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Search: Posts Made By: Walter Atkinson
Forum: Messages 07-07-05, 08:54 PM
Replies: 46
Views: 165,372
Posted By Walter Atkinson
SkyKing: **Oh... and think about this: If...

SkyKing:

**Oh... and think about this: If Cessna's R&D team really thought there was a 'problem' with the engine driven fuel pump getting warm, erghhh, I mean 'HOT'... HEY... they wouldn't have put...
Forum: Messages 07-07-05, 12:44 PM
Replies: 46
Views: 165,372
Posted By Walter Atkinson
According to the manufacturer of the boost pumps,...

According to the manufacturer of the boost pumps, the electric boost pumps are made for continuous operation. I do not worry about using them to suppress vapor. That's one BIG reason they are...
Forum: Messages 07-04-05, 08:22 PM
Replies: 46
Views: 165,372
Posted By Walter Atkinson
**This again concurrs with my theory that the hot...

**This again concurrs with my theory that the hot engine causes the fuel to vaporize in the higher (less gravity flow), slightly warmer (less air flow), and longer fuel line. **


The problem can...
Forum: Messages 04-29-05, 09:30 AM
Replies: 21
Views: 49,792
Posted By Walter Atkinson
Big AL is right. Leaks whether fuel or air WILL...

Big AL is right. Leaks whether fuel or air WILL cause these symptoms. If it's leaking either, it's no longer a conforming engine. Non-conforming engines don't run as well as conforming ones! <g>
Forum: Messages 04-28-05, 02:47 PM
Replies: 21
Views: 49,792
Posted By Walter Atkinson
You can go to the TCM website and download the...

You can go to the TCM website and download the TCM Service Bulletin 97-3b. It explains all of the fuel setups like your good mechanic accomplished!

Setting the low pressure reading to the bottom of...
Forum: Messages 04-28-05, 11:05 AM
Replies: 21
Views: 49,792
Posted By Walter Atkinson
Kevin: Thank you for that link. There is some...

Kevin:

Thank you for that link. There is some misinformation in it I'd like to address. To wit:

1) Someone said that during an in-flight mag check that EGTs and CHTs would rise. During any mag...
Forum: Messages 04-27-05, 12:19 PM
Replies: 21
Views: 49,792
Posted By Walter Atkinson
While I got a chuckle out of your wisecrack, it...

While I got a chuckle out of your wisecrack, it was non-contributory to furthering the group's understanding of the issue being discussed.

Why not offer some data on the subject--if you have any. ...
Forum: Messages 04-27-05, 10:24 AM
Replies: 21
Views: 49,792
Posted By Walter Atkinson
Kevin: The only reason I post the following is...

Kevin:

The only reason I post the following is to point out that my recommendation is based on a lot of real-world AND research experience. Just for the record, my qualifications are:
ATP SEL&S,...
Forum: Messages 04-27-05, 09:19 AM
Replies: 21
Views: 49,792
Posted By Walter Atkinson
Craig: I will bet that this is ignition-related....

Craig:

I will bet that this is ignition-related. When the engine is cold, it requires a bit more charge to jump the electrodes. Try an in-flight, LOP mag check, and I'll bet the problem will...
Forum: Messages 04-12-05, 10:57 AM
Replies: 33
Views: 89,979
Posted By Walter Atkinson
Kyle: Ya, know if the guy had simply left the...

Kyle:

Ya, know if the guy had simply left the front engine off through the landing, he probably wouldn't have toasted the cylinders so quickly. As you said, in-flight restarts are hard on an engine...
Forum: Messages 04-05-05, 09:49 AM
Replies: 33
Views: 89,979
Posted By Walter Atkinson
Larry: ** It would make sense to me to have them...

Larry:

** It would make sense to me to have them leaned out as much as possible.**

No, you want BSFC(min) for max engine efficiency. That would be at about 15-20 LOP at the reduced power you would...
Forum: Messages 04-05-05, 09:30 AM
Replies: 12
Views: 34,811
Posted By Walter Atkinson
Kyle: **Back on the subject of CHT's,...

Kyle:

**Back on the subject of CHT's, detonation, etc. If I am understanding correctly, CHT's are primarily a function of internal cylinder pressure (which, in turn, is influenced by the timing of...
Forum: Messages 04-04-05, 01:58 PM
Replies: 12
Views: 34,811
Posted By Walter Atkinson
That is most curious. That is not at all what...

That is most curious. That is not at all what George's research has shown to be the case.

Walter
Forum: Messages 04-04-05, 12:53 PM
Replies: 12
Views: 34,811
Posted By Walter Atkinson
** With American Aviation intercoolers on my 73...

** With American Aviation intercoolers on my 73 P337, if I used the stock MP/RPM settings, I would get higher fuel flows and faster airspeeds, indicating to me that the engine was putting out more...
Forum: Messages 04-04-05, 11:12 AM
Replies: 12
Views: 34,811
Posted By Walter Atkinson
Kyle: OK, now I see what you are saying. Yes,...

Kyle:

OK, now I see what you are saying. Yes, but not significantly. CHT is basically a function of internal cylinder pressure. Other factors are pretty minimal by comparison. What the higher...
Forum: Messages 04-04-05, 09:12 AM
Replies: 12
Views: 34,811
Posted By Walter Atkinson
Kyle: The thoughts about adjusting MP for an...

Kyle:

The thoughts about adjusting MP for an intercooler are misplaced for the reason I cited... the exhaust backpressure is negating the increase in power from the lower temperature. ...
Forum: Messages 04-03-05, 01:50 PM
Replies: 12
Views: 34,811
Posted By Walter Atkinson
Intercoolers are a VERY good thing. As you...

Intercoolers are a VERY good thing. As you correctly pointed out, they increase the detonation margin. All other stated reasons for having an intercooler are questionable at best.

You made some...
Forum: Messages 03-28-05, 05:07 PM
Replies: 33
Views: 89,979
Posted By Walter Atkinson
Proto: **There is no problem to maintain this...

Proto:

**There is no problem to maintain this bird in the air with one engine. I think, we can even fly with 14 gal/hour (LOP) with one engine at FL 120. Speed > 120 KTAS..**

If that's true, then...
Forum: Messages 03-26-05, 10:12 AM
Replies: 33
Views: 89,979
Posted By Walter Atkinson
Gentlemen: The answer is in the science. There...

Gentlemen:

The answer is in the science. There are two things required to achieve max range.

1) Attain the best L/D airspeed (someone said that's 100 knots in a Skymaster. I cannot confirm that,...
Forum: Messages 03-26-05, 10:00 AM
Replies: 6
Views: 17,261
Posted By Walter Atkinson
The hot running during breakin is why you need to...

The hot running during breakin is why you need to run VERY rich or do the breakin like we do, LOP. It will run much cooler. As soon as the rings seat, the CHTs will come down a bit.

The science...
Forum: Messages 03-23-05, 04:10 PM
Replies: 9
Views: 21,163
Posted By Walter Atkinson
We will be in OSH from Monday-Saturday for sure. ...

We will be in OSH from Monday-Saturday for sure. Come by the GAMI booth and we'll hook up.
Forum: Messages 03-23-05, 12:02 PM
Replies: 9
Views: 21,163
Posted By Walter Atkinson
One of you guys with a really nice Skymaster...

One of you guys with a really nice Skymaster needs to step up! A Skymaster is a cool-looking airplane and Wings to Adventure really oughta do a profile on it. <g> It oughta look good in High...
Forum: Messages 03-10-05, 12:24 PM
Replies: 59
Views: 172,625
Posted By Walter Atkinson
**fanitical opinions are on both sides** That...

**fanitical opinions are on both sides**

That may well be true.

OTOH, the data has no opinon. It is what it is. It is measureable by any observer. A person is either six feet tall, or they are...
Forum: Messages 03-09-05, 05:52 PM
Replies: 59
Views: 172,625
Posted By Walter Atkinson
Kyle: Oh, I see what you're asking now. The...

Kyle:

Oh, I see what you're asking now.

The thetaPP will be affected by the rpm, not the load on the crank of whether it's going "uphill" or "downhill." If the rpm does change with a fixed pitch...
Forum: Messages 03-09-05, 05:48 PM
Replies: 54
Views: 171,360
Posted By Walter Atkinson
Larry: ** to bad the JPI 900/930 can't be...

Larry:

** to bad the JPI 900/930 can't be certified. **

I think it's being certified now and may be available as such buy SnF. I could be mistaken on that, but I do think that's the plan. It...
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