Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

Go to Thread: Previous•Next
Go to: Forum List•Message List•New Topic•Log In


danmas
Dan Masters
Alcoa, Tennessee
(578 posts)

Registered:
10/28/2007 12:11AM

Main British Car:
1974 MGBGT Ford 302

authors avatar
Upside down lubrication.
Posted by: danmas
Date: September 30, 2010 10:05PM

OK, I'm not as sharp as I should be. Not only do I miss the answer, I far too often miss the question. In the report on the 2008 V8 meet, there was a bit about a 215 aluminum V8 being used upside down in an airplane. [www.britishv8.org]

Normally, oil is pumped through the engine and then it drains back to the sump for recirculation. In this case, the oil would drain back to the valve covers and the underside of the pistons.

I've seen airplanes fly upside down many times, but it never occured to me until now to question the oiling system operation when upside down.

How is that dealt with?


7sand8s
Dennis Miller

(36 posts)

Registered:
09/21/2008 10:47PM

Main British Car:
Re: Upside down lubrication.
Posted by: 7sand8s
Date: October 01, 2010 08:37AM

They use an inverted oil system:
[www.aircraftspruce.com]
The fuel system is a header tank or flop tubes in the tanks for inverted flight.
Fuel injected engine.


flitner
John Fenner
Miami Fl
(168 posts)

Registered:
03/11/2010 10:58AM

Main British Car:
1972 MGB 350 CHEVY

Re: Upside down lubrication.
Posted by: flitner
Date: October 05, 2010 08:10PM

The oil system pulls off of a specially designed upper pickup in the crankcase, working off of gravity in an upside down/inverted flight situation for an unlimited time,however the fuel sump in the airframe makes up for +- 60 seconds of inverted flight on a aerobatic manuever as per a 69 Citabria "Airbatic" spelled bakerds!
Get Your BritishV8 T-shirt by clicking here


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Upside down lubrication, with a girdle ?
Posted by: roverman
Date: October 31, 2010 06:15PM

I.E. "side oiler girdle' for Rover. Monoblock design as main caps and girdle are one piece. Main oil galley machined in girdle, feeds lateral ports to lower bearing halves. Initially thought was to have these lines feed nearly horizontal into bearing shells. Great for "swirl and wedge effect", but bad for feeding oil into crank oil holes,(to rods).Good compromise angle ? Since this is true "priority oiling", I suspect a reduced port size to lube cam bearings should be required. Mechanical roller lifters to be splash lubed. Rockers lubed by external lines to shafts. Anyone? Thanks, roverman.



Edited 2 time(s). Last edit at 10/31/2010 06:18PM by roverman.


Wotland
Wotland Wotland

(105 posts)

Registered:
01/07/2008 08:14AM

Main British Car:
Re: Upside down lubrication.
Posted by: Wotland
Date: November 01, 2010 04:22AM

Art, you need of this LOL :
http://i20.servimg.com/u/f20/11/14/83/96/sump_g12.jpg


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Upside down lubrication.
Posted by: roverman
Date: November 01, 2010 08:00PM

Wotland, so pfunny ? The engine needs the girdle, so crank does'nt get "cranky"-get it ?


Go to: Forum List•Message List•New User Registration•Log In
Sorry, only registered users may post in this forum.