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This shows the
start of the fabrication of the running stand, very basic
but it's all that is needed.
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Three engine
mounts from a ford fiesta are used to reduce any potential
vibration damage that may occur to the GTP70.
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At the moment two oddessy 12v battery's
are being used to run the engine, these may be removed
later and will possibly be replaced by a Q/R battery connector,
thus avoiding dedicated battery's for every engine. The isolation
switch and starting solenoid can also be seen in the picture.
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I want as many of the features of
the engine remotely connected to the control panel, to
do this a sub junction box has been installed and all of
the wires of the engine end up being connected
to a 38 way multi pole connector. |
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Ian & Paul Bennett came for a day
out and we a had a group effort in getting the GTP70
to run. The sun was
out and the radio was on loud! Sad I know but it was
a fun day. In the picture shown is the temporary control
panel that we made, at this point we had no idea if the
engine would run, nervous times.
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This picture was taken at the very
first full run test, all seems to be going very well. |
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Success! It works and everything,
a celebratory handshake at the end of it all. The first
running videos can be seen on the GTP70
Media Page.
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The FOD guard was made using aluminium
strip and expanded steel mesh. They were glued to together
using PU adhesive, I'm stuck on what threads are used to
secure the guard to the engine, its seems that Garrett
have used an odd thread?
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Now that I know the engine runs,
it's time to make a proper control panel. For ease of
availability I am going to use
standard 2U audio style rack mount case, the controls
will be fitted in to an appropriate 2U blanking plate
as shown.
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The multi core cable that runs from
the engine enters the flight case via an intermediate box,
this keeps the cable neat and tidy and close to the box. |
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This shows the inside of the control
box, pretty basic as they come, this is due to the GTP70
having most of the
control electronics integrated in to it's own system, I
just hope that they don't go wrong, because replacing
them could well be a problem.
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There we go, finished. From the
left.
Tacho, EGT, Oil Temp, Start & Stop Switch's, Starter
Engage Indicator, 100% RPM Trim Switch and lastly Power
Switch and Indicator. |
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3/8" Quick Release fitting mounted
for the fuel inlet along with a Lucas CAV type fuel filter. |
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After the withdrawal of the Gazelle
airframe and no longer having a use for the engine, it
now seem's the GTP70 will finally have a purpose.
Click Here to find out.
Or not as the case may be! 14/02/2010 |
MGF
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