The GeoLink manual recommends mounting at least 5cm away from rigid conductive parts. However the manual also shows examples of installations that appear to be only 2-3cm away from carbon fibre and aluminium booms. Are thin walled booms in close proximity acceptable, as opposed to thick walled structures?

Yes, you are right.
Thin walled parts are still fine.

_________________
Spirit System developer

ok thanks. Also, would mounting beneath the rear end of a glass fibre Goblin canopy be acceptable? The GeoLink would have visibility of the sky, but only clearly through a 6mm opening along the centre line of the canopy. I expect that this is not ideal, but would rather not mount the GeoLink a long way along the boom if possible. In other words, would there be sufficient GPS visibility of the sky if partially obscured by a thin glass fibre canopy?

It will still work for sure, but there will be performance impact. So it only depends on how much it will be visible and if it will be still acceptable for you.

_________________
Spirit System developer

Ok thanks. I'll try it and will move it back to a clear sky view if necessary. I'll soon have one installed on a different heli so will have something to compare in terms of performance. I expect that there will be no perceptible difference and will report back if this is not the case.

Is a thin paint layer an option, to blend in the Geolink cap to the body on a scale helicopter?

Do the running main blades influence the "line of sight" of the GPS sensor?

I have a hard time to find a spot on a scale body, that doesn't show the sensor.

Paint shouldn't be a problem if the cover has unchanged opening above the JST connector.
Rather no, because they are spinning constantly and are not shielding the signal too much.

_________________
Spirit System developer

So that means, the pink cover must see the sky, but can be painted in body color.
The signal does go through a thin paint layer.

Yes, it should be OK.

_________________
Spirit System developer

I wonder how geolink will behave on the carbon tail of protos 380
is pretty thick carbon ...