New Engine on New homebuilt

On Fri, 12 Aug 2005 20:45:36 -0700, Jerry Springer
wrote:

wrote:
Jerry Springer wrote:

"Gig 601XL Builder" wr.giacona@coxDOTnet wrote


Tie the aircraft to a pole and...

Not a good idea for a new or rebuilt engine. It needs air flowing
to keep cylinders cool. Happened to a local guy who thought it was neat
to taxi all over the area in his new airplane, overheated cylinders and
it burned a lot of oil from the very beginnoing. He had to rebuild the
cylinders.



I can see that happening at idle speeds but if you run the
engine up to full throttle won't the prop wash provide enough
cooling, depending on the cowling of course.

Actually it will not, a prop turing at full speed with airplane not
moving is not very efficient at all. It also take forward speed to
create enough airflow for cooling. A lot of homebuilts have very tight
cowlings and need a fair amount of pressure to force the air down and
around the cylinders

It depends on how well the engine is cooled. Many "Spam Cans" won't
heat up enough to get the contaminants out of the oil, but new, or
rebuilt engines are a different animal.

OTOH isn't there a requirement for one hour on the engine before it
takes to the air, or is that before the FAA inspection and sign off?

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com
Jerry

"Roger" wrote in message
...
snip

OTOH isn't there a requirement for one hour on the engine before it
takes to the air, or is that before the FAA inspection and sign off?

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

I've heard of the 1 hour engine run requirement, but I've never found it in
any official (FAA) or reputable (EAA) source. I am aware of some DAR's who
require it.

My DAR didn't mention it.

Personally, if I had access to a test stand with proper cooling set-up, I'd
run a new engine at least an hour. However, installed on an aircraft, and
without a test club, lengthy engine runs on the ground are not recommended
per Lycoming's new or remanufactured engine break-in procedure.

KB

On Sun, 14 Aug 2005 08:03:47 -0400, "Kyle Boatright"
wrote:


"Roger" wrote in message
.. .
snip

OTOH isn't there a requirement for one hour on the engine before it
takes to the air, or is that before the FAA inspection and sign off?

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

I've heard of the 1 hour engine run requirement, but I've never found it in
any official (FAA) or reputable (EAA) source. I am aware of some DAR's who
require it.

My DAR didn't mention it.

Personally, if I had access to a test stand with proper cooling set-up, I'd
run a new engine at least an hour. However, installed on an aircraft, and
without a test club, lengthy engine runs on the ground are not recommended
per Lycoming's new or remanufactured engine break-in procedure.

On my rebuild in the Deb they told me to take minimum taxi time, get
it in the air and run the crap out of it. The first hour was running
80 to 85% with a lot of power changes. The rings seated in just a few
hours. I don't remember just how many now, but it wasn't long.
Although they were concerned with temps (which weren't a problem) in
this particular case it sounded more like they were interested in the
ring seating. It worked. Nearly a 1000 hours later and it still uses
less than a pint in 25 hours.

That puts the way you run the engine at odds with the way you want to
start your test flights, so likewise, I'd prefer to run the engine in
on a test stand, but unfortunately I don't think that is going to
happen.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

KB