Extra 300 (oz3606)

 

Extra 300 - plan thumbnail image

About this Plan

Extra 300 EP. Radio control scale aerobatic model. Wingspan 40-1/2 in (1030mm), AUW 750g. For brushless outrunner and 3S lipo. Requires 112 W/lb. Recommended motor KM 028310 with 10 x 8 prop.

Quote: "Hi Steve, Please find attached plan of a radio control, electric Extra300. I drew the plan up with reference from an ARF kit... which came with no plan (and I figured well, what happens if I crash... so I drew it up while it is in one piece). The plan is entirely my own work and I am making it available to you free to post on your website where it will also be freely available so I see no issue. I just wanted to send you something so that I can contribute towards your fantastic web site."

Direct submission to Outerzone.

Note it really is not possible to say for sure which ARF model Roger was working from when he drew up this plan in 2012. But if we had to speculate about a close match, one possibililty would be the World Models Extra 300 EP (manufacturer's code: E252B), which coincidentally has a wingspan of 40-1/2 in (1030mm), AUW of 750g, and is for brushless outrunner power with a 3S lipo, recommending the KM 028310 motor, with a 10 inch prop.

Accordingly, we've added a couple of model pics of the World Models Extra 300 EP (manufacturer's code: E252B) here on this page, which may or may not be the exact ARF in question - we couldn't say - but might help you to visualise the style of ARF that Roger might have been thinking of when he drew up this plan.

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Extra 300 - completed model photo

Datafile:

003.jpg
003.jpg

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

Hi Hardie, its a great plan however i dont find any marking of wing and stabalizer slots on fuselage. hope you rectify this.
Nadeem - 26/11/2013
I'm sure this plan is complete. The horzontal stab slots into the gap shown (measure the size, it is an exact fit) and the wings are retained with aluminium tubing which slots into the holes (2mm ply reinforced) in the fuselage sides. Looks fine to me.
SteveWMD - 26/11/2013
I built this plane and she flies very well. True the plans are not thorough but if you enjoy designing solutions this will work for you. CG is similar to other Extra 300s.
Anon - 27/07/2016
Hi! Beautiful plan, but i need to know what thickness are the hull ribs (F). Side view shows 3mm and top view shows 2mm.
John - 30/04/2019
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Notes

* Credit field

The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.

Scaling

This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.

 

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