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CustomCDR Hot and Cool Wind Single Billet Bullet Brushless Motors Review
Ronnie Pope and Mike Llewellyn take a look at the Single stator CustomCDR Motors. Included in this review are the Billet Bullet Hot and Cool Wind Brushless Motors.
Introduction
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| Billet Bullet ’’Hot Wind’’ Single | |
| Specifications: | |
| Weight: | Weight- 20-24 grams (depending on options) |
| Max AMPs: | 10 AMP |
| Propeller: | 7x3.5 GWS HD on 3s |
| Propeller: | 8x4 GWS HD on 2s |
| Thrust: | 15-22oz |
| Pitch Speed: | 50-70 mph |
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| Billet Bullet ’’Cool Wind" Single | |
| Specifications: | |
| Weight: | Weight- 20-24 grams (depending on options) |
| Max AMPs: | 10 AMP |
| Propeller: | 8x4 GWS HD on 3s |
| Propeller: | 9x5 GWS HD on 2s |
| Thrust: | 15-19oz |
| Pitch Speed: | 30-40 mph |
| ESC: | Castle Phoenix 10 and Thunderbird 18 |
The CustomCDR 'Cool Wind' Single with available "wobbly" prop adapter |
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| US distributor: | CustomCDR |
| Available From: | CustomCDR |
CustomCDR has two brushless sub-ounce motors that have really brought our smaller ships to life.
Although these motors are very small and light they do not lack power. We could not wait to get them mounted and flying! Lets take a look at these great little powerhouses.
Motors Include:
- Motor
- Custom firewall mount
- Beautifully machined endbells
- Anodized finished
Motors require:
- 10 AMP Brushless ESC
- Propeller
- 2s-3s LiPoly battery
- Mounting screws
- Propeller Collet/adapter
Connection to ESC
Deans makes a micro-size 3-pin unpolarized connector that works wonderfully for this purpose. Unfortunately, the 3-pin unpolarized connectors have recently been hard to find so we used the 4-pin polarized connector with the last offset pin removed.
Mounting
Both motors include a high quality integrated firewall mount that has three legs that extend beyond the motor bell. The engines accept small servo-type mounting screws to mount to the firewall, but they can also be ordered with a tube type mount.
Ronnie's thoughts on the CustomCDR 'Hot Wind' Single motor: The motor is small and very light. This is important for the A-7 pusher jet, which needs a light motor to achieve the proper CG. I highly recommended it for this application.
Mike's thoughts on the CustomCDR 'Cool Wind' Single motor: This motor is an excellent choice for park flyers that swing 7" to 9" props. It worked well for the Mini Sport.
Amp draws
RCGroups member Dr Kiwi tested both of the motors on a 3s pack with the following results (posted with his permission - thanks Dr. Kiwi!):
| Billet Bullet ‘Hot Wind’ Single | |||||
| APC E Props | Volts | Amps | Watts | RPM | Pitch Speed(mph) |
| 4.2x4 | 10.9 | 3.65 | 40 | 16170 | 61.3 |
| 4.5x4.1 | 10.7 | 4.45 | 47 | 15450 | 60 |
| 5.25x6.25 | 10.9 | 10.1 | 110 | 13530 | 80.1 |
| Zagi 5.1x4.9 | 10.9 | 7.05 | 77 | 14850 | 68.9 |
| Billet Bullet ‘Cool Wind’ Single | |||||
| GWS HD Props | Volts | Amps | Watts | RPM | Pitch Speed(mph) |
| 7x3.5 | 10.9 | 4.9 | 54 | 12240 | 40.6 |
| 8x4 | 10.9 | 9.4 | 101 | 10020 | 38.0 |
| 9x5 | 9.9 | 10.55 | 104 | 7410 | 35.1 |
As shown in the numbers above, these are both very strong little motors. The bearings are smooth and the cogging is very strong on both motors making it clear that high quality curved magnets are used and that the stator to magnet gap is very small. The machining and anodizing work are excellent.
The Castle Thunderbird controllers used with these motors started them without stuttering or hesitation. For more information on the Castle ESCs please see Castle.
Weight
Total weight of each motor not including the prop adapter is just .85 oz.
’Hot Wind’
Since the ‘Hot Wind’ motor is really for faster ships, we installed it on a pusher type jet: a semi-scale A-7 Corsair designed by friend and fellow flier Doug Cohen.
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Test aircraft number one – A-7 Corsair pusher plane with the CustomCDR 'Hot Wind' Single motor
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The 'Hot Wind' Single looks great on the Corsair
The A-7 with the 3S 1320 DualSky pack weighed in at 13.8 oz. I used an APC-E 4.5x4.1 prop on this plane. The CustomCDR 'Hot Wind' single proved to be the perfect power plant for the A-7. It's easy to mount, extremely lightweight and has significant power for it's size. The A-7 Corsair has a broad speed envelope and the 'Hot Wind' Single performed flawlessly at all speeds.
’Cool Wind’
For the ‘Cool Wind’ motor we selected the Herr Mini-Sport airplane. This 36” span plane tips the scales at 12 oz. with a 3s 350Mah Tanic pack. Since we were trying to keep the amp draw at around 5 amps to accommodate the 15C pack, the the GWS 7x3.5 HD prop was chosen for this aircraft. As the video illustrates, The ‘Cool Wind’ motor provides plenty of power for this small airplane.
The ‘Cool Wind’ motor and the Herr Mini-Sport make an excellent combination. Even though the motor is capable of nearly twice the power, I used the 7x3.5 propeller to be kind to the smaller cells used with the Mini-Sport. The 5amp draw and GWS HD 7x3.5 propeller still give this airplane more power than it needs. It has enough power for continuous loops and great rolls.
The ‘Cool Wind’ motor would also make an excellent choice for small 3D ships. The bearings are of a high quality - something missing in a number of the overseas motors that we have seen on the market recently.
Flight Video
Downloads
Downloads
As you can see, these tiny motors don’t lack power. The A-7 is propped for 10 amps and the Herr Mini-Sport is propped for about 5 amps, yet the power is significant!
Conclusion
The single stator Hot and Cool wind motors are winners. The Billet Bullets are indeed bullets! The motors performed flawlessly both in the static amp-draw tests and where it matters... in the air. Even with the included 3 screw firewall built-in mounts, they are amazingly light.
Plusses:
- Excellent looks
- High quality, precision handmade
- Hand wound to order
- Super light
- Very powerful
Minuses:
- None that we can think of!
These are very impressive and light power plants. We were both happy with the quality and the power these little monsters put out. For more information, go to CustomCDR.com and order your own CustomCDR Billet Bullet single motor today!
Last edited by AMCross; Mar 15, 2007 at 08:44 PM..Discussion
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Apr 25, 2007, 12:44 PM
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Chattanooga, Tennessee, United States
Joined May 2003
26,279 Posts
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Just a point of correction - that 7.9A draw for the "Hot Wind" with a 4.5x4.1 can't be correct. I got:
10.7v, 4.45A, 47W, 15450rpm, 60.0mph Phil |
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Last edited by Dr Kiwi; Apr 25, 2007 at 01:04 PM.
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Apr 25, 2007, 01:34 PM
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Ft. Worth, Texas
Joined Jan 2004
2,430 Posts
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Phil,
Thanks very much, the test data for the 'hot wind' has been corrected and you have our sincere thanks for the use of your test data  Ronnie |
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Last edited by dawnron1; Apr 25, 2007 at 01:42 PM.
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Apr 25, 2007, 03:38 PM
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Cracow, Poland
Joined Nov 2003
622 Posts
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When there will be some NEGATIVE reviews on the E-Zone?
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Apr 25, 2007, 04:26 PM
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Simpsonville, SC
Joined Aug 2005
121 Posts
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Nice little review. I love my CDR Hot Single on a Micro Jet setup light with a Zagi carbon prop. You can build ultra light with that motor, TB9 ESC and small lipos. Makes the MJ a real floater and a cinch to launch and land but with enough speed to still make it fun to fly. I have a CDR Cool Double thats been around for a long time that I still use quite a bit as well.
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Apr 25, 2007, 10:40 PM
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United States, MN, Mankato
Joined Jul 2003
7,190 Posts
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Quote:
Well I can't fault this review as these motors really are great. They are my workhorse for all types of planes. Steve |
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Latest blog entry: WATTS over Owatonna
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Apr 25, 2007, 11:11 PM
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USA, CA, Fremont
Joined Sep 2004
3,671 Posts
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From what I can tell, they only bother to put the good stuff into an article. In E-Zone...no news is BAD news!
- Jim |
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Apr 25, 2007, 11:13 PM
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Brisbane
Joined Nov 2005
2,213 Posts
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Quote:
My friend tried to get me to part with one but I said no. I really like them in pushers as they are really light for the power they provide. |
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Apr 26, 2007, 07:53 AM
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USA, TX, Trophy Club
Joined May 2002
12,970 Posts
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Quote:
But I can tell you - these little motors are fantastic - super for use where light weight is key - yet you can pump 10 amps through them.... I have the red hot single in a HL Lynx right now - I can tell you with the 5.25x6.25 prop and a tad over 10amps and it goes like stink! Nothing negative about these little motors they are fantastic! Mike |
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Apr 26, 2007, 07:59 AM
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Sonoma County
Joined Sep 2004
12,987 Posts
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From what I can tell, they only bother to put the good stuff into an article. In E-Zone...no news is BAD news!
When there will be some NEGATIVE reviews on the E-Zone? That is what is nice about RCG and these forums ... if YOU disagree with something you read and your experiences are otherwise, you are free to post it for all of us to see and discuss as mature adults.
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Apr 26, 2007, 01:26 PM
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Ft. Worth, Texas
Joined Jan 2004
2,430 Posts
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Well said, Jon!
Thanks guys, as Steve, Mike and others have said, these little motors perfrom amazingly well for their size and weight! Ronnie |
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Apr 26, 2007, 02:47 PM
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Antony (France)
Joined Sep 2003
2,596 Posts
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Quote:
I am ready to test them to get * Io no load versus Voltage * Rm internal resistance @ 20°C * Kv * Thermal behaviour (Kth °C/W and thermal time constant) So I could judge with my software the complete performances and compare with competitors. It's up to you Louis |
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Apr 26, 2007, 03:11 PM
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UT
Joined Oct 2004
1,624 Posts
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Quote:
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Apr 26, 2007, 03:44 PM
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Antony (France)
Joined Sep 2003
2,596 Posts
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Quote:
Sorry but, for now, I have no sample-motors to test. I "would be" ready to test, should be a better wording. Louis |
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Apr 27, 2007, 02:42 PM
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Florence, Al
Joined Oct 2000
29,157 Posts
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