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On the Ramp Right Now!
Page 6 of 28
Page 6 of 28 • 1 ... 5, 6, 7 ... 17 ... 28
Re: On the Ramp Right Now!
Yeah, it's great place to work, and we get to deal with some cool stuff!
You never EVER go to the airport without a camera !
You never EVER go to the airport without a camera !
Kim- Top Poster
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Posts : 8509
Join date : 2011-09-06
Location : South East Missouri
Re: On the Ramp Right Now!
Thanks for the engine diagrams. The bottom one illustrates it with the most clarity. Lots more dependable than a chain and sprocket, and less trouble with lash and fatigue than would be with a simple edge to edge configuration(forgive me, I'm at a loss for the proper term).
Is that an odd firing order on that bottom engine?
Is that an odd firing order on that bottom engine?
_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Rest In Peace
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OVERLORD- Diamond Member
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Join date : 2013-03-19
Age : 57
Location : Normandy, France
Re: On the Ramp Right Now!
Some other engine ahve the same order 1-2-4-3, the Ford Pre-Xflow, Ford Xflow...
Nice pictures Lieven,
Nice pictures Lieven,
navion34- Gold Member
- Posts : 208
Join date : 2012-09-09
Age : 60
Location : France
Re: On the Ramp Right Now!
That's exactly what I mean. With that arrangement, as the gear teeth wear, the cumulative lash between the gears adds up fast causing slop in the valve timing. If that's in an aircraft engine I expect they might have to replace the gears pretty frequently as regular maintenance. With the shaft drive I would expect it to be more dependable. Or if the gear cover is easily accessible, a quick easy job.
Maybe 6 of 1,or 1/2 dozen of the other.(is that expression understood in French?)
_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Rest In Peace
- Posts : 10869
Join date : 2011-08-10
Age : 68
Location : South Carolina, USA
Re: On the Ramp Right Now!
I didn't understand the expression right away but the www helped me out. It is a beautiful arrangement indeed but I think the cascade of gears was less expensive to manufacture: a few straight cut gears only instead of a shaft, extra ball bearings and bevel gears to drive cam, magnétos + waterpump most of the time. The geardrive took less space in the engine block as well.
After the war, the use of inline engines became a lot less, I think, in commercial and military aircraft due to the upcoming jet engine and also due to the radial engine with lots of power.
The inline Renault Bengali and De Havilland Gipsy Major engines, both air cooled inverted inline engines in the style of the Ranger, had lateral camshafts. A Gipsy engine can be seen in the yellow Chipmunk on the previous page.
The radial engine's cam drive was also very straightforward:
In mass produced car engines, overhead cams were driven by chains as in the Jaguar XK. In 1966, Fiat was first in using a rubber toothed belt on the twin cam Lampredi engine of the Fiat 124 Spider.
More oddities exist though. The Bentley 6.5L and 8L engines had an overhead camshaft driven by 3 connecting rods mounted between a reduction on the crankshaft near the flywheel and the aft end of the cam. The conrods sort of pulled the cam around. When Bentley was bought by RR in 1931, W.O. Bentley left and moved to Lagonda where he designed in the late 30's the 4.5L V12 engine. This engine had 3 chains, I believe, to drive both overhead cams. I worked on a few of those engines. The day you start overhauling one, you wish you stayed in bed that morning.
Here is 1 more picture showing the level of engineering nearly 100 years ago: 1918 De Dion Bouton aero engine in W, 16 cyl, 4 banks with overhead cam and shaft drive. Have a look at the 4 magnetos with double ignition. What a pain to fix those spark plug leads!
Lieven
If I wrote some nonsense, Please correct me.
After the war, the use of inline engines became a lot less, I think, in commercial and military aircraft due to the upcoming jet engine and also due to the radial engine with lots of power.
The inline Renault Bengali and De Havilland Gipsy Major engines, both air cooled inverted inline engines in the style of the Ranger, had lateral camshafts. A Gipsy engine can be seen in the yellow Chipmunk on the previous page.
The radial engine's cam drive was also very straightforward:
In mass produced car engines, overhead cams were driven by chains as in the Jaguar XK. In 1966, Fiat was first in using a rubber toothed belt on the twin cam Lampredi engine of the Fiat 124 Spider.
More oddities exist though. The Bentley 6.5L and 8L engines had an overhead camshaft driven by 3 connecting rods mounted between a reduction on the crankshaft near the flywheel and the aft end of the cam. The conrods sort of pulled the cam around. When Bentley was bought by RR in 1931, W.O. Bentley left and moved to Lagonda where he designed in the late 30's the 4.5L V12 engine. This engine had 3 chains, I believe, to drive both overhead cams. I worked on a few of those engines. The day you start overhauling one, you wish you stayed in bed that morning.
Here is 1 more picture showing the level of engineering nearly 100 years ago: 1918 De Dion Bouton aero engine in W, 16 cyl, 4 banks with overhead cam and shaft drive. Have a look at the 4 magnetos with double ignition. What a pain to fix those spark plug leads!
Lieven
If I wrote some nonsense, Please correct me.
OVERLORD- Diamond Member
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Age : 57
Location : Normandy, France
Re: On the Ramp Right Now!
That's neat! I like seeing neat stuff show up at the airport. I'm glad that you think enough to put it here, for us! Thanks!
GUS THE I.A.- Gold Member
- Posts : 359
Join date : 2012-08-15
Location : Wichita, Kansas
Re: On the Ramp Right Now!
GUS THE I.A. wrote:That's neat! I like seeing neat stuff show up at the airport. I'm glad that you think enough to put it here, for us! Thanks!
You're welcome Gus !!!!!!!!!! Just sharing the fun!
Kim- Top Poster
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Posts : 8509
Join date : 2011-09-06
Location : South East Missouri
Re: On the Ramp Right Now!
Cool Kim!
We have altough a zeppelin stationated nearby, it has ,,Fuji Film'' letterings.
I am allways impressed when it is flying around here.
We have altough a zeppelin stationated nearby, it has ,,Fuji Film'' letterings.
I am allways impressed when it is flying around here.
coxaddicted- Gold Member
- Posts : 492
Join date : 2012-07-11
Age : 44
Location : North-Rhine Westphalia, Germany
Re: On the Ramp Right Now!
With respect to different cam drives, until recent years all Ducati motorcycle engines had shaft drive to their OHC. In fact the racing Dukes had triple overhead cams. If these things interest you, check out Duke's "desmodromic" valves. All of their engines are still desmo. Also, until recent years all MV Agusta motorcycles had the "gear tower" drive to their OHCs. Not in any way suggesting that these 2 were first, but just demonstrating that even now these things are not all that uncommon. I've owned quite a few Dukes over the years, and an MV Agusta too. Btw, the Kawasaki W800 (a current model) has shaft rive to the OHC.
dinsdale- Account Deactivated by Owner
- Posts : 317
Join date : 2012-02-22
Re: On the Ramp Right Now!
Wow, what a beauty! I wanna ride in that.
_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Rest In Peace
- Posts : 10869
Join date : 2011-08-10
Age : 68
Location : South Carolina, USA
Re: On the Ramp Right Now!
RknRusty wrote:Wow, what a beauty! I wanna ride in that.
Me too! Same engine as the PT-19...and 3/4 of the air-frame !!!!!!!!!!!!!!!
Kim- Top Poster
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Posts : 8509
Join date : 2011-09-06
Location : South East Missouri
Re: On the Ramp Right Now!
Oh my, now why doesn't cool stuff like that ever land on an AFB. What a beautiful machine!
Ron
P.S are they hiring any Navaids techs?
Ron
P.S are they hiring any Navaids techs?
Cribbs74- Moderator
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Location : Tuttle, OK
Re: On the Ramp Right Now!
cribbs74 wrote:Oh my, now why doesn't cool stuff like that ever land on an AFB. What a beautiful machine!
Ron
P.S are they hiring any Navaids techs?
Don't know...but I could give you the airport managers number....figure that's an FAA assignment thing though....
Kim- Top Poster
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Posts : 8509
Join date : 2011-09-06
Location : South East Missouri
Re: On the Ramp Right Now!
Kim wrote:cribbs74 wrote:Oh my, now why doesn't cool stuff like that ever land on an AFB. What a beautiful machine!
Ron
P.S are they hiring any Navaids techs?
Don't know...but I could give you the airport managers number....figure that's an FAA assignment thing though....
I work at the MMAC. So FAA contacts shouldn't be too hard.
I was being kind of tongue in cheek as I have 2 more years until I can retire.
Ron
Cribbs74- Moderator
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OVERLORD- Diamond Member
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crankbndr- Top Poster
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Location : Homestead FL
Re: On the Ramp Right Now!
Thanks Lieven!
I actually owned one of the Cox ST-3's, in that exact color scheme. It was the first throttled engine I'd ever encountered, and it was great fun being able to taxi, takeoff, and land at will. The wheels were so small though, that my ballfield runway wouldn't work, so I flew it from the widest section of pavement on the main street of the small town where I lived.
Still watching for a flyable one to turn up on Ebay!
I actually owned one of the Cox ST-3's, in that exact color scheme. It was the first throttled engine I'd ever encountered, and it was great fun being able to taxi, takeoff, and land at will. The wheels were so small though, that my ballfield runway wouldn't work, so I flew it from the widest section of pavement on the main street of the small town where I lived.
Still watching for a flyable one to turn up on Ebay!
Kim- Top Poster
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Posts : 8509
Join date : 2011-09-06
Location : South East Missouri
Re: On the Ramp Right Now!
cribbs74 wrote:Oh my, now why doesn't cool stuff like that ever land on an AFB.
They haven't been in service for awhile???
Re: On the Ramp Right Now!
Thanks! Gonna follow that one!
Kim- Top Poster
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Posts : 8509
Join date : 2011-09-06
Location : South East Missouri
Kim- Top Poster
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Posts : 8509
Join date : 2011-09-06
Location : South East Missouri
Re: On the Ramp Right Now!
Kim, maybe you could do me a favour. If possible, take some close ups of the ,,fresco,,
coxaddicted- Gold Member
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