Orenda 14 Turbojet in the shop

We've got a 50's fighter jet engine in the shop, so let's have a look at it.
This engine was among the first to mount the powered accessories on the outside of the engine instead of clustered inside a forward nose cone. To drive those accessories, a way was needed to transfer power from the main rotor out to the cases. We look closely at just how that was done.

Category:

Autos & Vehicles

Tags:

• Orenda
• 14
• CF100
• Avro
• CF-100
• Canadair
• Sabre
• Saber
• turbojet
• compressor
• turbine
• radial
• driveshaft
• fsj
• Jay

[weaver2109]

I love how you pointed out that you shouldn't stick your fingers in it.

[AgentJayZ]

@weaver2109 I nearly lost half my right hand in the HP turbine of an RB211, and I should have known better. I escaped by about 1/4 of a second. Funny now, but only because I had that much time...

[gig651]

I am so impressed with your videos- fantastic information. I thought I read once, that earlier model turbojets discharged the lubricating oil into the exhaust. Is this true? Are planning to do a video on the lubrication system on a turbojet

[AgentJayZ]

@gig651 I know of no engine that uses a total-loss lube system. Maybe the expendable missle engines that are expected to last for about 20 minutes max, but I uderstood they use grease-lubed bearings and no oil at all.

The lube system in a turbine engine is a good idea, although there is nothing exotic there. Dry sump with synthetic oil sprayed on roller and ball bearings.

[rickey5353]

I've learned more about turbojet engines from watching your videos than a lifetime of reading and studying exploded view drawings. Keep up the good work, Jay.

[poppopscarvinshop]

During his 28 years with Lockheed, Ga. I heard a lot of good things about Avro from my dad!

Thanks Z!

[mpwelk]

Great videos, but I can figure out for myself not to stick fingers in there. :)

[AgentJayZ]

@memadmax69 yes, that is true...

[memadmax69]

@AgentJayZ Wouldn't it be small because it don't have to transfer power from a starter?

[AgentJayZ]

@xxJohn1977xx Someone once wrote that anybody can make something strong, but an engineers job is to make things strong enough and as light as possible. This is a military fighter jet engine, so the shaft is the right size to do its job. As I mention below, I've never heard of a radial drive shaft breaking.

The only weak spots are the temperature limits of the materials from which the hot section components are made.

Sir Frank himself recognized this in the 1930s.

[xxJohn1977xx]

Hi Jay, regarding that radial drive shaft that runs from the centre bearing-the one you removed. It looks quite small in diameter considering the very important job it does especially on an aircraft engine. Have you ever heard of one snapping? Maybe another idea for a new video - you could show us failed components on jet engines and any weak spots?

Thanks, John

[prandtl002]

@AgentJayZ Thats fine...thanks anyways.