1
00:07:23,400 --> 00:07:30,100
This is an annular combustor. And it's inside 
an outer combustor case.

2
00:07:30,110 --> 00:07:33,500
And from a different engine we're going to 
look at an outer combustor case.

3
00:07:33,510 --> 00:07:43,000
We'll see how complicated it is. This is 
one right here. It's a big piece of pipe 
but is really like a big annular chamber.

4
00:07:43,010 --> 00:07:46,000
It's very well made but there's really nothing 
to it.

5
00:07:46,010 --> 00:08:00,000
It's meant to contain the air pressure around 
the combustor and this one has two holes 
right there, those are for the igniters, 
those holes look like drains.

6
00:08:00,010 --> 00:08:09,000
It was blocked off, those ones are of an 
unknown... unknown purpose to me.

7
00:08:09,010 --> 00:08:21,200
That is where the hot air is taken off for 
the anti-icing and those two holes here, 
those are for the igniter plugs, see.

8
00:08:21,300 --> 00:08:23,000
Pretty complicated. Okay.

9
00:08:23,010 --> 00:08:29,200
A great deal of air is blasted into there 
and that air encounters this.

10
00:08:29,210 --> 00:08:31,100
Lets not block the light here.

11
00:08:31,110 --> 00:08:36,990
Ok, so air is rushing this way, is going 
to get to this solid surface and go around 
it.

12
00:08:36,990 --> 00:08:49,400
This surface and go around, and just go around 
and some of it is, that's where the fuel 
nozzle goes, some of it's going to get down 
a little circle, circular hole and travel 
into the combustion chamber.

13
00:08:49,410 --> 00:08:58,010
Now, all this other stuff, other air is blasting 
on the outside and it's got little holes 
to go in and it gets in whenever it can.

14
00:08:58,010 --> 00:09:02,000
And the holes get progressively bigger and 
then it ends.

15
00:09:02,010 --> 00:09:07,990
Ok, now it's upside down and the air comes 
out here.

16
00:09:07,990 --> 00:09:13,010
All the flame and all the combustion takes 
place inside this thing.

17
00:09:13,010 --> 00:09:22,400
And all the little holes everywhere are where 
cooling air, or the rest of the air, can 
leak in. By the time we get to my fingers 
right there.

18
00:09:22,410 --> 00:09:26,990
The cooling air is mixed with the combustion 
air and it's all one thing.

19
00:09:26,990 --> 00:09:29,100
And I like to call that working air.

20
00:09:29,110 --> 00:09:39,600
It's the hot combustion gases that go into 
the turbine so the way that the air is diverted 
to be cooling air is by the metal structure 
that this thing is.

21
00:09:39,610 --> 00:09:50,400
The combustor liner and by tuning the diameter 
and the number and the shape you can control 
how much air gets in, where it gets in and 
all that stuff.

22
00:09:50,410 --> 00:10:03,400
So that's how you control the amount of air 
that mixes with the fuel and the amount of 
air that mixes with what was once the air 
and fuel and is now flame.

23
00:10:03,410 --> 00:10:06,010
That's a combustion liner.

24
00:10:06,010 --> 00:10:14,400
This is an annular combustor that looks a 
lot like a series, a circle of individual 
combustor liners

25
00:10:14,410 --> 00:10:21,990
so it's always ... there's an evolution of 
shape from individual cans like those

26
00:10:21,990 --> 00:10:30,400
to a pure annular combustor like the LM2500 
which was featured in, I think it was your 
questions or jet questions 56 or something 
like that,

27
00:10:30,410 --> 00:10:34,990
and this is kind of an intermediate looking 
thing.

28
00:10:34,990 --> 00:10:47,900
So, one of the questions this month, this 
week, this day is by Nobeltnium.

29
00:10:47,910 --> 00:10:54,600
He asks: "Why are there little holes on the 
combustion chamber?"

30
00:10:54,610 --> 00:10:56,700
Pretty big question.

31
00:10:56,710 --> 00:11:02,200
And let's take a look at the cutaway in front 
of the shop to answer that question.

32
00:11:02,210 --> 00:11:10,000
Ok, we're here at the cutaway in front of 
the shop and we're going to see why you need 
to be more specific.

33
00:11:10,010 --> 00:11:15,200
Why are the little holes near the fuel nozzles 
or near the combustors?

34
00:11:15,210 --> 00:11:22,500
Let's see. Those little holes. Those little 
holes. Those little holes. These little holes. 
Those little holes.

35
00:11:22,510 --> 00:11:31,100
This little hole. That little hole. These 
little holes. Those little holes. Those little 
holes. This little hole.

36
00:11:31,110 --> 00:11:38,700
How about these little holes? That little 
hole? You see?

37
00:11:38,710 --> 00:11:43,900
That little hole. That little hole. There 
you go.

38
00:11:43,910 --> 00:11:45,400
Just try to be more specific!

39
00:11:45,410 --> 00:11:47,800
Oh, and what about these little holes?

40
00:11:47,810 --> 00:11:56,200
If you can't be more specific, at least put 
a second by second time signature on the 
video related to the question you're asking.

41
00:11:56,210 --> 00:12:00,300
Otherwise nothing means nothing. Nothing 
means nothing!

42
00:12:00,310 --> 00:12:06,200
Yeah, look at that, there's a lot of little 
holes everywhere.

43
00:12:06,210 --> 00:12:15,600
Ok, along the compressor, go to the front, 
past the actuating rings, looking on the 
intake.

44
00:12:15,610 --> 00:12:20,300
There we go, and some Speys in the background.

45
00:12:20,310 --> 00:12:30,200
Himjan asks: "Excuse me if the question is 
answered before, why do you need to separate 
fuel lines to start and to run?"

46
00:12:30,210 --> 00:12:39,300
Well, if you look at my "fuel nozzles 3" 
or "fuel nozzles 4", I'm not really sure 
which one, I can't remember.

47
00:12:39,310 --> 00:12:43,600
It shows the different patterns for starting 
and for running.

48
00:12:43,610 --> 00:12:52,200
For starting you need a nice fine atomized 
wide spray pattern to distribute flammable 
stuff everywhere so it'll catch fire.

49
00:12:52,210 --> 00:12:58,600
And then, when you are running, you need 
to pump massive amounts of fuel in.

50
00:12:58,610 --> 00:13:02,200
And so the two orifices are, well, different 
sizes.

51
00:13:02,210 --> 00:13:12,100
And on an old fuel system like this, this 
is an Orenda fuel nozzle, the same thing 
that's in that guy.

52
00:13:12,110 --> 00:13:17,400
Okay, see. That there's a connections here.

53
00:13:17,410 --> 00:13:25,100
It is continuous all the way through and 
they supply this little line that goes into 
a tiny orifice in the center of the fuel 
nozzle

54
00:13:25,110 --> 00:13:31,700
and they to supply a fine spray suitable 
for catching fire.

55
00:13:31,800 --> 00:13:42,100
Which is what you want. Independent of this 
connection, this goes all the way around 
the engine in one circle and it's supplied 
by one supply line from the fuel control.

56
00:13:42,110 --> 00:13:47,500
This one, and although it looks like they 
intersect there but they don't, it just looks 
like it.

57
00:13:47,510 --> 00:13:55,700
This is supplied by its own individual fuel 
line from the fuel distributor, field distribution 
block

58
00:13:55,710 --> 00:14:03,600
and supplies this large line and it introduces 
fuel from this larger annulus right there.

59
00:14:03,610 --> 00:14:08,000
The outer one and allows much more fuel to 
be introduced.

60
00:14:08,010 --> 00:14:12,600
So you can burn lots of it and make your 
jet fighter go almost 600 miles an hour.

61
00:14:12,610 --> 00:14:17,600
Let's take a look at the fuel distributor 
because it's quite interesting.

62
00:14:17,610 --> 00:14:22,700
We've seen all this before but it's always 
fun to revisit, isn't it?

63
00:14:22,710 --> 00:14:33,500
Hang on, there we go, you see how there are 
six individual lines leaving that and one, 
big one going in.

64
00:14:33,510 --> 00:14:41,100
That's the fuel distribution block and each 
of those lines goes to its own fuel nozzle.

65
00:14:41,110 --> 00:14:48,100
This is what's called the secondary line 
or secondary circuit.

66
00:14:48,110 --> 00:14:56,200
The primaries are for starting, secondary 
is that what you call the main running line 
and they come to each fuel nozzle.

67
00:14:56,210 --> 00:14:58,500
There's another one.

68
00:14:58,510 --> 00:15:05,700
And Seth Jensen asks, based on, uh, yeah.

69
00:15:05,710 --> 00:15:12,400
The "Rotor balance job on the J-44". He says: 
"This is the first time I've seen a centrifugal 
compressor on your channel.

70
00:15:12,410 --> 00:15:17,300
Any chance you could explain how they compress 
air as compared to an axial?"

71
00:15:17,310 --> 00:15:22,200
Ok. I will, but we're going to use your imagination. 
No diagrams.

72
00:15:22,210 --> 00:15:36,800
An axial compressor has 10 to 17 stages which 
is a lot of stages because each stage is 
not very ... doesn't have a very high compression 
ratio.

73
00:15:36,810 --> 00:15:43,700
Can raise ... it can compress the air by 
about 10 percent maybe 15 percent which is 
not very much.

74
00:15:43,710 --> 00:15:51,100
Whereas a centrifugal compressor, because 
it has more of a ... it's not a positive 
displacement device

75
00:15:51,110 --> 00:15:55,200
but it has more of a hold on the air, it 
contains it better.

76
00:15:55,210 --> 00:15:58,000
It's almost positive displacement but it's 
not.

77
00:15:58,010 --> 00:16:00,500
It can compress air up to 9 times.

78
00:16:00,510 --> 00:16:06,600
900 percent so 900 percent versus 20 percent 
is a big difference.

79
00:16:06,610 --> 00:16:15,300
Which is up why centrifugal compressor is 
usually one stage, sometimes there's two 
but usually one.

80
00:16:15,310 --> 00:16:30,600
So the air comes in the front of a big impeller, 
they call it, wheel, and it gets ... starts 
to turn and as it travels rearward,

81
00:16:30,610 --> 00:16:34,100
the impeller is shaped like you saw in the 
J-44 video.

82
00:16:34,110 --> 00:16:36,300
It's not here anymore because I shipped it 
back to Darren.

83
00:16:36,310 --> 00:16:47,900
And as it travels outward, it experiences 
increasing amounts of centrifugal or centripetal 
force.

84
00:16:47,910 --> 00:16:54,600
It's flung outward and the compressor works 
best when it's turning really fast

85
00:16:54,610 --> 00:16:59,600
And basically it savagely flings the air 
to the edge.

86
00:16:59,610 --> 00:17:06,990
And the wheel is usually as big as it can 
be made until it wants to fly apart at the 
operating speed.

87
00:17:06,990 --> 00:17:18,010
So you want to get the air rushing outward 
as hard as possible and as it speeds up, 
the pathway gets smaller.

88
00:17:18,010 --> 00:17:21,200
That does not do any compression at all.

89
00:17:21,210 --> 00:17:23,990
None, whatsoever.

90
00:17:23,990 --> 00:17:28,500
It just means that because the air is going 
so fast it has to.

91
00:17:28,510 --> 00:17:39,500
It has to pass through a smaller, the same 
amount of air going quickly goes through 
a small hole as going slowly through a big 
hole.

92
00:17:39,510 --> 00:17:41,700
That's why the passage gets smaller.

93
00:17:41,800 --> 00:17:48,000
The pressure at the intake and the pressure 
at the outlet of the impeller is exactly 
the same.

94
00:17:48,010 --> 00:17:50,200
Doesn't change at all. Nothing.

95
00:17:50,210 --> 00:17:56,200
Now at the edge of the impeller, if we turn 
it facing you, now it's facing you.

96
00:17:56,210 --> 00:18:00,010
We change from ... we change axis or whatever.

97
00:18:00,010 --> 00:18:03,300
The way we would draw things, I might have 
to draw this.

98
00:18:03,310 --> 00:18:04,700
No I'm not going to draw it.

99
00:18:04,710 --> 00:18:16,010
Ok, so your air is ... it's coming at me 
and it's rushing out to the side now in a 
very small height and width of a passage.

100
00:18:16,010 --> 00:18:19,700
All the way around so it's a complete circle.

101
00:18:19,710 --> 00:18:25,300
And it goes into diverging ... diverging 
pathways.

102
00:18:25,310 --> 00:18:35,700
And because the air slows down in that diverging 
pathway it gets compressed, hugely.

103
00:18:35,710 --> 00:18:43,800
Now I know you have difficulty with wondering 
how air rushing into an opening up cavity 
can be compressed, it seems crazy.

104
00:18:43,810 --> 00:18:47,010
"It shouldn't, it should be the opposite." 
Well it's not.

105
00:18:47,010 --> 00:18:53,990
Subsonic aerodynamics are very counterintuitive.

106
00:18:53,990 --> 00:19:03,990
If you look at the Bernoulli equation, the 
energy, the total energy of the flowing airstream 
stays the same.

107
00:19:03,990 --> 00:19:08,500
So the speed is traded for pressure.

108
00:19:08,510 --> 00:19:12,990
And I'm not going to try to prove it to you.

109
00:19:12,990 --> 00:19:14,000
You can do research on your own.

110
00:19:14,010 --> 00:19:16,010
That's how a centrifugal compressor works.

111
00:19:16,010 --> 00:19:18,010
So, very interesting question.

112
00:19:18,010 --> 00:19:21,000
I'm glad I didn't have to draw diagrams for 
that.

113
00:19:21,010 --> 00:19:27,800
There's lots of really cool animations and 
diagrams on the Internet that I have nothing 
to do with but I endorse entirely.

114
00:19:27,810 --> 00:19:37,200
Have a look at them and all I can talk about 
for Bernoulli's equation is read as many 
sources as you can until it finally makes 
sense to you.

115
00:19:37,210 --> 00:19:44,000
It's really hard to wrap your head around 
subsonic aerodynamics and then when things 
go supersonic it all changes.

116
00:19:44,010 --> 00:19:50,990
So try not to get confused and I can't explain 
it any better than that.

117
00:19:50,990 --> 00:19:55,000
Really good question, thanks Jeff.

118
00:19:55,010 --> 00:19:57,010
Okay.

119
00:19:57,010 --> 00:20:00,000
Now, all this stuff around us has something 
to do with the last question.

120
00:20:00,010 --> 00:20:05,300
Last question is by Jangle2007.

121
00:20:05,310 --> 00:20:11,800
When a customer send you a turbine engine, 
what is generally, typically wrong with it?

122
00:20:11,810 --> 00:20:15,990
And what work does the customer ask you to 
perform on it?

123
00:20:15,990 --> 00:20:24,010
Is the customer request as simple as: "See 
engine in close please, restore it to working 
condition at any cost". Sometimes.

124
00:20:24,010 --> 00:20:32,010
Or does a more nuanced conversation take 
place with customer involving the type of 
work involved, expected cost in parts and 
labor, etc.

125
00:20:32,010 --> 00:20:40,000
I understand that some of your work involves 
transforming an aircraft engine into ground-based 
turbine unit.

126
00:20:40,010 --> 00:20:49,000
Do some engines sent to you by customers 
fail a cost-benefit, a cost-benefit analysis 
in which case you notify the customer wholly 
macro buddy?

127
00:20:49,010 --> 00:20:55,010
I realized that the question may verge into 
proprietary company information.

128
00:20:55,010 --> 00:20:58,990
I'm not asking for company secrets.

129
00:20:58,990 --> 00:21:01,990
Okay. Yes to all of the the above.

130
00:21:01,990 --> 00:21:03,000
They're expensive.

131
00:21:03,010 --> 00:21:09,800
They're hugely expensive so they can cost 
millions of dollars to overhaul.

132
00:21:09,810 --> 00:21:21,990
And if one, if there's one problem the customer 
may find that in a borescope inspection or 
a visual external inspection and they'll 
ship it to us to say:

133
00:21:21,990 --> 00:21:22,200
"Can you fix that?"

134
00:21:22,210 --> 00:21:24,200
And we'll go: "Yes".

135
00:21:24,210 --> 00:21:31,010
Then we take the engine apart, we find other 
things like: "Hey that's cracked, that should 
be replaced, it's going to go" or: "This 
is worn out".

136
00:21:31,010 --> 00:21:35,000
And then the owner usually says: "Okay, fix 
it".

137
00:21:35,010 --> 00:21:44,990
Because you're not going to approve one repair 
job with a damaged part and say: "Just put 
it back together with the damaged part".

138
00:21:44,990 --> 00:21:46,010
Knowing that damaged parts going to cause 
failure.

139
00:21:46,010 --> 00:21:53,900
So each engine is a specific case, each operator 
has different requirements.

140
00:21:53,910 --> 00:22:00,900
If you're flying the thing, if it's in a 
military fighter jet or especially if it's 
in a passenger airliner, which we don't deal 
with.

141
00:22:00,910 --> 00:22:06,300
There are very stringent and expensive requirements 
to be met with.

142
00:22:06,310 --> 00:22:11,200
Every single component and every step of 
the way and it can cost a huge amount of 
money.

143
00:22:11,210 --> 00:22:22,900
If you have an industrial version of that 
engine and you say: "It sucked in a coke 
can and it broke something in the compressor, 
can you just fix it? Just get it running."

144
00:22:22,910 --> 00:22:29,400
We can do that and then we'll notice things 
saying that: "Well this looks really worn, 
this looks like it needs to be replaced".

145
00:22:29,410 --> 00:22:31,200
And the owner will go: "No, don't bother".

146
00:22:31,210 --> 00:22:34,600
And we'll go: "Okay, we're not guaranteeing 
anything".

147
00:22:34,610 --> 00:22:42,400
Or they'll say: "Good idea, let's increase 
the safety and performance of this engine 
and do that".

148
00:22:42,410 --> 00:22:52,400
And then other times they'll say: "Well, 
you know it's old and worn out and rather 
than spend millions of dollars making it 
new again we're just going to retire it".

149
00:22:52,410 --> 00:22:55,000
So it's like cars.

150
00:22:55,010 --> 00:22:57,800
Every car has its own story, every engine 
has its own story.

151
00:22:57,810 --> 00:23:03,300
There's a lot more leeway when it's an industrial 
engine and the owner literally can do whatever 
they want with it.

152
00:23:03,310 --> 00:23:13,600
With certain aircraft, military aircraft, 
they have high standards but they also are 
not bound by FAA regulations.

153
00:23:13,610 --> 00:23:24,400
They have their own. And if it's an FAA controlled 
situation like a commercial airliner you 
have to do what has to be done.

154
00:23:24,410 --> 00:23:28,000
There's no ifs, ands or buts and it's going 
to be expensive.

155
00:23:28,010 --> 00:23:37,600
We do not do that work because in a nutshell, 
and the short way of explaining it, massive 
amounts of paperwork in legalese.

156
00:23:37,610 --> 00:23:48,100
And we would need several more managers just 
to handle all the red tape, let's call it, 
so we don't do that.

157
00:23:48,110 --> 00:23:50,900
And there's a lot of job to do.

158
00:23:50,910 --> 00:24:00,600
There is a lot of work in the industrial 
sector and in the experimental aircraft and 
military aircraft market and that's what 
we stick to.

159
00:24:00,610 --> 00:24:04,300
But really the answer to your question is 
all of the above and none of the above.

160
00:24:04,310 --> 00:24:10,400
So, there you go. Good question Jangle2007.

161
00:24:10,410 --> 00:24:18,800
Oh, this is an example of how we transport 
an engine in a slightly non-standard way.

162
00:24:18,810 --> 00:24:23,200
So, this engine is finished it's an overhaul.

163
00:24:23,210 --> 00:24:25,000
It's ready to be shipped to the customer.

164
00:24:25,010 --> 00:24:33,900
This particular cart trolley, trailer, thingy, 
majig, whatever it is, it's designed to be 
used on an airbase only on flat ground.

165
00:24:33,910 --> 00:24:37,300
It has no suspension. Got brakes and steering 
but no suspension.

166
00:24:37,310 --> 00:24:41,100
And it is a universal kind of trailer.

167
00:24:41,110 --> 00:24:52,000
It can handle different engines but it's 
meant to be towed around on an airbase so 
the engine was shipped to us like this because 
there was no engine container.

168
00:24:52,010 --> 00:24:57,100
So now that it's finished it's mounted on 
it by the engine mounts to the trailer here.

169
00:24:57,110 --> 00:25:02,300
It's wrapped in bubble wrap and then shrink 
wrap. Not shrink wrap. What is this stuff?

170
00:25:02,310 --> 00:25:04,700
Plastic wrap, several layers.

171
00:25:04,710 --> 00:25:11,800
And then it's going to be on a truck on these 
tires. The trailer will be hooked to the 
trailer.

172
00:25:11,810 --> 00:25:18,800
The trailer of the truck will be lashed to 
this thing not over the engine and then it's 
going to be tarped.

173
00:25:18,810 --> 00:25:29,400
So what we've done, because the truck drivers 
request this and they love it when we do 
this because it saves a lot of time, is we 
put softeners on all the sharp corners.

174
00:25:29,410 --> 00:25:35,000
We got foam here, foam there and here and 
in the back in the corner.

175
00:25:35,010 --> 00:25:38,900
So that the truck drivers' tarp doesn't get 
holes born in it.

176
00:25:38,910 --> 00:25:44,800
This is going to be on the truck for a couple 
of days and so it's going to be protected 
from the weather.

177
00:25:44,810 --> 00:25:51,600
But it's a bit of an unconventional way to 
ship things because this is not ... it's 
not a shipping container.

178
00:25:51,610 --> 00:25:55,000
It's a transport stand for an airbase.

179
00:25:55,100 --> 00:26:01,700
Usually they're inside a metal can which 
provides complete protection from the weather.

180
00:26:01,710 --> 00:26:05,900
This is going to be fine for up to the week 
it's going to be.

181
00:26:05,910 --> 00:26:12,500
It's wrapped in a not exactly waterproof 
fashion because we've got these struts that 
we had to wrap around.

182
00:26:12,510 --> 00:26:20,500
But it's going to protect it from most contamination 
and then all of this is going to be under 
a tarp so it's going to be pretty good.

183
00:26:20,510 --> 00:26:22,900
That's one of the ways we ship an engine.

184
00:26:22,910 --> 00:26:25,800
And there you go.

185
00:26:25,810 --> 00:26:31,100
Well, funny you should ask that, as a bonus 
question.

186
00:26:31,110 --> 00:26:40,300
I might be a little bit behind the times 
here but I just looked at "Star Wars, The 
Force Awakens" and I was amazed.

187
00:26:40,310 --> 00:26:48,100
Was funny how in Star Trek, a lot of engine 
stuff that we deal with was in the background 
in the engineering section.

188
00:26:48,110 --> 00:26:56,400
And sure enough, when Khan Solo steps onto 
the Millennium Falcon and he's got three 
of these in his pocket.

189
00:26:56,410 --> 00:26:58,600
What the hell are they? What are those things?

190
00:26:58,610 --> 00:27:03,200
You tell me. This one slightly different. 
We're going to take a close look at this.

191
00:27:03,210 --> 00:27:08,900
It's pretty hard to tell because actually 
the movies are not that sharp, on my computer 
anyway.

192
00:27:08,910 --> 00:27:14,900
Just the previous I was looking at three 
of those right there. Hang on.

193
00:27:14,910 --> 00:27:24,200
What's this thing? This is ... read that.

194
00:27:24,210 --> 00:27:31,200
Why, of course it's a Vickers VB3497.

195
00:27:31,210 --> 00:27:45,100
What it is, it's a magnetic chip detector 
plug and got two o-rings on because it fits 
into a hole and then these two things lock 
it in place.

196
00:27:45,110 --> 00:27:51,900
That's a magnet and I'm not sure of these 
little tap, these little whatever they are, 
tabs.

197
00:27:51,910 --> 00:28:02,400
Things are on the ones in Han Solo's pocket 
and some of them have the o-rings removed 
and it looks like one of them has only one 
o-ring groove and the magnet is smaller.

198
00:28:02,410 --> 00:28:11,600
Because each engine is different, this is 
from a Rolls-Royce Avon, it looks familiar 
doesn't it? I think it does.

199
00:28:11,610 --> 00:28:17,000
Ok, if you're the prop guy for "Star Wars, 
The Force Awakens", I want to know if that's 
what this is.

200
00:28:17,010 --> 00:28:22,700
Otherwise anybody else has an idea ... I 
think that's what it is.

201
00:28:22,710 --> 00:28:30,500
There are probably Han Solo's whatever these 
things are supposed to be in his vest.

202
00:28:30,510 --> 00:28:35,600
They are from a different engine maybe, slightly 
bigger diameter, slightly shorter magnet.

203
00:28:35,610 --> 00:28:46,100
But I am ... it's my opinion that this is 
what they are, magnetic chip detector, Rolls-Royce 
Avon.

204
00:28:46,110 --> 00:28:52,900
This particular one, you are basic Vickers 
VB3497 MCD plug.

205
00:28:52,910 --> 00:29:03,000
So, from the shop at jet city, thanks for 
watching.