RysiuM

My Feedback: (1)

I need to confirm my configuration.

The plane is 23% Edge (about 11 lb).
Receiver - Hitec Slim.
Servos:
Two 5645 on ailerons (one on each),
Two 5625 on elevator (one on each),
One 5945 on rudder,
One 225MG on throttle.

Battery: 2500 LiPo (Duralite Silver) with 6V regulator (10A constant, 20A burst).

I'm not concerned about capacity or voltage - I'm sure battery can stay above 6V at it can handle 25A constant. The question is about Voltage regulator. 10A constant (20A short burst) - is it enough or will I can blow the regulator? I'm going to fly it wild (I may use all available torque for short time in example for snaps).

RysiuM

mglavin

My Feedback: (31)

Richard

A ten amp regulator will suffice for your intermittent use. Most find that a 5 amp regulator does the job. Are you sure your regulator will sustain 10amps? I know of one, maybe two regulators offered that are able to deliver 10A continuous. Is the regulator something you assembled? Heat sink? Linear or switching? Have you tested for NOISE

RysiuM

My Feedback: (1)

-- deleted - double post

RysiuM

My Feedback: (1)

If you believe what it says on the box - it is. This is MPI 6V regulator



ACC134 on [link=http://www.maxxprod.com/mpi/mpi-21.html]Maxx Products page[/link]

Key Features:
• When input is higher than 6V/5.4V, it will regulate output to 6V/5.4V,
• When input is less than 6V/5.4V, regulator is bypassed,
• Weight only 0.4 oz,
• Current: 10 Amp continuous, 20 Amp peak @7.2V input,
• Input Range: 4V -8.4V.

I use simple 7805 regulator circuit for ignition only - it can handle up to 2A (0.5A is the easy job). I wouldn't dare to put something like that as a key part of a thousand dollars plane.

The same 10A regulator (Mpi) I used on H9 Edge but this one had only 2 digital servos ond one coreless (just 3 hight torque). This is my first plane with all digital high torque servos so I don't know how much power total they will take.

Dave an I did a range check on H9 and Dave was surprised, that I got longer range that gas motors used to give.

RysiuM

mglavin

My Feedback: (31)

Richard

If you've had experience with the regulator and it works for you I'd suggest its a viable component for your needs.

However I find the claim for 10A continuous a reach and at what duty cycle does this regulator perform such? Even if the device is capable of half the rated continuous current load its all good IMO... There are many modelers running similar digital servo loads that can attest to the ability of a single regulator of similar design/size/looks working without issue.

All that said, the servos will only require high current demands in short variable intermittent gulps or transient spikes worst case. I'd suggest your model will demand around 6-8amps in extreme maneuvers with all the servos working simultaneously. Lastly, you’re simply not going to stall the servos in flight.

RysiuM

My Feedback: (1)

Thanks Michael,
I hope to show you my new toy soon.

That's why I brought such strong servos onboard I calculated the torque based on the surface deflection 30 degrees in 80mph flight.

The last question. Two years ago I heard that there were some issues with Hitec digital servos that were locking or just smoking in the flight. Chuck recommended to "work out" all new digital servos for an hour or two to find out if there is an issue wich each particular servo. I did that for my H9 Edge - I didn't have any issues tho.

I know Hitec did a lot of updates since then. So do I still "test" all my servos like that - these are brand new servos bought three weeks ago. I don't have servo tester so I would have to work my stick on a a radio for an hour - which I don't like much

Richard

mglavin

My Feedback: (31)

Rich

I break-in/burn-in all my stuff regardless of manufacturer or component. I think fifteen minutes is adequate. Some TX’s can perform this task for you, or there are several devices on the market that are reasonably priced ($40.00) that are used to set-up, test and service servos. FMA has a unit known a the Servo Lab, Hitec’s Programmer and there are others. If you’d like to borrow my programmer let me know.

There have been reports of problems over the years with Hitec Digitals. Generally the problems are contributed to the supporting installation of the servos, i.e., power distribution, poor quality servo connections, improper programming and or mechanical set-up and binding. And of course there have been some outright servo failures.

Hitec digitals will soft-reboot if the power supply degrades below voltage minimums, causing a hard-over during the reboot process. This has been realized by some modelers with inadequate or marginal power systems, long extensions, low battery condition and or models with electrical systems high electrical losses. Voltage degradation, specifically under load can be a problem.

Early Hitec digitals required a program update to allow them to operate with other OEM equipment that was able to drive the servos outside 900-2100us pulse-width. Current equipment is not a problem.