Duke Ad

[rpadula]

I've been cleaning out the closet again and found this ad in a stack of papers.

 

[Ted]

286 mph... oh, those poor engines.

Thanks for sharing!

 

[sba55]

Those were the times. Dukes are so good looking; and they just reignite the spirit of when GA was doing so well

 

[Richard]

12,000+ airports!

 

[rpadula]

286 mph... oh, those poor engines.

Thanks for sharing!

What % power are we talking about to run it at 286 mph? Full rental power??

 

[steingar]

Found a guy at the fair selling old adverts, bought a Cherokee advertisement to hang on my wall.

 

[Ted]

What % power are we talking about to run it at 286 mph? Full rental power??

I only have a 60/A60 manual handy, but that lists 79% power (maximum continuous or full throttle, and says the best you'll get is 282 mph at 26,000 ft. 2750 RPM, 36", 22.4 gph a side.

That's probably running everything at redline temperatures. By comparison, in the Chieftain we normally run 2300 RPM, 33", 21 gph a side. That's much less power on about the same fuel to keep the engines happy.

 

[EdFred]

I only have a 60/A60 manual handy, but that lists 79% power (maximum continuous or full throttle, and says the best you'll get is 282 mph at 26,000 ft. 2750 RPM, 36", 22.4 gph a side.

Ugh.

I don't often operate turbos but when I do I make sure to break them.

Stay current my friends.

 

[tonycondon]

they don't mention the weight regimen required to stay current with single engine ops.

 

[Ted]

Ugh.

I don't often operate turbos but when I do I make sure to break them.

Stay current my friends.

Yeah, at 26,000 ft, 2750 RPM and 36" you're probably right near both the maximum pressure ratio and maximum flow across the turbo. Even then, that wouldn't necessarily be too terrible, but at that fuel flow you're probably right at about peak TIT.

Also keep in mind that these engines are direct drive, not geared. So that's actually 2750 RPM of propellers singing in your ears. Not sure how well insulated the Duke's cabin is, but that's a lot of RPM, takeoff was 2900 RPM.

they don't mention the weight regimen required to stay current with single engine ops.

From the manual, assuming that you lost an engine right after takeoff at 6775 (MGTOW), you'll get a bit under 300 FPM climb on one engine at sea level. That sounds optimistic to me.

 

[tonycondon]

my understanding is the Duke has the maximum allowed for certification rudder pressure required in an engine out scenario

 

[Ted]

my understanding is the Duke has the maximum allowed for certification rudder pressure required in an engine out scenario

Oh, misread what you meant. It doesn't say anything about being required to be an Olympic dead lift champion for flight.

 

[Ghery]

Lower right corner has an ad for "Learn to fly and you could win a $50,000 airplane". Well used airplane today. Probably one heck of a plane then.