Search: Posts Made By: ron_van_sommeren
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Forum: Power Systems
01-23-2021, 07:54 PM
Replies: 7
Views: 93
Posted By ron_van_sommeren

The controller is trying to tell you something in...

The controller is trying to tell you something in beep/morse code, using the motor as a poor loudspeaker.
Look up or google (make/type manual/instructions beep code) the code, several codes.

In...
Replies: 2
Views: 89
Posted By ron_van_sommeren

Even if you still measure a voltage, Tx and Rx...

Even if you still measure a voltage, Tx and Rx batteries are shot after five years.
Forum: Beginners
01-17-2021, 10:09 PM
Replies: 4
Views: 222
Posted By ron_van_sommeren

C-ratings, discharge rates, stickertuning and...

C-ratings, discharge rates, stickertuning and other blatant lies. Using uniform tests, getting published/reffered in opening posts:
Battery Load Test Comparisons - RCG...
01-13-2021, 02:58 PM
Replies: 5
Views: 245
Posted By ron_van_sommeren

One for northern hemisphere, the other for...

One for northern hemisphere, the other for southern hemispere? Whatever they are, navigation tools?
Forum: Beginners
01-12-2021, 11:56 AM
Replies: 3
Views: 263
Posted By ron_van_sommeren

Some well-structured reading for rainy/windy...

Some well-structured reading for rainy/windy days, so you know what we are talking about.
Including e-flight_101 & 102, and some handy e-tools. Will save you, and us :D a lot of questions. Notably...
Forum: Beginners
01-12-2021, 11:51 AM
Replies: 3
Views: 263
Posted By ron_van_sommeren

Below an excellent quote about motor selection. ...

Below an excellent quote about motor selection.
From
brushless motors Kv? - RCG ('https://www.rcgroups.com/forums/showthread.php?2083459-brushless-motors-kv')
01-09-2021, 05:18 AM
Replies: 22
Views: 567
Posted By ron_van_sommeren

Increase in current with one or two cells added,...

Increase in current with one or two cells added, simple table - RCG (https://www.rcgroups.com/forums/showthread.php?2475738-Increase-in-current-with-one-or-two-cells-added-simple-table)

The 'full'...
01-09-2021, 04:58 AM
Replies: 22
Views: 567
Posted By ron_van_sommeren

'We' 'rape' batteries: much high(er) charge and...

'We' 'rape' batteries: much high(er) charge and discharge currents, deep discharge, deep landings a.k.a. crashes.
'We' also make mistakes setting charge current, setting battery type (different...
01-06-2021, 01:38 PM
Replies: 6
Views: 454
Posted By ron_van_sommeren

/* Oops. Wrong planet. */

/* Oops. Wrong planet. */
01-06-2021, 01:14 PM
Replies: 6
Views: 454
Posted By ron_van_sommeren

I know Greg Kamysz...

I know Greg Kamysz (https://www.rcgroups.com/forums/member.php?u=746) did a similar RC motor project for a lathe or a mill but I can't find his homepage anymore. Maybe contact him via RCG...
01-06-2021, 12:57 PM
Replies: 6
Views: 454
Posted By ron_van_sommeren

Dave, note that the max.torque of the lower Kv...

Dave, note that the max.torque of the lower Kv version of same motortype is not higher, max.torque does not change with Kv (because #ampère⋅windings cannot change).

However, Kt, torque for given...
01-06-2021, 12:28 PM
Replies: 22
Views: 567
Posted By ron_van_sommeren

The LVC in your motorcontroller protects your...

The LVC in your motorcontroller protects your flight battery from getting ruined. Although it's a safe practice to stop a bit before the has to LVC kick in.

Some well-structured reading for...
12-23-2020, 05:54 PM
Replies: 3
Views: 164
Posted By ron_van_sommeren

Charger max. power is another limit that has to...

Charger max. power is another limit that has to be taken into account.Max_charger_current =
charger_max_power / pack_voltage
minus
some_losses_here_and_there_say_10%..
This current can be lower...
12-12-2020, 01:14 PM
Replies: 11
Views: 1,324
Posted By ron_van_sommeren

Don't worry, you did not miss a thing, I meant...

Don't worry, you did not miss a thing, I meant one motor on leading edge of the right wing, and the other motor on the left wing.


On a less serious note, another solution ;)
www.torcman.de
→...
12-11-2020, 11:39 AM
Replies: 11
Views: 1,324
Posted By ron_van_sommeren

Two motors on the leading edges of the wings? ...

Two motors on the leading edges of the wings?
Trace a rib, add sheeting thickness, to get inside 'pod' contour.
You would need two brushless controllers when using brushless motors.
Forum: Beginners
12-06-2020, 11:49 PM
Replies: 8
Views: 2,382
Posted By ron_van_sommeren

Current and power drawn are proportional to pitch...

Current and power drawn are proportional to pitch and to diameter⁴ :eek::eek::eek::eek:
Going from 13×8 to 14×6, current and power change by factor (6/8)=0.74 and again by factor (14/13)⁴=1.34,...
10-20-2020, 12:10 AM
Replies: 4
Views: 1,701
Posted By ron_van_sommeren

Current and power drawn are proportional to...

Current and power drawn are proportional to voltage squared respectively voltage cubed.
Going from 12s to 14s, current drawn wants to increase by factor (14/12)²= 1.3, 30% extra.
Power drawn wants...
Forum: Power Systems
09-18-2020, 12:39 PM
Replies: 8
Views: 2,021
Posted By ron_van_sommeren

(UBEC is just a propriatery brand name, zero...

(UBEC is just a propriatery brand name, zero information in it, I prefer LBEC (linear) and switching SBEC (switching), gives more info.)

Don't use a linear LBEC above 3s.
The higher the...
Forum: Power Systems
09-18-2020, 12:38 PM
Replies: 8
Views: 2,021
Posted By ron_van_sommeren

Don't forget to remove the red pin from one of...

Don't forget to remove the red pin from one of your ESC connectors. Otherwise you get two (slightly) different voltages, linear lbec and battery, or lbec and lbec, fighting each other. Or in the case...
Forum: Humor
09-09-2020, 08:51 PM
Replies: 4
Views: 1,566
Posted By ron_van_sommeren

I have a similar story myself, from many moons...

I have a similar story myself, from many moons ago, about using Veet chemical depilatory instead of shaving, in/on a slightly different, more forward location, the day before my birthday. I will not...
Forum: Humor
09-08-2020, 05:33 PM
Replies: 4
Views: 1,566
Posted By ron_van_sommeren

About shaving your ass hair.

From Reddit.

Before shaving your ass hair, READ THIS STOP! Before you do, read this. You may change your mind. I have recently made a mistake in my life, and I offer my story to all though...
09-04-2020, 02:38 PM
Replies: 2
Views: 2,014
Posted By ron_van_sommeren

You and I should post more :) Prettig weekend.

You and I should post more :)
Prettig weekend.
Forum: Humor
08-25-2020, 02:14 PM
Replies: 1
Views: 349
Posted By ron_van_sommeren

Thanks Don, another sleepless night of tossing...

Thanks Don, another sleepless night of tossing and turning in my bed :D
Forum: Beginners
08-17-2020, 12:05 PM
Replies: 8
Views: 2,382
Posted By ron_van_sommeren

It is a good practice to have some headroom built...

It is a good practice to have some headroom built in.
About derating motors, controllers, batteries, electronics in general:


Derating, starting at ... Then there is the 75% rule of thumb ......
Forum: Beginners
08-17-2020, 11:54 AM
Replies: 8
Views: 2,382
Posted By ron_van_sommeren

Both current and power drawn are proportional to...

Both current and power drawn are proportional to diameter⁴ (http://mh-aerotools.de/airfoils/propuls2.htm#MultibladeSelection), here they would increase by factor (14/13)⁴=1.35, 35%more.
(Ignoring...
08-14-2020, 07:27 PM
Replies: 8
Views: 2,954
Posted By ron_van_sommeren

Of course Dave, by all means, go ahead. And thank...

Of course Dave, by all means, go ahead. And thank you :)
08-14-2020, 12:51 PM
Replies: 8
Views: 2,954
Posted By ron_van_sommeren

Training/trainer suggestions: Advice for...

Training/trainer suggestions:
Advice for getting into flying RC airplanes, and how not to - The Ampeer (http://www.theampeer.org/Begin-RC/Begin-RC.htm)

Some well-structured reading for...
08-04-2020, 02:08 AM
Replies: 3
Views: 2,788
Posted By ron_van_sommeren

And don't forget to list battery voltage as well....

And don't forget to list battery voltage as well.

To give you a rough idea, current drawn is proportional to pitch, #blades and diameter⁴ :eek::eek::eek::eek:
Current is also proportional to...
07-27-2020, 05:24 PM
Replies: 0
Views: 2,307
Posted By ron_van_sommeren

DreamLab app, your smartphone computing against corona and cancer while you sleep.

Only does calculations whilst on charger.
Not only for Vodafone, and also for WiFi.
More info
Coronavirus research app vodafone dreamlab - Evening Standard...
Forum: Beginners
07-25-2020, 01:59 AM
Replies: 3
Views: 2,221
Posted By ron_van_sommeren

Good point about the balancing current, +1. ...

Good point about the balancing current, +1.

Another good point, this time by me ;)
Warm pack to 40°C/100°F for about one hour (through and through), for best performance and longest life.

Some...
Showing results 1 to 30 of 500
 


 
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