RCModelReviewsRe: Review: Turnigy 9X version v2 (FHSS).
by RCModelReviews » Sun Jul 18, 2011 7:13 am
I range and flight-tested the new Turnigy 9X FHSS module/receiver setup.
Range seems adequate. It was still working just fine at 650m (which is the length of space I had available to me today) and believe me, unless you're flying quarter-scale or very large gliders, it's very hard to see a model at that distance.
I did a comparison test between the Turnigy 9X V2 and the FrSky (using their parkflier receiver).
Both transmitters were placed 600mm (2 feet) above the ground. A transmitter held at normal waist height could be expected to deliver more range than was obtained in this simple test.
Both receivers were attached to some coreflute and I then drove to the far end of the sealed runway I use.
At 650m, both receivers were still functioning with the bind-lights solid.
The very interesting aspect was that, no matter which way I oriented the Turnigy 9X parkflier receiver, it would not lose the link but the FlySky would drop the link when the sleeved dipole was pointed directly at the transmitter (although the angle over which this occurred was very narrow.
When I lowered the receivers closer to the ground, theTurnigy 9X parkflier lost the link before the Turnigy 9X V2.
What does this prove?
The Turnigy 9X V2 is more sensitive than the Turnigy 9X parkflier (which is to be expected, since Turnigy 9X claim only 500m range for their tiny receiver).
Despite lower range, the Turnigy 9X receiver has no significant nulls in its antenna pattern, even at the extremes of range.
The Turnigy 9X V2 has nulls (as would be expected from a sleeved dipole) but these seem so narrow that it's unlikely you would notice their effect in normal flying at normal ranges.
I then flew the Turnigy 9X V2 receiver in an electric model to the limits of visibility and altitude. It showed good control the whole time. I even attached one of those little keyfob cameras to the model which I'd hoped would record the status of the bind light throughout the entire flight -- so I'd see if it went out at any stage. Unfortunately there was too much sun to see the bind light from some aspects but it certainly didn't look as if there was any signal loss.
Bottom line:
The Turnigy 9X receiver should be fine in any electric or glow/nitro sport model of average size. The lack of programmable failsafe means you won't want to use this receiver in a large/fast model but for all other applications I think it should work quite well.
I'll do some more testing on the interference rejection capabilities of the receiver this week and see how well it performs under heavy noise conditions.
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http://www.hobbyking.com/hobbyking/store/__12901__Hobby_King_2_4Ghz_Receiver_6Ch_V2.htm