Yes and no
The Bleed band closes at approx 85 percent n1.
Do you know what happens if it closes too late?
Here is the compressor section before balancing
also pictured is a set of Stainless compressor housings.
These were designed for salt water application for the navy.
Thread: turbine boat question??
Results 41 to 60 of 107
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01-26-2010 09:06 PM
Last edited by KnotRight; 01-26-2010 at 09:50 PM.
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01-26-2010 09:09 PM
Throttling which (n1 or n2) provides better throttle response?
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01-26-2010 09:22 PM
Now take this killer equipment and come to a race course no matter the conditions. Sit in a milling area for 20 min while 2-3 of the fastest turbine raceboats in the world and 3-4 of the fastest Piston boats circle around you all wanting to be king, intimidation moves , cutoff here, a little bump there , it's getting hot . smoke get her on plane...watch out...did he just cut us off......fkn d**k. Green green green Go Go go go
Hold the 3800 hp wide open for two miles or whenever you've scared the crap out of yourself (175 or so 2-4's is usual) and don't get pinched turn one coming easy easy... turn as fast as you possibly can without flipping the boat over. Pin it and hold for 1.5 miles over what is probably a quartering sea (don't miss a throttle an over speed will cost the team 100+ k) ...as fast as 3800 hp wll take you (Watch the boat 10 feet away next to you at the same speed) Another turn ..back down to 135 anything more and your swimming...ahhh flat water ahead after this little hole by the jetty....but a nasty dog leg with race boat wakes to turn on...concrete to your right ...please don't hook. Hold it down....como'n faster 150, 160,165 ...turn..easy...hold it...turn easy little more...straight ...Hold it hard into the harbor. Concrete post to the starboard Hair-pin ahead ..... All system down (Bleed bands Popping off like fire crackkers)... ready Turn Turn turn..Nail it .....Wide open Pinned
You have 11 more laps to go.. Welcome to Key west in a turbine boatMiss GEICO
Boost won't save you.
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01-26-2010 09:24 PM
Logically, I would think acceleration wise..throttling N2.. it would be like a clutch, if N1 is making the power, you are applying the power to N2. That would seem to be faster than increasing the power of N1 and applying it to N2. If your car is taking 4 grand and you dump the clutch your going to launch harder than stepping on the gas from idle.
P-4077 "The Swamp" S.B.Y.C. and Michigan medboat mothership
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01-26-2010 09:51 PM
WOW Maximus ! Thanks for the insight
Gerry, found that vid. -Wet start.
http://www.youtube.com/watch?v=gcWPIvfXkj8
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01-26-2010 09:56 PM
Balancing a set of pt wheels.
I could bore you guys with this info all night.
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01-26-2010 10:18 PM
the n2 is reduced with this planetary reduction assembly.
This is internal in the 53 it takes the output of the n2 down to 6600rpm max.
The 55 reduction is not internal in its attended application. (chinook)
Its original gearbox is useless for a boat.
This why I asked the phenomena guys what they were using.
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01-26-2010 10:41 PM
So how do you throttle the n2 . I understand the brake for nuetral shift control but the throttling you kind of lost me.
Also what is the life span of the planetarys and what do they run in for lubrication?
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01-26-2010 11:31 PM
thanks for the anwsers guys
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01-27-2010 12:33 AM
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01-27-2010 08:42 AM
i have opened a few t53s up and there is nothing to control n2 inside the engine the most basic way to describe a turbine gas producer is its a big blowtorch.....n1 and n2 control levers are strickly in the fuel control system? how does n2lever govern n2 speed? does it cut fuel or open bleed band? my brother is maintaince head at a power plant with 4 ge over 1 million hp gas turbines they are big and fasinating inside also helping a freind restore a few migs those engines are shakers you can grab the first row of blades and they are very loose and sound like wind chimes as it rotates at slow speed they lock in with centrifical force still does not seem right!
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01-27-2010 09:45 AM
There have been several changes over the years modifying the planetarys
according to the Military manual 5000 hours.
The entire lubrication system is a dry sump system.
the oil I use is Mobil Jet.
The N2 is not throttled but rather locked into position.
I run approx 12 of these in my system.