Regulator voltage under load?

[J-S-Q]

Cant go wrong with the Flightech reg at £25.

Wouldnt trust the 2in1 as far as I could throw it.

Got a link to that one Paul? Is it this one?

Fast Lad Performance

[alex]

Really interesting info there-are you FLybarred or FBL- I know it makes no difference on the bench, but voltage drops like that will matter in the air and FBL can be a lot more power hungry. I have the ALign 2 in 1 on both my 90s and anecdotally I can notice a voltage drop if I do aggressive cyclic inputs when the battery is down to one green- I am still not sure if this is down to the battery not being able to keep up or if it is the regulator- I will know once I fit the ElyQ reg I have to one of my helis.

There was a post a while ago working out the current draw by full size servos and I seem to remember it was very marginal as to whether the the Align 2in1 could cope based on those calculations.

I assume all your servos are moving freely and not binding on the linkages at all. What heli is this on?

[J-S-Q]

This is on a flybarless (Beast X) 700N with Align DS610's and there's no binding anywhere. Yes, I've seen posts about the 2-in-1 being a bit underspec-ed as well although I've never actually had a problem with them in flight but perhaps I've been living a bit dangerously. I definitely will compare the other 2-in-1 that I have in my spares box and see if it's any different and will post the results here. Just for the record, prior to installing this telemetry, I've had 70-80 flights with this setup (about half of those still with the flybar) and no problems at all.

Incidentally I'm using a freshly charged Turnigy Nanotech 2,650mAh 25-50C 2s Lipo which is fairly new so I can't see this being related to a weak battery (I tried two different batteries any way).

[alex]

You have the same set up as me on my 700N pretty much. The DS610s are power hungry and personally I think it is borderline for coping, though it seems a bit unpredictable as to when it happens so at present I am very un evidence based! I suppose I will get a subjective idea if I change to the ElyQ

Thinking about it, the problem I have seen seems to happen towards the end of a 10 minute flight rather than the battery charge- thinking now....................

[Allen Key]

Could you give me the part number for the flightech reg would,nt mind having a look at the specs

Dave

[sacko]

Got a link to that one Paul? Is it this one?

Fast Lad Performance

Thats the one

[jamiem]

2in1's on FBL are an accident waiting to happen if you ask me. I too use the flightech, and after the flight the telemetry shows max min of 6.1 and 5.9v, so I'm happy it's doing it's job properly.

If its fluctuating that much, clearly it's not actually regulating properly within even its own design limits, as on the bench with no flight loads on the servos, they will never be pulling 6A or more. Bin it and get a decent reg!

[J-S-Q]

I just tried my spare 2-in-1 and the voltage drops even more -on one occasion the telemetry showed a low of 3.6v! Of course there's always the possibility that the telemetry is inaccurate or even that there is another issue somewhere in my electronics. All the green lights remained lit while I was moving the sticks and again, the battery was freshly charged.

[alex]

2in1's on FBL are an accident waiting to happen if you ask me. I too use the flightech, and after the flight the telemetry shows max min of 6.1 and 5.9v, so I'm happy it's doing it's job properly.

If its fluctuating that much, clearly it's not actually regulating properly within even its own design limits, as on the bench with no flight loads on the servos, they will never be pulling 6A or more. Bin it and get a decent reg!

I know it is good advice and even have the new reg at home, I jsut have to get my arsse into gear now!!!!!

[J-S-Q]

Just to add further confusion to this issue... If I apply pressure to all 3 cyclic bellcranks so that the servos are stalled (as opposed to moving the collective up and down rapidly), I only see the voltage drop by about 0.2v which is really not much of a worry. If I stall all three servos in this way, shouldn't this be pretty much the maximum current draw? It's making me question whether the telemetry is giving accurate information in my previous tests, as if it's somehow confused by the rapid movement of collective.

In this video review of the 'Perfect CCPM Regulator' (supposedly a quality unit), the voltage drops by a similar amount with the same kind of 'stall' test:
http://video.helifreak.com/?subpath=...ectccpmreg.wmv

[sacko]

Stick a voltmeter on it.

[pgkevet]

A simple test. When I had my FB and 2:1 it averaged 350ma returned to the pack per tank on the 600N. FBL that shot up to 800-850ma per tank..obviously the same flying style (sadly more limited than I'd wish for).
Call it a 10min tank and you're at 2.1ah FB and around 5ah FB..with losses through regulation you can easily see that FBL is pushing the limits of the 2:1 specs..if it's pulling 5A average then it's got to be pulling way more at peaks

[trillian]

A simple test. When I had my FB and 2:1 it averaged 350ma returned to the pack per tank on the 600N. FBL that shot up to 800-850ma per tank..obviously the same flying style (sadly more limited than I'd wish for).
Call it a 10min tank and you're at 2.1ah FB and around 5ah FB..with losses through regulation you can easily see that FBL is pushing the limits of the 2:1 specs..if it's pulling 5A average then it's got to be pulling way more at peaks

'Just to add, I have been told that the standard JR connectors are potential bottlenecks as they are only rated at 3 amps. So if you're needing 5 amps continuously you'd need two JR connectors to the RX (or an RX with deans or bullets etc.)

[cupracing]

'Just to add, I have been told that the standard JR connectors are potential bottlenecks as they are only rated at 3 amps. So if you're needing 5 amps continuously you'd need two JR connectors to the RX (or an RX with deans or bullets etc.)

thats interesting Sheryl. I have a bec pro with two outputs, I assume this is the reason. Only issue is I havent an extra slot on my vbar, I guess a Y harness wont help either as it still merges into one connector. So whats the solution?

[trillian]

thats interesting Sheryl. I have a bec pro with two outputs, I assume this is the reason. Only issue is I havent an extra slot on my vbar, I guess a Y harness wont help either as it still merges into one connector. So whats the solution?

Hmmm, I would expect the Vbar to have been designed knowing very well the loads involved, so if it has a single power connector it should be capable. Reading back through some stuff I was sent some time ago, at the time I was concerned about a Spektrum RX dipping into brown-out voltage and a company that makes power stuff for big planes said the standard JR connectors cause a drop of .3 volts at 3 amps. Another source said the JR connectors are good for 3.5 amps. But maybe they can handle more than that.