On Sat, 02 Jan 2021 19:45:37 +0000, Jan Panteltje wrote:

> On a sunny day (Sat, 2 Jan 2021 18:05:23 -0000 (UTC)) it happened Martin
>>No license is needed for free flight if the model weighs less than 250g.
>
> I think it is: "Unless it has a camera" (most of those do however).
>
Nope. I've never even heard of cameras on Free flight. They're just
irrelevant because by definition the only control possible on a free
flight model is an RDT: the whole point is that the model can't be
controlled after launch because what a contest is about is the art of
launching into lift and of designing/building trimming the model so it ca
self-centre in the lift patch it was launched into. Scoring is simple: at
the end of a competition the winner is the person with the highest total
flight time.

RDT = radio dethermaliser - pushing the button is an irreversable action
that overrides the onboard timer forcing it to end the flight.

We do carry reverse links though (radio trackers to aid retrieval after a
flight and some carry a GPS which modulates the tracker to send location
information back to the model's flyer. Like the tracker, this just makes
retrieval easier after the flight.

Seems like you might never have seen a free flight model. Look here:
https://www.gregorie.org/freeflight/index.html

and there'a bit on the Koster timer here:
https://www.gregorie.org/freeflight/timers/personal.html


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Martin    | martin at
Gregorie  | gregorie dot org

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