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Search: Posts Made By: ron_van_sommeren
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Replies: 4
Views: 272
Posted By ron_van_sommeren

Using a controller with a higher voltage and/or...

Using a controller with a higher voltage and/or current rating is not a problem.
That only carries a mass and size 'penalty'.

A controller does not 'force feed' the motor with current.
Only...
09-16-2022, 04:52 AM
Replies: 4
Views: 264
Posted By ron_van_sommeren

Better change your accountname before the...

Better change your accountname before the spammers find you.
Request for change in
www.rcuniverse.com/forum/forum-questions-problems-239...
09-15-2022, 01:03 AM
Replies: 4
Views: 264
Posted By ron_van_sommeren

Number of cells in series determines voltage,...

Number of cells in series determines voltage, voltage in turn determines rpm.rpm_noprop = voltage x Kv
So yes, that's the actual voltage needed.
Do not go for higher voltage, current drawn is...
Replies: 4
Views: 272
Posted By ron_van_sommeren

Another thing to take into account ... Power...

Another thing to take into account ...
Power system derating
It is a good practice to have some headroom built in. Motor runs cooler, slightly more efficient too, and you have some leeway should...
Replies: 4
Views: 272
Posted By ron_van_sommeren

Isn't that just he motor's maximum current...

Isn't that just he motor's maximum current rating? Or specifically an ESC rating advice?

Note that motors can handle any voltage, as long as rpm, actual current and actual power don't get too...
08-19-2022, 11:44 AM
Replies: 24
Views: 13,426
Posted By ron_van_sommeren

Same make as your club or your helper/trainer. ...

Same make as your club or your helper/trainer.
They know the user interface, they have spare parts.
08-17-2022, 03:38 PM
Replies: 45
Views: 17,420
Posted By ron_van_sommeren

The good news: cool looking plane. The bad...

The good news: cool looking plane.
The bad news: not suited for learning to fly.

You will crash it within 10 seconds, bigly. Sorry that I have to be so blunt, but I'm trying to protect the plane,...
07-15-2022, 11:15 AM
Replies: 4
Views: 423
Posted By ron_van_sommeren

What happens when you swap ESC with a servo...

What happens when you swap ESC with a servo channel Dwayne?
Does the problem move to other channel?

Prettig weekend ;) Ron
• Without a watt-meter...
07-14-2022, 05:14 PM
Replies: 4
Views: 423
Posted By ron_van_sommeren

That's a problem Dwayne, of the nasty kind...

That's a problem Dwayne, of the nasty kind because you want a problem to occur all the time, not sometimes.

Possible causes (not radio related) and solutions
Motor stuttering? Won't run? Read...
07-14-2022, 04:57 PM
Replies: 9
Views: 1,079
Posted By ron_van_sommeren

You really splashed out there :-) About...

You really splashed out there :-)

About measuring current, link opens a .pdf document
www.wattflyer.com/forums/attachment.php?attachmentid=117297...
06-29-2022, 04:57 PM
Replies: 8
Views: 583
Posted By ron_van_sommeren

RPM, current and power would be slightly higher...

RPM, current and power would be slightly higher because the copperwire resistance in the bigger motor is lower, which leads to lower voltage losses in the motor.

Efficiency of a bigger motor is...
06-27-2022, 03:20 PM
Replies: 3
Views: 452
Posted By ron_van_sommeren

That's a lovely plane/build, but ... ...

That's a lovely plane/build, but ...

Pleasepleaseplease, put it on a shelve, for now, and start with a dedicated trainer.
You will crash this one within five to ten seconds, that would be such a...
Replies: 2
Views: 491
Posted By ron_van_sommeren

You're welcome.

You're welcome.
Replies: 2
Views: 491
Posted By ron_van_sommeren

Probably a controller with an optocoupler...

Probably a controller with an optocoupler (https://en.wikipedia.org/wiki/Optocoupler) connection/interface.
Make, type, pictures?
03-29-2022, 08:59 AM
Replies: 9
Views: 1,079
Posted By ron_van_sommeren

Don't hesitate to ask questions. ...

Don't hesitate to ask questions.

Vriendelijke groeten ;) Ron
• Without a watt-meter (http://www.wattflyer.com/forums/attachment.php?attachmentid=117297) you're in the dark ... until something...
03-25-2022, 12:12 PM
Replies: 9
Views: 1,079
Posted By ron_van_sommeren

I know nothing about good plane/prop/rpm...

I know nothing about good plane/prop/rpm combinations, therefore cannot give you advice about powersystems.


Below an excellent quote about motor selection and powersystem misconceptions
From...
03-25-2022, 12:08 PM
Replies: 9
Views: 1,079
Posted By ron_van_sommeren

When you know power needed, and have decided upon...

When you know power needed, and have decided upon system voltage, you can calculate max.currentcurrent (in ampère) = power (in watt) / voltage (in volt).
.
It is a good practice to have some...
03-25-2022, 12:03 PM
Replies: 9
Views: 1,079
Posted By ron_van_sommeren

A very long clearance sale, originally 200+$,...

A very long clearance sale, originally 200+$, high quality, now literally peanuts:
Hyperion Emeter II wattmeter with local&remote logging, optical&electrical tach, servo tester - RCG...
Forum: RC Tanks
01-31-2022, 10:33 AM
Replies: 16
Views: 2,381
Posted By ron_van_sommeren

Factoring in the gearbox:Kv_geared = Kv_motor /...

Factoring in the gearbox:Kv_geared = Kv_motor / gear_ratio
Kt_geared = 1 / Kv_geared = Kt_motor × gear_ratio
1737
Vriendelijke groeten ;) Ron
• Without a watt-meter...
Forum: RC Tanks
01-29-2022, 07:49 AM
Replies: 16
Views: 2,381
Posted By ron_van_sommeren

Edit: oops, I replied in a 2020 thread 2271368 ...

Edit: oops, I replied in a 2020 thread 2271368

For max.torque you need to know a motor's max.current and its velocity konstant Kv (http://bavaria-direct.co.za/constants/#Kv).

The below goes for...
Replies: 2
Views: 1,204
Posted By ron_van_sommeren

To trust is good :) To calculate...

To trust is good :)

To calculate (http://www.rcgroups.com/forums/showthread.php?t=606703) is better :):)
Will get you to say within 10%, if input ok...
Replies: 0
Views: 647
Posted By ron_van_sommeren

Full version eCalc, free until Jan.4th.

From the eCalc (http://www.ecalc.ch) FAQ, suggestions and help thread at
eCalc: Q&A for propCalc, fanCalc, heliCalc, xcopterCalc - RCG...
11-28-2021, 10:34 AM
Replies: 2
Views: 887
Posted By ron_van_sommeren

To get you quickly up to speed, and to prevent...

To get you quickly up to speed, and to prevent easily preventable errors.

Some well-structured reading for rainy/windy days, including e-flight_101 & 102, and some handy e-tools.
Will save you,...
11-28-2021, 10:32 AM
Replies: 2
Views: 887
Posted By ron_van_sommeren

Your controller(s) situation is not yet clear to...

Your controller(s) situation is not yet clear to me, so bear with me:
Each brushless motor needs its own brushless controller and each controller/motor combination needs to be calibrated.
A brushed...
11-26-2021, 03:01 PM
Replies: 2
Views: 421
Posted By ron_van_sommeren

Battery is not up to the job it seems. Did you...

Battery is not up to the job it seems.
Did you measure battery voltage sag and battery current at wide open throttle Tom?
RPM is also handy for debugging.

Prettig weekend ;) Ron
• Without a...
Showing results 1 to 25 of 500
 


 
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