Cox Extra 300 Review


The name “Cox” is rooted so deep in model aviation, some people refer to all glow motors as “cox” motors. Being given a fresh face by the Hobbico family of companies, the new Extra 300 appeared early this spring to fill a much needed micro aerobat slot. Let’s see how the Extra 300 scored…

Intro and Flight Footage
5X5 Review Scoring



Assembly is fast and easy (under 2 min.), and the battery charges up in about another 20 min. from the factory pre-charge. Since the radio is also bound and configured form the factory, there’s little to do other than find a smooth driveway for take off. Our Extra 300 jumped right off the ground and took to the air immediately.

You’ll want to keep the rates on low until you get settled into the fast roll and slip of the Extra. After a few laps, we had it flying smooth with little trim needed. Now the fun: high rates and pattern maneuvers! The Extra has enough thrust to get out of it’s own way and let you have a little fun doing it. Rolling through arcs was a lot of fun and we even pulled off a few soft snap rolls. While you can’t hang on the prop, knife edges, hammerheads, and the typical power maneuvers are quite possible and surprisingly straight and stable.

Slightly greater than 5 minute run-times had us very pleased overall with the flight experience. Durability is phenomenal but with the bulkier expanded polyolefin FlightFlex™ airframe you’ll find the Extra to be a high-speed only glider. Landings are straight on, coming in a little hot, quick flair and touch down…in that order. Any other approach and you’ll be thankful the landing gear and airframe are so tough! An amazing value from Cox.


5X5 Review Scoring

Model Characteristics

Build as Advertised:

Build Instructions and Advertised Difficulty...
5 / 5


Covering, Paint, Plastic and Decals...
4 / 5


Specified Powerplant Performance...
4 / 5

Ground Handling:

Landing Gear, Floats, and Hovering...
4 / 5


Model Impact and Transportation Durability...
5 / 5

Pilot Experience

Flight as Advertised:

Flight Experience As Compared To Marketing
4 / 5

Flight Time:

Flight Duration Of Recommended Powerplant
4 / 5

Field Size:

2 Brothers Flying Site Recommendation
Small Park


How Easily The Model Transports Without Damage
5 / 5

Skill Level:

2 Brothers Recommended Skill Level

Model Specifications

Model Type:


Wing Span:

20 in (508 mm)

Wing Area:

62.4 in² (4.02 dm²)


3.35 oz (94g)

Wing Loading:

7.7 oz/ft² (23.5 g/dm²)


18 in (457 mm)

Motor Design:

Brushed DC

Fuel Type:

Nitro Methane

Volt Range:

2S LiPo (7.4V)



Radio Channels:


Included Radio System:

2.4GHz w/Digital Trims and Dual Rates

Included Charger:

AC Wall Adapter, Balancing LiPo Charger

Included Battery:

2S 7.4V LiPo 250mAh

Needed Items:

Nothing - RTF!

Street Price:

$99.98 USD

Special Features:

FlightFlex Airframe, SafeProp propeller design (break-away)

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One Response to Cox Extra 300 Review

  1. avatar gerard m weaver says:

    The one I have the servo`s had a lot of lost motion right out of the box, for me it was not flyable. I took 90% of the end play out and I was flying OK. You do need to keep the speed up to keep it flying. It is definitely durable. Make sure you have it balanced.

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