Alien 7 4S2P Monster Cruiser

By SPST_V on Sep 10, 2017

7  1,090  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

Discussion

Sign in to comment

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.

Guides & Reviews

31 4,725  50
Nov 19, 2020

FPV has had quite a journey. Just a few years ago we started racing drones around a track and doing flips over trees, but professional cinematic FPV is a more recent development. DJI has always owned the drone photography market, but smaller acrobatic drones are starting to enter the market. They have the advantage of close proximity flight indoors and around people. There's more artistic freedom and..

Read more
Aug 26, 2020

For the longest time we've been limited to 3 to 4 minutes of flight and lots and lots of batteries. With more efficient motors and frame designs it's now possible to push the envelope much further. This guide will walk you through the process of building a micro long range quad capable of flying 8-30 minutes and more than 4km. The build is moderately difficult, but with the right tools and steady hands..

Read more