Tag Archives: range check

ELRS … So The Commodore Was Correct ….!!

Our Commodore, Phil H, has long been very keen on the performance of his Radiomaster-ELRS receiver… “never dropped a signal”, he says.

Can you read that table above ? – it’s a tad blurry, but I think you can. These are ground-to- ground test results of some major transmitter-receiver brands aimed at the Radio Flying community, …who are interested in distances measured in kilometres..

The test might also typically be using receivers with a lot more channels than we use in sailing. The test person gets more into the transmitters, but receiver capability will be a big part of the equation.

You have to keep a sense of proportion – flyers seem to worry about ranges measured in kilometres, whereas, honestly, if our boats are 100m away I panic about whether I’ll hit a mark…. or not be able to tell which one of the pack is “me” !!

No need for us to be extremely picky about range and distance, but it’s all relative….

Sure enough, Phil – the major conclusion of the test is that ELRS is basically in a class of its own. FrSky Tandem was quite close (see our recent website article), but we don’t see many of those. You can see why the tests were controversial, but essentially they left the receivers in one spot then drove the transmitters into the distance (flattish undulating terrain) until they dropped signal. I think at one point they drive over a hill and see if the signal is regained the other side.

When you are dealing with radio sailing distances of 100 metres or so, if you have signal drops you probably need to check out other parts of the system. … Interesting though…. The full link of this 2024 video is given below – it’s long and much of it somewhat heavy going. If you skip forward to around the 1’17”, the summary and results start around there.

https://www.youtube.com/watch?v=LargnWPSX04

Spektrum Tittle Tattle….!!

So that we could write our Datchet radio sailing manuals for all the Transmitter Brands, I went ahead and sorted out trying them all.

In asking around, you get positive and negative opinions (passionate usually!) about all of them. When asking around about experience with Spektrum, more than once I was told that the kit had to be abandoned due to boats falling out of range. This was naturally accompanied by the views of others saying “used them for years, never had a single problem”…. (more passion!)

Of course, a boat can drop signal for all sorts of reasons – transmitter, receiver, carbon fibre, battery etc, but when your much respected friends say they had a problem you pay attention, don’t you? It might be the transmitter, it might not.

So I went ahead and bought a new Spektrum DX8e (on special offer, I might add!!). Before even hooking it up, I managed to break the thing – entirely my fault, by the way. So RW took it off to see the Spektrum doctor for me.

What was interesting was that RWs Model Shop (AL’s Hobbies) knew straight away after repair to give it a range check. I’m thinking they knew what to look for. They promptly sent it back to the distributor. It only took a couple of days to turn around.

The diagnosis was a faulty battery connector which had to be replaced. It was all so quick I’m thinking they had seen all this before a few times – a big batch problem maybe.

Anyway, if you have set aside your Spektrum after losing contact, it may all be to do with a suspect battery connector. You might want to get that looked at.

I’m grateful to Gary at AL’s Hobbies for sorting mine out 🙂