turbine boat question??

[YoungPerformance]

Excellent thread. I don't know my azz from a tree trunk when it comes to turbines. I am enjoying learning.
Eddie

[40FlatDeck]

Erik,
You can see it coming in the Pyrometer. Kill fuel and continue the spool.
Will drop the pyro almost instantly.

Wiring the Start fuel nozzles on a dedicated switch allows
the operator to kill the start fuel in the event of a Hot start.

I have had my Pyro pegged more then once. I was running home heating oil i had some plugged start fuel nozzles. let me tell you smoked more the a freight train and the pyro went to the moon.
Im at the dock and my crew was there holding the boat. I started spooling the starboard motor and I looked up and my crew were all freakin running away I looked behind me and the flame had to be 10 feet high
I just released the fuel and continued spooling exstinguishing the flame.
No damage occured what so ever.

There pretty stout engines and the more time you spend around them the more you get to know them.

So you better make sure you have a good set of batterys at hand to keep it spooling! How long does it take for startup? Is there a warm up period?

Sorry for all the questions!

Erik

[DONZI]

So you better make sure you have a good set of batterys at hand to keep it spooling! How long does it take for startup? Is there a warm up period?

Sorry for all the questions!

Erik

Yes, Good Batteries required. I think the Wet Start vid. i posted might have been from this reason .

Here's Gerry on a start up vid. that i took in Fairhaven Ma..
http://www.youtube.com/watch?v=oG2DxMmKj3g

[KnotRight]

So you better make sure you have a good set of batterys at hand to keep it spooling! How long does it take for startup? Is there a warm up period?

Sorry for all the questions!

Erik

You will know when you turn the key on.
The first you do is look at your voltage on that motor.
I wired it off a Standard marine key switch.
Position 1. Key on. Energizes, The fuel cut off solenoid. All gauges on.
Position 2 (Crank motor for piston application) energizes the start fuel
solenoids. In the event of a hot start this portion of the switch is spring
loaded you simply let go and it shuts down the xtra start fuel.
I have a completely independent momentary switch for the spool.
This is in the event of a start issue you can continue spooling cooling the
motor.

A start takes approx 20 seconds.
No warm up period once there lit there ready to Rock.

[KnotRight]

Yes, Good Batteries required. I think the Wet Start vid. i posted might have been from this reason .

Here's Gerry on a start up vid. that i took in Fairhaven Ma..
http://www.youtube.com/watch?v=oG2DxMmKj3g

The crowd loves the count down 3-2-1 Contact.
Boy I really do look like a geek!

[Chris]

No warm up period once there lit there ready to Rock.

Is it not important to bring the oil up to operating temp or does it come up that fast?

[boostbros]

anyone watch the discover ch a few years ago when some guys took the wings off a star fighter and were going to try for land speed attempt. during trying to fire it up after several trys they hot started and melted all the blades you could see them coming out the back it a great vid but i can,t find it it was a big engine j7 maybe? anyone else watch it? sometimes it was painful to watch!

[Chris]

That was the North American Eagle LSR project.

The F104 had a single a GE J-79 engine. The F-4 used two and the B-58 used four of them.

[Rik]

Is it not important to bring the oil up to operating temp or does it come up that fast?

Nope, once it's lit (in a boat) you can hammer the hell out of it and go. Just point and shoot.

[Rik]

Here's the warm up process

http://www.youtube.com/watch?v=khnqr...eature=related

[KnotRight]

Is it not important to bring the oil up to operating temp or does it come up that fast?

No Chris the oil temperature in flight service according to the military
manual reads no minimum oil temperature warm up is required to achieve takeoff power. It does however give specifics about a over temp which
it reads anything over 93celcius write up required.
However I would consider some type of oil temp one would think
would be beneficial. I know I would never push my big blocks without some nice hot oil. The bearings are rollers and the seals carbon faced
which actually require oil and or compressor pressure on certain sides to seal properly.

One particular starting event I had was I had a seal actually stick and almost completely empty my sump tank The engine lit up and the pyro climbed
and there was a huge yellow flame which I think could have been viewed
from space. I shut her down and added 7 quarts and it never happened
again.

[boostbros]

http://www.vimeo.com/7379666 about 3/4 in the hot section is glowing red anyone seen that before?

[Rik]

http://www.vimeo.com/7379666 about 3/4 in the hot section is glowing red anyone seen that before?

I'm pretty sure that is the containment blanket. It is red from the start up.

[boostbros]

i think your right rik its just the way light hits it

[KnotRight]

What does the starter sytem look like and how does it work?

Here is the Starter/ Generator as Rik stated it doubles as a generator.

There are two versions of these a 200amp and a 300amp.

I paid 2500 each for these off a guy who bought 5000 of these off the
Army

The three polls fit a 00 lug one is ground, one is crank windings and the third
is Generator. Look closely you will see the exciter little #10 lugs.
When you put B+24 to this it will produce up to 300amps respectively.

This runs with the N1 system off a right angle drive and is always engaged.

[KnotRight]

Here is a picture out of my Student workbook that shows the
N1 and N2

N1= purple... Gas producer
N2= red .... Power Turbine


Note the bottom of the n1 with the studs on the right angle
that is where the Starter mounts.
SCS makes a right angle drive that will locate that above the engine for easy
Access.

[Rik]

Luckily, the Lycomings have a starter generator. The T-58's don't have this nor do some of the others other there. Try attaching a 400 amp alternator to an engine that has no pulleys

[nthdegree]

Luckily, the Lycomings have a starter generator. The T-58's don't have this nor do some of the others other there. Try attaching a 400 amp alternator to an engine that has no pulleys

we do it every day..it's called a gearbox....

[Rik]

we do it every day..it's called a gearbox....

So do I. It is just a lot easier when one does not have to make one or for the customer to not have to pay for one.

[Chris]

I saw a setup on a very early turbine rig where they were running an alternator and a water pump off of the output shaft. They had a pulley in between the shaft couplings.