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Search: Posts Made By: ron_van_sommeren
Showing results 1 to 25 of 500
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Forum: Glow to Electric Conversions
02-20-2024, 07:27 AM
Replies: 5
Views: 837
Posted By ron_van_sommeren

/* Oops. Wrong planet. */

/* Oops. Wrong planet. */
Forum: Electric General Discussion
02-20-2024, 07:19 AM
Replies: 1
Views: 165
Posted By ron_van_sommeren

Plane mass and plane type are leading. This FAQ...

Plane mass and plane type are leading.
This FAQ will help you ask the right questions and understand techno-geek-speak answers...
Forum: Glow to Electric Conversions
02-12-2024, 02:18 PM
Replies: 5
Views: 837
Posted By ron_van_sommeren

For now: forget glow/gas↔e-motor equivalencies,...

For now: forget glow/gas↔e-motor equivalencies, those can set you off on the wrong track and will restrict your choices. E-motors are way more versatile.

A selection method by scirocco...
Forum: Electric General Discussion
01-10-2024, 01:40 PM
Replies: 3
Views: 364
Posted By ron_van_sommeren

Have you tried another motor, to rule that out as...

Have you tried another motor, to rule that out as the common issue?

Can you do the motor-as-generator test?
(Re)winding and building motors - RCG...
Forum: Electric General Discussion
01-02-2024, 02:22 PM
Replies: 3
Views: 705
Posted By ron_van_sommeren

It's because long battery wires create voltage...

It's because long battery wires create voltage spikes that are higher than battery voltage.
At same frequency as user selected Pulse Width Modulation...
Forum: Brushed/Brushless motors, speed controls, gear drives
12-31-2023, 07:24 AM
Replies: 2
Views: 558
Posted By ron_van_sommeren

More info is needed for debugging: Current at...

More info is needed for debugging:
Current at WOT (wide open throttle)
Same for RPM and battery voltage drop
Motor velocity konstant Kv (https://bavaria-direct.co.za/constants) (expressed in...
Forum: RC Scale Aircraft
11-29-2023, 05:48 PM
Replies: 2
Views: 828
Posted By ron_van_sommeren

Ramoser Varioprop...

Ramoser Varioprop (http://www.ramoser.de/home_e/varioprop_e/varioprop_e.html)

2, 3, 4, 5 blade adjustable pitch props
Righthanded or lefthanded
(note that CW/CCW and pusher/puller are not prop...
Forum: E-Flight Power Sources
11-29-2023, 05:41 PM
Replies: 1
Views: 1,775
Posted By ron_van_sommeren

NKON (https://eu.nkon.nl/) batteries, Nuenen...

NKON (https://eu.nkon.nl/) batteries, Nuenen (Vincent van Gogh), south-Nederland.

Vriendelijke groeten ;) Ron
Forum: RC Boats General Discussion
11-25-2023, 02:38 PM
Replies: 6
Views: 359
Posted By ron_van_sommeren

Zo kom ik nog eens ergens Bert :)

Zo kom ik nog eens ergens Bert :)
Forum: Brushed/Brushless motors, speed controls, gear drives
11-24-2023, 01:06 PM
Replies: 1
Views: 445
Posted By ron_van_sommeren

See i need help identifying electric motor. -...

See
i need help identifying electric motor. - post#2 (https://www.rcuniverse.com/forum/e-flight-power-sources-126/11709329-i-need-help-identifying-electric-motor.html#post12788535)


Prettig...
Forum: RC Boats General Discussion
11-24-2023, 10:36 AM
Replies: 6
Views: 359
Posted By ron_van_sommeren

Attachments working fine here. ...

Attachments working fine here.

https://cimg6.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/600x502/a1849592_53_image001_ef46c7996511c650926bd727f7aa22720a7a6be6.jpg
...
Forum: E-Flight Power Sources
11-24-2023, 10:26 AM
Replies: 1
Views: 305
Posted By ron_van_sommeren

Without a watt-meter you're in the dark ... until...

Without a watt-meter you're in the dark ... until something starts to glow.

Motor mass is a useful indicator for a motor's power rating.
Conservative rule of thumb for max. continuous motor...
Forum: Electric RC Jets
11-23-2023, 02:51 PM
Replies: 11
Views: 915
Posted By ron_van_sommeren

Note that motor current drawn is proportional to...

Note that motor current drawn is proportional to voltage squared.
Going from 3s to 4s, current drawn wants to increase by factor (4/3)²=1.7, 70% higher.
Ignoring increase in voltage losses in...
Forum: Electric RC Jets
11-02-2023, 10:15 AM
Replies: 2
Views: 566
Posted By ron_van_sommeren

Note that a motor does not behave like a simple...

Note that a motor does not behave like a simple resistor, in that current drawn is not proportional to voltage but proportional to voltage² 22735402273540
It is a far from a linear effect, resulting...
Forum: Ask the Expert Sal - Electric Airplane Advice
10-10-2023, 03:58 PM
Replies: 2
Views: 2,634
Posted By ron_van_sommeren

Alas, you replied to a one time poster, from...

Alas, you replied to a one time poster, from 2017.

Vriendelijke groeten ;) Ron
Forum: Brushed/Brushless motors, speed controls, gear drives
09-30-2023, 08:38 AM
Replies: 6
Views: 1,978
Posted By ron_van_sommeren

Selecting power needed by plane type and mass...

Selecting power needed by plane type and mass works very well.

Below an excellent quote about motor selection and powersystem misconceptions
From
brushless motors Kv?...
Forum: Brushed/Brushless motors, speed controls, gear drives
09-21-2023, 03:23 AM
Replies: 6
Views: 1,978
Posted By ron_van_sommeren

IC-engines and e-motors have fundamentally...

IC-engines and e-motors have fundamentally different behaviour.
An ic-engine tries to keep a constant torque.
As a result, as propeller load goes up, rpm must go down.

An e-motor tries to keep a...
Forum: RC Jets
09-21-2023, 03:05 AM
Replies: 13
Views: 5,051
Posted By ron_van_sommeren

https://www.youtube.com/shorts/1tMx_H8sDVM ...

https://www.youtube.com/shorts/1tMx_H8sDVM

https://www.youtube.com/watch?v=r1M2Levi0mY

https://www.youtube.com/watch?v=wvkKDC90rh8

https://www.youtube.com/watch?v=1g_HzBGhqIE
Forum: Brushed/Brushless motors, speed controls, gear drives
09-08-2023, 05:24 PM
Replies: 6
Views: 1,978
Posted By ron_van_sommeren

Disclaimer: I know a thing or two about motors...

Disclaimer: I know a thing or two about motors but precious little about good plane/prop/rpm combinations.
Warning: I have a tendency to go overboard w.r.t. e-motor info :D Just say when.

Yes,...
Forum: Brushed/Brushless motors, speed controls, gear drives
09-08-2023, 06:09 AM
Replies: 6
Views: 1,978
Posted By ron_van_sommeren

RPM numbers can also be useful for...

RPM numbers can also be useful for troubleshooting.

A very long clearance sale, originally 200+$, versatile, high quality, now literally peanuts:
Hyperion Emeter II wattmeter with local&remote...
Forum: Electric Pattern Aircraft
08-08-2023, 10:30 AM
Replies: 12
Views: 2,510
Posted By ron_van_sommeren

The bigger the soldering iron (power, fast heat...

The bigger the soldering iron (power, fast heat replenishment) and chisel tip mass (heat storage) the better.
Soldering iron cannot be too big, +100watt.
A soldering gun is useless, and heavy to...
Forum: Electric Pattern Aircraft
08-08-2023, 10:30 AM
Replies: 12
Views: 2,510
Posted By ron_van_sommeren

Note that connectors don´t care about voltage (in...

Note that connectors don´t care about voltage (in volt) or power (in watt), they only care about current (in ampère).

On a side note, motors don't care about voltage either.
As long as current,...
Forum: Electric General Discussion
06-30-2023, 10:26 AM
Replies: 2
Views: 859
Posted By ron_van_sommeren

So the max.voltage depends on the prop: the...

So the max.voltage depends on the prop: the higher the prop load and/or on Kv (→higher current), the lower the max. operating voltage (→lower current).
Therefore: what prop would you want to use,...
Forum: Electric General Discussion
06-29-2023, 12:28 PM
Replies: 2
Views: 859
Posted By ron_van_sommeren

Motors, unlike ESCs!, can handle any voltage in...

Motors, unlike ESCs!, can handle any voltage in RC land, as long as current & power drawn and rpm don't get too high.
The wire insulation/laquer/resin can withstand several hundred volt.

So the...
Forum: Electric General Discussion
04-08-2023, 03:22 AM
Replies: 3
Views: 773
Posted By ron_van_sommeren

Timing may help alleviate your problem a bit but...

Timing may help alleviate your problem a bit but I don't think timing itself changes through axial play. Timing is a tangential effect, hence the (shaft)degrees. It's the e-motor analogy of ic-engine...
Showing results 1 to 25 of 500
 
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