WARP 4 Series
|The New Rcer WARP 4 Hi-Torque 6-Pole
Brushless motors are the new power king in their class. Rugged
construction, 400 and 480-class mounting positions, and near identical
dimensions and weight to Speed 400 brushed motors all make the WARP 4 a
"drop-in" replacement for Speed 400-480 direct drive applications. The
2-turn and 3-turn are excellent in ducted fans, and their higher Kv also makes
them well-suited to geared applications, such as 2M gliders or large E3D.
The 3-turn is also a favorite for direct drive super-fast models at up to
26A continuous on 3S lithium*. The 4-turn to 6-turn are usually run
direct-drive in 300 to 480-Class airplanes. 3.5mm Gold Bullet
Connectors, 3ea Male/Female, are included with each motor.
See video of the 3-turn motor in a F22 foamie pusher jet here (BL4-15-3, PQ-2600-3S, GR 5.5x4.5 speed prop)
The F22 pilot remarked "During a five-minute flight similar to the one in the video, the F22 lands with the motor just warm to the touch!"
[note: this is not necessarily a green light to ignore the manufacturer max ratings... says NipponDave]
|The power advantage enjoyed by the BL4 15 Series motors is due to carefully
shaped silicate-iron stators - which maximize wound copper and minimize
magnetic shorting between the plates - plus extremely powerful,
optimally-shaped magnets on the rotor. Kevlar sleeve on the rotor
allows the BL4 16 series to turn up to 40,000 rpm continuously.
It is easy to see the Warp 4 advantage, when you notice that the internal resistance of the motors is identical to other 6-pole motors in the same class, but the Kv is much lower due to the stronger magnets. That's why the Warp 4 motor can turn a larger (or higher pitch) prop than the competition at the same amperage and voltage. Larger props add even more to the overall effciency of a power system.
are the Warp 4 the most efficient motor in their class, they are also the
shortest, at 34.5mm, and lightest, at only 73 grams
(without connectors attached, to compare with other brands).
The hard 3mm output shaft is suited to rough landings in direct-drive models. Pinions for the Maxon 4.4:1 Ceramic gearbox are available for the BL4, along with new 68mm high-performance EDF fans with 3mm adapters.
The BL4 come with two sets of mounting holes, to cover all applications:
* 2x M2.6 holes@16mm spacing (400 spec)
* 2x M3.0 holes@19mm spacing (480 spec)
|Click Links for
|2||3880||4.10A||0.012||40000||74.5||Prop Tests 2-Turn|
|3||2580||2.00A||0.026||40000||74.5||Prop Tests 3-Turn|
|4||1810||1.30A||0.045||40000||74.5||Prop Tests 4-Turn|
|5||1430||0.95A||0.068||40000||74.5||Prop Tests 5-Turn|
|6||1190||0.80A||0.110||40000||74.5||Prop Tests 6-Turn|
|Note: Prop tests which show amperage exceeding spec are for your information only, but not recommended for that combination of battery, propeller, and motor.|
|Model Type / Example Setups|
Insane EDF, Pylon APC 4.1x4.1 30A~43A
1.5-2.0M LMR Glider w/4.4:1 Maxon 35A~60A
EDF, Pylon 4.7x4.7 20A~26A
Very Fast Models - Pusher Jets, etc
1.5-2.5M Gliders w/4.4:1 Maxon Gearbox 35A
Fast Models 400g - 750g
PQ-1800-3S, APC E 6x4, 15.6A
Fast to Medium-Speed Models 400g~900g
PQ-1800-3S, APC E 7x5, 16.0A
1.5M Gliders GR 8x4.5, 9.6V KAN 1050 16A
Medium-Speed Models 400g~1000g
9.6V KAN 1050, APC E 9x6, 13.0A
9.6V KAN 1050, GR 9x5, 13.3A 8160rpm
Note that all the BL4-15 Warp4 motors have the same max power(W) rating for 5 minutes, of 260W. While this is accurate in fact, in practice we usually limit input voltage in models of the 400-480 class to 12 volts (10 cell NiX) or 11.1V (3S Lithium). To go higher than this voltage is ONLY recommended when the speed controller BEC is disabled and receiver and servos are powered by an additional 4.8V battery or switching power system (S-BEC). Most users prefer the simplicty and light weight of the speed-controller BEC, so let's assume that 12V is max voltage for all of these motors, for most applications. In that case, the 6-Turn motor would be limited by available voltage (12V) and the max continuous current rating (14A) to:
12V * 14A = 168W
That's still a LOT of watts for a 400-480 class model, and is delivered with high final efficiency since the 6T motor can turn a relatively large propeller, which minimizes losses at the prop itself. Large diameter / high pitch props turning slowly lose less than small props turning very quickly...
Likewise, note that the 2T motor is rated
for 32A max continuous. At 12V, however, the max continuous amperage
would be limited by the continuous rated power of 260W, like this:
260W / 12V = 21.66A. Since the motor is really quite efficient up to
and even beyond 40A, its best used in 2S Lithium or 7-cell NiX applications
direct drive, or as a geared limited-motor-run setup in gliders for absurd
power/weight performance in 20-second bursts.
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