Alien 7 4S2P Monster Cruiser

By SPST_V on Sep 10, 2017

7 1,113 7

Rebuilt. https://rotorbuilds.com/build/4904

Fried $30 air shipped motor and $24 ESC at 4S1P test flight.
That hurts. I think I'll tear this thing down T_T

Photos

Part List

Frame	ImpulseRC Slammed Alien 5" Freestyle Frame (34 builds) Rotorriot.com	$82.99
Frame	4 x Alien 7" CF Arm 4mm (2 builds) Impulserc.com	$52.80
Flight Controller	FLIP 32 - F7 - OMNIBUS V2 (6 builds) Readytoflyquads.com	$41.99
ESCs	4 x 50A Wraith32 PLUS - 32bit BLHELI ESC Readytoflyquads.com	$96.00
Motors	4 x ZMX FinX40 CL07-1.5K "HMS Minotaur" (4 builds) Silver-drone.com	$159.96
Propellers	HQProp 7"x4.5 (17.78cm) Propeller Set Orange - 4 pcs, Glass reinforced Flyduino.net	$6.00
FPV Camera	Runcam Swift Mini 130 Degree 2.5mm FPV Camera Build in OSD PAL/NTSC Orange/Black 22*22mm RC Drone (59 builds) Banggood.com	$34.99
FPV Transmitter	TBS Unify Pro 5G8 HV (SMA) (596 builds) Getfpv.com	See Site

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Discussion

FlyingSquirrelFPV Dec 06, 2017

How do you like those esc’s? I have some for a 5 inch build.

russm Sep 13, 2017

I saw your other build of this. Looks awesome, the mounting you've used looks super clean and tight!
You had quoted 5min on the previous build, how's the 2x1300mah 4s for flight times? I'm trying to decide between 6 or 7 inch cruiser.

SPST_V Sep 14, 2017

Unfortunately, I couldn't have proper flight with 4S2P setup yet. I expect 7-10 min cruising.
Because this guy is way too heavy.. auw over 700 is no joke lol I really like this but not a great cruiser.
I recommend forget alien and get a light 6inch 6s setup. That motor should be able to cruise over 10min with that.

Walker Sep 11, 2017

I really hope you had a defective ESC, because I'm putting together a 6s 6" with those motors... Was hoping to use 35A ESCs I have laying around, and just cap them all @ 470uF, plus a 1000uF on the power lead. What size capacitors did you use?

Maybe inadequate air flow since the motors are designed to cruise @~60 mph?

SPST_V Sep 12, 2017

1000uF x4 for each ESCs. I think it is almost overkill..
It was not a heat issue, these motors stay cool all the time. It felt pretty good.
I started to really like this quad... and a crash and a magic smoke lol..
Very very high quality motor, just a very very bad crash.

Walker Sep 12, 2017

Aaaah sorry to hear, but that's a relief for me! When I see the word "fried" I tend to assume heat or current as the sources of the component failure. I can't wait until mine get here. Silverdrone shipping speed is somewhere between glacial and turtles in peanut butter.

SPST_V Sep 13, 2017

Yeah you will be pleased. Really liked the prop-holding teeth as well, that thing really bites.
I think shaft bent at the crash and that giant esc threw massive current to spin it right before disarm.

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