Curtiss OX5

Starting a 1918 V8 Curtiss OX5 aircraft engine by Theo and Yesterdays antique motorcycles
Nederweert The Netherlands

Category:

Autos & Vehicles

Tags:

• Curtiss
• OX2
• aircraft
• engine
• airplane
• V8
• noisy
• yesterdays
• The
• netherlands

[yesterdaysnl]

Here`s some tech talk guys….Curtiss OX5 1918. 8 cylinder water cooled.90HP @ 1200rpm.Max 1400rpm for a short time.Bore and stroke 4 x 5 inch Total 500 cubic inch (8 liters).Pressure feed lubrication by oilpump via camshaft and crankshaft.Oil 4 Gallons (15 liters).Oil consumption (1.2 liters) per hour at full speed.Fuel consumption 9 Gallons per hour at full speed.

[yesterdaysnl]

On the valvetrain there was no provision for lubrication other than oil applied by hand. 50 hours was the typical total life limit of the valvetrain…..!...

[yesterdaysnl]

Lubrication by hand was done every time at take off.The factory adviced to take the complete motor apart after 50 hours of service and replace all worn part, especially the valvetrain parts.This engine could certainly benefit from the mass and drag of a big wooden prop. With that installed, the engine will tick over and run at high speed nicely.

[yesterdaysnl]

.Valves have springs holding down the valves on their seats.The exhaust valves have conventional pushrods, situated inside the hollow inlet push (pull ) rod.The inlet valve has also another stronger spring that holds the pushrod ( in fact a hollow pullrod) in constant contact with the camshaft.The camshaft has a flat point , the pullrod will follow and pull open the inlet valve while passing this flat point.

[yesterdaysnl]

For practical reasons we`ve put on an electric 2HP Volkswagen starter and a Porche flywheel.

By the way: Gnome Monosoupape Rotary Aero engines had a total lifespan of 25 hours !.....

[ijzerable]

dankjewel voor de mooie video!

[hoodoo2001]

Wonderful engine. We are having some valve sticking issues with our OX-5. It could be several things, we are suspecting fuel issues. We are running 100 avgas. Also do you have any techniques for lubing the valves? Would love to see a video of you lubricating the rocker arms and/or valves....I am not sure if we are getting it done right. 

[VMATT500C]

Curtiss  was one cool man. Are you guys now deaf ?

[beeroosterm]

Jesus. 500 cubic inches for 90 hp? Sounds like it puts out 500.

[RIPSNZ]

I'm into high tech high hp/ci japanese engines but I have to say, THIS IS DAMN COOL!!!!

[djlau1]

dat is eenprachtige motor man egt waar!!!

[peepeevagi]

You could literally throw a wrench at it and completely destroy it O.o

[kevintheblacksmith]

Very cool !!!!!

[iexploderacoons]

SACRAFICE A PRIUS TO IT!