Ach jah, die kerel begon vlak nadat hij zijn bedrijfje opgericht had 2 jaar terug al te roepen dat hij "het beste product" van iedereen ging maken en verkopen. Allerlei claims, maar later blijkt de helft niet waar. Als basis gebruikt hij een standaard Xbeepro 2.4ghz module, niet eens zijn eigen ontwerp.
Ook hadden de eerste modules die uitkwamen een uitstulpinkje, dit was de antenne... nog geen maand later werden ze allen teruggeroepen en moest er een grote antenne op geschroefd worden. Wel dat hij al die tijd geroepen had dat zijn kleine antennetje net zo goed was als de grote van de concurrent!
Anyway, ik vertrouw die kerel niet, zijn bedrijf niet... en nu blijkt zijn spul ook al niet te vertrouwen. Wel jammer dat graupner er weer zo snel ingesprongen is... Ze hadden beter Spektrum kunnen blijven verkopen, maargoed het zal wel een reden hebben waarom dat niet kon.
Mjah:
XPS hopt dus niet... storing op jou frequentie = crash
Spektrum op T-rex 500 (alle ontvangers onder AR7000) hebben last van brownouts en linken langzaam, wat nu stilletje gefikst is. Storing op 2 frequenties = crash
Futaba = vooralsnog de beste optie, hebben alleen problemen met hun GUID gehad, word wel netjes opgelost. Hoppert de hele tijd de band af en alleen storing op een groot gedeelte van de band = crash
Ook interessant om te lezen:
The problem is that the XBeePro modules just aren't designed to be frequency agile once a link is established so nothing JD can do will change that -- the changes would have to come from MaxStream themselves.
If JD is a large enough customer and pays enough money I'm sure they'd look at changing the firmware - but that'd require all existing XPS units to be returned to base for a new XBeePro module to fix the hopping issue. Do you really think JD has the resources or the stomach for that? Hell, it seems to be hard enough to get Hobbico to admit what Robbe in Europe already has and recall the 6/7 ch FASST systems for an essential firmware/hardware upgrade.
In theory you can cobble together a jury-rigged attempt at hopping using the capabilities of the existing mdules (which is probably what JD has been trying to do) but it will only ever be a poor kludge of questionable functionality.
The limitations of the XBeePro module are also the reasons that JD has never offered (only promised) satellite receivers and why he's relied on hype about a "unique spherical radiation patern" on the XPS's single antenna. The bi-direction nature of the XBeePro systems means that you can't just hook two of them up side by side and have them effectively receive, process and acknowledge the same transmitter.
XPS is great for what it is -- a *really* simple (from an RC implementer's perspective) way to create an RC system for small models. It is not however, suitable for large or dangerous models due to the intrinsic weaknesses that have been oft-pointed out by those who know something about the technology and are now being independently verified.
I did a little research when I heard about this system, and it did not take long to see Jim Drew had a past history of making defective products, and hyping them like crazy, and then abandoning them.
What really strikes me as bad is how many people he got to hype his system, and how those people so viciously attacked anybody who questioned them.
I don't see a lot of apologies being said. Shame on you fellows. Shame on you.
Seems like a lot of people lost a lot of models, and pretty much all the time, they got blamed for it, it was never the fault of XPS. Watching that giant airliner crash was pretty awful.
Cheers,
Richard
