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Search: Posts Made By: SNS3Guppy
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Forum: Tech Log
28th May 2008, 18:40
Replies: 39
Views: 8,035
Posted By SNS3Guppy

Okey dokey. ...

Okey dokey. Cattleflyer/ssg/strickle451/tankdriver45/onpercenter is being added to the ignore list, until he gets banned too.

After his "which side" thread comments in this forum, the folks in...
Forum: Tech Log
27th May 2008, 16:21
Replies: 39
Views: 8,035
Posted By SNS3Guppy

You're always best lighting off at the maximum...

You're always best lighting off at the maximum speed you can get.

Think about it this way; there's never an airstart checklist which tells you to reduce airspeed to the minimum possible to slow...
Forum: Tech Log
27th May 2008, 10:13
Replies: 39
Views: 8,035
Posted By SNS3Guppy

Max motoring means just what it says; until the...

Max motoring means just what it says; until the maximum RPM's are reached that are deliverable by the starter under a given voltage or air pressure; typically only a few seconds longer than the...
Forum: Tech Log
27th May 2008, 02:16
Replies: 39
Views: 8,035
Posted By SNS3Guppy

Our checklist on the JT9D (B747-200) simply says...

Our checklist on the JT9D (B747-200) simply says "max motoring," which the FE calls out during the start process. The FO moves the start lever to idle, (or rich) at max motoring.
Forum: Tech Log
24th May 2008, 22:50
Replies: 39
Views: 8,035
Posted By SNS3Guppy

The Garrett TPE-331-10 is best run to max...

The Garrett TPE-331-10 is best run to max motoring RPM prior to the introduction of fuel. Garrett (Honeywell) strongly recommends it.

You've probably not had the opportunity to use the rapid...
Forum: Tech Log
24th May 2008, 21:44
Replies: 39
Views: 8,035
Posted By SNS3Guppy

Max motoring speed is typically 18-20% depending...

Max motoring speed is typically 18-20% depending on the type of starter motor, and takes only a few seconds longer than achieving minimum RPM.

You've really no experience with this, have you?

...
Forum: Tech Log
24th May 2008, 00:09
Replies: 39
Views: 8,035
Posted By SNS3Guppy

Or a borescope inspection when looking for other...

Or a borescope inspection when looking for other damage. It may also show up as an early requirement for a blade or inlet guide vane replacement, as do streaking nozzles.



There's a two-fold...
Forum: Tech Log
23rd May 2008, 20:38
Replies: 39
Views: 8,035
Posted By SNS3Guppy

That's not a hung start. That's either a weak...

That's not a hung start. That's either a weak battery or a starter problem.

A hung start occurs typically when the engine has experienced a lightoff. What you're describing is a failure to...
Forum: Tech Log
23rd May 2008, 19:51
Replies: 39
Views: 8,035
Posted By SNS3Guppy

Not at all. The starter is insignificant in...

Not at all. The starter is insignificant in comparison to the engine in terms of cost or importance. The starter is just an accessory.

Starters have duty limitations which prevent excess use...
Forum: Tech Log
23rd May 2008, 17:57
Replies: 39
Views: 8,035
Posted By SNS3Guppy

This is not correct. While thermal damage can...

This is not correct. While thermal damage can occur in the burner cans due to a hung start or introduction of fuel at too low a speed, the problem which occuring isn't fuel burning beyond the cans...
Forum: Tech Log
23rd May 2008, 06:39
Replies: 39
Views: 8,035
Posted By SNS3Guppy

Seeing as your starter stays engaged and running...

Seeing as your starter stays engaged and running typically up to 45 or 50% N1...how do you imagine the starter might be stressed allowing it to drive the engine to it's maximum motoring RPM?

It...
Forum: Tech Log
23rd May 2008, 05:55
Replies: 39
Views: 8,035
Posted By SNS3Guppy

It's always been the policy in any turbine I've...

It's always been the policy in any turbine I've flown to introduce fuel at max motoring speed. It's not bad for the starter in the least, and the start temp is of far greater interest and importance...
Showing results 1 to 12 of 12


 
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