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Author Topic: Next Generation CLG  (Read 723 times)
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Pappy
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« on: March 01, 2018, 02:54:55 PM »

For the 2018 flying season I’ve added a couple
of 15 inch span DIY CLGs to my fleet, which fit
in between my very high launching 12 inch BTV
gliders and my nicely gliding 17.5 inch Sidewinder
gliders. In the photo, the DIY CLG on the left has
about 85% the wing area and about 75% of the
weight of the Sidewinder CLG on the right.

- Pappy
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Next Generation CLG
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Sailaway
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« Reply #1 on: March 01, 2018, 04:03:45 PM »

Terrific Build. Congrats very well crafted.
What kind of DT is on your bigger Sidewinder ? RDT?
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flydean1
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« Reply #2 on: March 01, 2018, 05:14:24 PM »

Really interested in your side hook.  What are the advantages, and how did you develop this concept.  Your results prove they evidently work.
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Pappy
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« Reply #3 on: March 01, 2018, 08:37:03 PM »

Hi Sailaway,

Both gliders have DT timer and tracking transmitter
electronics. The electronics in the DIY CLG weigh in
at 1.99 gm; substantially lighter than the electronics
in the Sidewinder. A 1.1 gm Lipo battery powers the
electronics in both models, and is also part of the
nose weight.
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Pappy
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« Reply #4 on: March 01, 2018, 08:38:32 PM »

Hi Dean,

The motivation for mounting the catapult hook on the
side is to raise the hook closer to the glider’s vertical
CG location, compared to a hook on the bottom of
the fuselage. David Mills and several other competitors
are also using side-mounted hooks.
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ffkiwi
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« Reply #5 on: March 01, 2018, 09:02:09 PM »

Can you elaborate a bit more on the electronics and DT? Your quoted weights for these components are very encouraging...

 ChrisM
 'ffkiwi'
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Pappy
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« Reply #6 on: March 01, 2018, 11:34:22 PM »

Hi Chris,

The attached photo shows the installation of the
electronics. The battery compartment is in the
front of the nose on the left. The transmission
line that connects to the antenna is on the right.
The PCB, wiring, button and “muscle wire” DT
actuator plus the antenna weigh in at 1.99 gm.
The antenna wire is glued to the trailing edge
of the wing.

I have written two articles you may find helpful.
The details of the 0.35 gm DT actuator is discussed
in my article in Free Flight Quarterly issue 64,
published in July of 2017. The overall approach to
the integrated timer/tracker electronics is discussed
in my 2014 NFFS Symposium paper.
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Re: Next Generation CLG
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ffkiwi
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« Reply #7 on: March 02, 2018, 03:57:57 PM »

Hi Chris,

The attached photo shows the installation of the
electronics. The battery compartment is in the
front of the nose on the left. The transmission
line that connects to the antenna is on the right.
The PCB, wiring, button and “muscle wire” DT
actuator plus the antenna weigh in at 1.99 gm.
The antenna wire is glued to the trailing edge
of the wing

I have written two articles you may find helpful.
The details of the 0.35 gm DT actuator is discussed
in my article in Free Flight Quarterly issue 64,
published in July of 2017. The overall approach to
the integrated timer/tracker electronics is discussed
in my 2014 NFFS Symposium paper.


Thanks for the steer-I shall look up the two source articles you mentioned.

 ChrisM
'ffkiwi'
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