposed piston 2-stroke diesel engine. Found mostly on diesel locomotives with some marine use, although they were originally designed as marine engines.

 

 

Banks of 3 cylinders, each cylinder containing 2 pistons, arranged in a triangular (= Greek delta) configuration. Supercharged. Multiple banks of cylinders could be combined to give 6, 9, 18 etc. cylinders. Uniflow scavenging which means that, unlike bike 2-stroke engines, the flow of inlet mixture and exhaust gases are in one direction only, not crossflow or loop scavenging. Inlet ports are at one end of the cylinder liner, exhaust ports at the other end. 2 of the 3 crankshafts rotated in one direction, the third rotated in the opposite direction. The 3 crankshafts were eventually all geared to a common output shaft. 

 

Animation of the operation of a single bank of cylinders. 

 

 

I never saw one on any of the ships I worked on but I had a mate who was a diesel fitter on British Rail and he showed me around the one once. Very interesting.

 

Big Doxford marine main propulsion engines, from Sunderland, were similar to a single cylinder of the Deltic engine, operating a single crankshaft with 3 crank throws per cylinder, one throw (centre in the diagram) connected to the main power piston and the other two (much smaller stroke) to the 'top' piston which was more of an exhaust valve, really.

 

[papa al]

7 hours ago, Justgrazing said:

Another Allison .. The leviathan 75 ltr X4520 X24 cyl .. 4 banks of 6 mounted on a barrel crankcase holding a 7 roller main bearing crank with flats machined on the barrel to achieve the X formation .. Centrifugal supercharger drawing thru' the carbs beneath the big U pipe ( as opposed to later convention that had the carbs pressurised ) .. Dev'd in the 20's with a view to being put in a commercial transport aircraft it never went any further than prototype stage after failing quite dismally to provide the hoped for power output .. instead of 1800/1900 hp it struggled to churn out much more than 1400 on the test bed .. 

 

What a beast !!

The Voight Corsair F4U

[like daddy flew off the flat-tops]

made 2000 HP.

Japs called it

Whistling Death.

[thaiguzzi]

[VocalNeal]

17 hours ago, MartinL said:

Big Doxford marine main propulsion engines, from Sunderland, were similar to a single cylinder of the Deltic engine, operating a single crankshaft with 3 crank throws per cylinder, one throw (centre in the diagram) connected to the main power piston and the other two (much smaller stroke) to the 'top' piston which was more of an exhaust valve, really.

 

Been inside the cylinder grinding off the "lip" so that the bottom piston can be lifted out. Been inside the crankcase doing a hammer test, slipped and slid down in the bottom of the crankcase. All covered in oli ???? 

 

Missing from the diagram is the scavenge cylinder(s) which pressurizes the the scavenge space so that when the inlet ports open the air is forced in not sucked in. Five cylinder engines had two.

 

Twin screw ship had two engines.

 

here ya go.

 

Our control levers were on the end not the side of the engines.

[MartinL]

19 minutes ago, VocalNeal said:

Been inside the cylinder grinding off the "lip" so that the bottom piston can be lifted out. Been inside the crankcase doing a hammer test, slipped and slid down in the bottom of the crankcase. All covered in oli ???? 

 

Missing from the diagram is the scavenge cylinder(s) which pressurizes the the scavenge space so that when the inlet ports open the air is forced in not sucked in. Five cylinder engines had two.

 

Twin screw ship had two engines.

 

here ya go.

 

Our control levers were on the end not the side of the engines.

Happy Days, eh? Crankcase tests - VERY hot especially if the engine hadn't long been stopped, sweaty, oily and quite dangerous, looking back on it but just one of those necessary tasks in pre-H&S days. Being inside the crankcase while someone turned the engine for deflections could be quite hairy too. Maybe we shouldn't have been in there but everybody did it ... 

 

I had real trouble finding a half-decent diagram of a Doxford engine. The two of these together give a good picture of the engine. 

 

Unfortunately (or should that be fortunately, given the things I heard about Doxfords) the only working Doxford engine I ever saw was the single-cylinder one at South Shields Tech.

[ballpoint]

BMW K75 Alpha salt flats racer

 

 

[ballpoint]

Another custom Beemer, the R80RT White Phantom

 

Whatever you may think of the rest of the bike, gotta love them brass gauges:

[Justgrazing]

17 hours ago, papa al said:

What a beast !!

The Voight Corsair F4U

[like daddy flew off the flat-tops]

made 2000 HP.

Japs called it

Whistling Death.

Vought F4 Corsair .. distinctive inverted gull shaped folding wings it was one of the principal fighters of the U S carrier fleet in the Pacific and feared by the Japanese Airforce probably more than any other U S fighter .. 

Armed to the teeth with .50 cals , auto cannon's , rockets and bombs it was also fast and quite nimble in aerial combat outperforming the Zero in all but some slow speed manoeuvres .. and importantly for a carrier based plane was tough as old boots .. First U S single engined fighter to exceed 400 mph finishing up near 450 courtesy of a Pratt & Whitney Wasp 18 pot double row radial rated at 2400 hp .. Considerably smaller and lighter than other 18 banger radials available one of the challenges was cooling particularly the rear cyls and fins achieved by casting of the heads were not fine enough for the job .. so the fins were machined into the head casting , the frequency , depth and direction of the milling machines following the fin profile of master copies .. I ain't getting deep on this but any of ye'z who understand a bit about machining and profile machining in particular will get how advanced that was for the time .. especially when you look how intricate and closely spaced the fins are on the head in pic' 3 .. And when you have 18 heads for one engine it can be seen how American industrial power became so influential during that time .. 

F4 loosing off some direct fire rockets at Okinawa .. 

 

 

 

[Justgrazing]

30's BMW R7 streamliner and a recent take on it based around a R9 .. 

 

[canthai55]

9 hours ago, thaiguzzi said:

God those old Indians were Fugly - designed by BMW I guess

[VocalNeal]

5 hours ago, MartinL said:

pre-H&S days.

Dropping large nuts from the tops down next to guys on watch drinking tea. Got there attention.

Too many really, stranger things do happen at sea.

[ballpoint]

1 hour ago, canthai55 said:

God those old Indians were Fugly - designed by BMW I guess

She's neither old, nor an Indian.  

Oh, you meant the bike.

[papa al]

On 10/3/2019 at 12:38 AM, papa al said:

What a beast !!

The Voight Corsair F4U

[like daddy flew off the flat-tops]

made 2000 HP.

Japs called it

Whistling Death.

2 years prior dad rode 1-horse power on the farm.

Dad said he was so scared that he had diarrhoea most missions.

Not fun sitting in cockpit for hours in your own mess.

... & that red-head looks a lot like mom.

 

 

[thaiguzzi]

18 hours ago, canthai55 said:

God those old Indians were Fugly - designed by BMW I guess

Harley owners gotta hate...

[Justgrazing]

1930 Matchless Silverhawk .. 

Intended as a bit of a high end machine to rival Brough's it had a narrow ( very ) V4 with an all in one single cam cyl head .. not unlike Ariel's square 4 this suffered all manner of overheating problems from the rear pots .. insufficient cooling and unequal mixture distribution by the odd intake setup meant it didn't last long .. classic looking 30's bike though .. 

1935 Charter Lea patrolman in AA colours .. 

 

[Isaanbiker]

On 7/23/2018 at 11:18 AM, thaiguzzi said:

Bored & stroked 1000cc Trident engine Triton;

 

Alloy barrelled 810cc alloy tank, seat, side panels, front mudguard T140 we built in my shop in the late 90's. Mikuni's, Supertrapp 2:1, money no object customer bike.

There is no silver paint on the bike - that is all scotchbrite finished and lacquered natural alloy....

I've just seen a very nice Guzzi California at the Free Riders in Sisaket that needs a new clutch/ Great bike....

[thaiguzzi]

4 hours ago, Isaanbiker said:

I've just seen a very nice Guzzi California at the Free Riders in Sisaket that needs a new clutch/ Great bike....

Rare a clutch goes on a big twin.

I presume it has no plate and book?

If he wants to spend the money, i can order a clutch (postage will NOT Be cheap) and i can put a new clutch in.

About a full day's work, ie 8-10 hours.

But whilst i put the new clutch in, i will then find that the UJ support bearing is going, then the..... and then the...

 

 

 

[Damrongsak]

Since we're mixing aircraft in here, thought I'd add a pic of a Honda MM93 aircraft.  Flown by none other than Marc Márquez. (Shown here testing the ejection seat.)  Note the climb angle - impressive.

 

.

[Justgrazing]

Close enough to spit on .. 

The bottom shot you can see the fastener heads on the engine cowling and underside intake fixings .. 

 

[ballpoint]

19 hours ago, Damrongsak said:

Since we're mixing aircraft in here, thought I'd add a pic of a Honda MM93 aircraft.  Flown by none other than Marc Márquez. (Shown here testing the ejection seat.)  Note the climb angle - impressive.

 

.

He was wearing an Alpinestars airbag safety suit with a built in data logger, and they released the data from it yesterday:

 

"Data from Marc Marquez's frightening high-side crash in Thailand Grand Prix MotoGP practice reveals he hit the asphalt with a 26.14g impact and that the accident lasted 4.81 seconds".

 

https://www.autosport.com/motogp/news/146421/anatomy-of-marquez-26g-thailand-crash

 

Didn't seem to affect his race though.  I might have to get me one of those suits for my next flight.

 

[Justgrazing]

Africa Twin after a diet , a supermoto front end and a CBR1000 engine .. 

 

[Justgrazing]

Nice old 500/4 Honda .. check out the shape of the tank .. 

 

[ballpoint]

A nice custom T100 from Taiwan:

 

 

And, before the 'shape of the headlight' argument starts, it was chosen due to its resemblance to the Kanji character for 'eye' (目).  No jokes about riding a bike with a Jap's eye on the front please.

 

 

[ballpoint]

Three vastly different Bimotas:

 

The rather striking, and not giving a fork, tesi 3D raceface prototype.  Could have called it Racey McRaceface I suppose:

 

The super sexy DB5 Sebulba:

 

And, at the back of the line when looks were handed out, the DB3 Mantra:

 

Complete with faux walnut dash.  Just what you need to go with the carbon fibre:

[ballpoint]

On 10/3/2019 at 5:38 PM, Justgrazing said:

Vought F4 Corsair

[ballpoint]

One of the best ever paint schemes on a plane. Shark mouthed Curtis P-40 Warhawks, flown by the Flying Tigers over Burma and China during WW2:

 

 

 

 

[Justgrazing]

2 minutes ago, ballpoint said:

One of the best ever paint schemes on a plane. Shark mouthed Curtis P-40 Warhawks, flown by the Flying Tigers over Burma and China during WW2:

 

 

 

 

Awesome B P .. is that a drop tank beneath in pic' 2 .. 

 

[Justgrazing]

Messerschmitt BF109 or more commonly known as the ME109 by both the British and the Germans .. 

Luftwaffe's staple fighter debuted in the Spanish Civil War and has the highest kill rate of any WW2 plane along with the highest number of pilots with over 100 kills ( in part due to the turkey shoot of the Soviet airforce during the early part of the invasion of Russia ) legendary for its duelling in the Battle of Britain with the Spit's the merits of both was fairly even Steven but what handicapped the ME a bit was a lack of range that limited them to 30 mins max' over Southern ENG from their bases in France .. Not overly heavily armed like planes would become later in the war and not that fast to start off with it was continually developed and served in just about every campaign right up to the end but by then was outclassed by the allied planes ..