On 12/09/2013 04:22 PM, Linar Yusupov wrote:

I would like to present you PDF slides of one DIY R&D project.
The slides are about open platform airborne proximity warning device.
It operates at ISM band radio but also capable to receive ADS-B reports at aviation frequency.

I wonder how easily this device could be converted into one that can
transmit glider airspeed during a winch launch back to the winch driver?
It would require an extra hardware module with a pressure sensor to
measure pitot/static pressure, an analogue to digital converter, a USB
interface and additional software in the main radio unit.

You would need a 2nd radio device in the winch coupled with a suitable
display unit.

Dedicated devices for transmitting airspeed from glider to winch have
been made before, both on an experimental/development basis as well as
on a commercial basis. However every glider that gets winched from a
site needs the device to benefit from the technology.

The proposal describes a low cost anti collision device. If it could be
extended to provide winch launch airspeed feedback, it would provide an
additional function at an incremental cost. It might be attractive for a
club where the whole fleet is targeted for fitting of these devices, to
incorporate this additional functionality, if that club also operates a
winch.

Obviously this device is an alternative to Flarm. Adding this new
functionality might differentiate it enough from Flarm to create a niche
market.

Good luck with your project.

Ian