How many people here have taken off running on five cylinders?
It's surprisingly hard to do with a lycoming O360.
When I was young and dumb I ask for a ride in a guys Comanche 400. I was really surprised as to how rough it ran since the IO 720 was supposed to be incredibly smooth. Well when one cylinder is dead because both ignition leads were not connected after the last annual, 2 flights ago…. Well it doesn’t run very smoothly at
all, especially when you don’t bother with no stinking run ups
Re: Why the obsession with "complete" run ups 100% of the time
Posted: Sun Jun 27, 2021 10:26 pm
by Colonel
IO-720 has eight cylinders
So you took off with as many cylinders as a Continental R-670 :^)
Re: Why the obsession with "complete" run ups 100% of the time
Posted: Mon Jun 28, 2021 5:17 pm
by David MacRay
Is the IO-720 the basis of the engine Mike Patey is building around right now?
Re: Why the obsession with "complete" run ups 100% of the time
Posted: Mon Jun 28, 2021 6:08 pm
by Colonel
Anyone using an IO-720 in a new build, probably goes to those "Renassiance Fairs"
on the weekend, where you dress up like characters from the middle ages.
If you want to make 400hp with a piston engine for an aircraft, that's probably
a lot cheaper and more reliable.
Not a fan of diesels.
Another (turbine) choice in that horsepower neighborhood might be the Allison 250
(420hp) which Maule used to make an insane amphib float plane with a 15 minute range.
The Walter M601 used to be all the fashion, but didn't GE buy them to shut them
down?
And then, there is the PT-6. There will always be the PT-6 (chorus of angel voices).
Re: Why the obsession with "complete" run ups 100% of the time
Posted: Mon Jun 28, 2021 6:21 pm
by David MacRay
Let’s put a PT-6 in a Bearhawk Patrol.
I like diesels. So does Mr Dries. He has more guys and funds to build cool stuff though.
In conclusion I would definitely fly to renn fair to leer at a mid ‘80s Kelly Bundy. Possibly a present day Christina if the food was good and they had catapult demonstrations.
Re: Why the obsession with "complete" run ups 100% of the time
If you want to make 400hp with a piston engine for an aircraft, that's probably
a lot cheaper and more reliable.
Yup there is no replacement for displacement. 10..2 litres makes a lot of effortless horsepower.
As for the IO 720, I never understood why American pilots were not all over this engine. I mean my Mother drove a Dodge Dart with a straight six. My Fathers car had a V8 hemi
Re: Why the obsession with "complete" run ups 100% of the time
Posted: Tue Jun 29, 2021 1:48 pm
by Liquid_Charlie
Well it doesn’t run very smoothly at
all, especially when you don’t bother with no stinking run ups
That has nothing to do with run ups. It just demonstrates issues do surface and are apparent without doing a run up.
Your guy was just dumb.
Re: Why the obsession with "complete" run ups 100% of the time
Well it doesn’t run very smoothly at
all, especially when you don’t bother with no stinking run ups
That has nothing to do with run ups. It just demonstrates issues do surface and are apparent without doing a run up.
Your guy was just dumb.
Yup, and I was dumber just sitting there not saying anything when I knew something wasn’t right
Re: Why the obsession with "complete" run ups 100% of the time
Posted: Wed Jun 30, 2021 1:23 pm
by Liquid_Charlie
Yup, and I was dumber just sitting there not saying anything when I knew something wasn’t right
I think we are all guilty of that to some degree. The real tragic examples where people are killed because of it. I know of several accidents where training pilots failed to react to a bad situation created by the "other" guy --
Re: Why the obsession with "complete" run ups 100% of the time
Posted: Wed Jun 30, 2021 6:52 pm
by Colonel
There's a really important lesson to learn here. The entire CRM industry is based on this, but ...
I'd rather be in shit and alive, than a good boy and dead.
I'll tell you a little secret: any time I am in a cockpit, I am Pilot In Command, regardless of any
bullshit paper. Nothing bad happens when I am in an airplane, even if people's feelings get hurt.
I can't possibly be the only person here, who's been fired in flight.
Anyone remember Ron Joyce? As if I would work for a donkey like that.
That's his airplane. I think it was 3 days old?
EDIT
Met his son, years later. I expected him to be a giant penis, but he was amazingly
a nice guy. Must have taken after his mother.
