Demon Power Products RC Blog » Uncategorized

Hi Strength Sintered Rotors in Graupner Motors

Ori — Fri, 02 Apr 2010 20:34:37 +0000

We have just received a new model of Graupner Motors in 10.5 and 13.5 Turn variants. The reason for mentioning these motors is the build quality and extremely high strength rotors.

Most brushless rotors have a magnet strength between 1100 and 1300 gauss. However we have seen rotor strengths of up to 1600 gauss in recent GM Motors.

But 2 new Graupner motors have just arrived. The rotors in these brushless motors have a strength of 1800 gauss. The strength is so high that most people cannot turn the shafts of these motors. If you remember how strong some of the brushed motor magnets were then these are the same!. Incredible strength giving amazing braking power, when you slam the stick back. The quality is also very nice. Thick alloy can with quality material and soldering inside.

We have also tested these on a rev counter on the bench and give the same RPM figures of the lower gauss motors. Usually you will see a drop in RPM with the higher strength rotors but higher torque. These have everything.

Bottom line is that this kind of motor should develop high levels of torque, braking power and good speed.

Both variants are listed below.

10.5

13.5

Thanks for reading.

ESC common questions and what is the best

Ori — Fri, 19 Mar 2010 23:21:27 +0000

Recently a number of racers have asked what the best ESC’s are and what can be used for mod and stock racing. Below is what we consider to be the best available at present along with other questions answered.

1) GM 97168 120 Model
This ESC can be used for Mod and Stock racing. It has amazing punch (250 amp limit) and very good speed. It can be configured via the push button on the ESC with 9 profiles. However you can also program it via a USB cable which can be purchased separately. The software can be downloaded from the GM website. The programming software gives you maximum control over the ESC more than any other ESC on the market to date. Everything can be adjusted. This ESC has a built in heat sink with a fan also. Latest software firmware at time of writing this is 11.1.

2) GM 97164 90 Model
Same as above with slightly lower internal resistance with an amp limit of 200 as opposed to 250 as above. Hottest brushless wind can be 4.5T which is still a high end modified motor.

3) Tekin RS models – Pro model has a higher amp limit along with lower internal resistance.
Can be used for both mod and stock racing however the RS Pro can be used with the hotter winds! Limited programming functionality via the setup button on the ESC. However the Hotwire software can be downloaded and the purchase of the Hotwire USB unit will need to be purchased separately for more useful programming options. Not as many options can be programmed like the GM but the settings than can be changed are enough for 99% of racers out there. Criticised for having a lack of brakes at higher speeds, when the Turbo kicks in. But also this ESC has been highly praised for the amount of speed the motor develops. Extremely fast! This ESC has no heat sink visible and no fan. Very compact. Latest software firmware at time of writing is Vegas 203.

4) LRP 80910 SXX Stock Spec and Nosram 90910 Pearl Evolution Spec ESC (identical models bar the colour)
This ESC has been released recently however it was slightly tarnished with Version 1 and version 2 of the software installed to having slight issues. The latest incarnation has version 3 software which will be used for the life of this ESC.
No PC software is needed to program this ESC. Easily programmed with 2 buttons on the ESC. Bullet proof, with just main setting adjustments for drag brake, boost and feel. Everything else is automatic. Super smooth throttle response which delivers high RPM and excellent punch. Alot of racers love the simplicity of LRP ESC’s. This ESC has a built in heat sink and no fan. However a fan can be installed if you wish.

IC Clearance products

Ori — Fri, 01 Jan 2010 17:29:57 +0000

We have put a number of our IC products and other parts into our clearance section. Most IC products have been reduced by 50% which include Team Magic, K Factory, Mugen and more.

Please have a look.

VAT Increase but our prices stay the same!

Ori — Fri, 01 Jan 2010 00:06:27 +0000

VAT has been increased from 15% to the original TAX of 17.5%.

However even though you will now be paying the higher price of TAX, we have reduce out NET prices according so you pay the same price as before.

Get it while you can.

Bargain priced ESC Stock Spec

Ori — Wed, 23 Dec 2009 16:52:38 +0000

Used ESC here.

Nosran 90710 Matrix Evo Stock Spec Top end Brushless ESC Speedo

Demon DL5040 7.4V 5000mah 40C Lipo!

Ori — Mon, 08 Jun 2009 18:24:42 +0000

Our best LiPo yet

Click here for more info

Yum Yum – Demon Bacon

Ori — Thu, 19 Mar 2009 20:19:48 +0000

Some Demon Bacon anyone ?

Click here

Or maybe this is better for Vegetarian readers – Naughty Naughty I just could not help myself

New Nosram and LRP Speedos

Ori — Fri, 13 Mar 2009 18:31:10 +0000

New:

Nosram 90710 Matrix Evo Spec Racing Brushless Speed Control

LRP 80710 SPX Brushless LATEST Stock Spec Speed Control

If you have not heard the hype about these speed controllers then let us just tell you that they are both amazing for Stock racing as tested. Set them to profile number 8 and wow. They just keep winding up. Don’t be surprised if you get accused of cheating!

As far as we understand the timing of the motor increases as the revolutions of the rotor increase.

If their is an unfair advantage then these may just be it.

I just need to buy one myself now