Extra 300 differences
 

I've read that the elevator and rudder is larger on the 300XS than on the regular 300S/L but I can't seem to find by how much.

So say I wanted to build a Great Planes Extra 300/60 this winter and say I wanted to convert it to a XS model. Are there other differences?

Also, has anyone out there tried to airfoil the tail on this plane?

Thanks.

Extra 300 differences
 

The great planes extra is a 300S and not a extra 300. It gets pretty tricky.

Now the difference between the S and the XS
The full scale XS has an all carbon fibre fuselage design in comparison than the aliminium/ wood 300's and is remarkable lighter than the 300. A new larger engine, a 330 Lycoming was used instead of the 300hp. In the US some 300s were modified to have the 330 tail at least. These Extras are named EXTRA 300XL (300 XS).


An Extra 300 had the mid mounted wing and smaller rudder with 2 seats while the 300s had basically the same tail group but the wing was made much lower due to probems with sight during full sized aerobatics, also the s was for single seat.

To modify the GPlanes s to an (xs) all you really need to do is modify the tail section, bigger all around also the elevators have counter balances.

The XS features a larger amount of rudder area. This increase in area can be seen by the size of the counterbalance as well as in the chord of the rudder at the trailing edge. Extras have been known for needing a little more rudder area and that's just what the XS has.

Top and side views of the XS
http://www.team-rebel.org/graphics/300XSFuse.jpg
http://www.team-rebel.org/graphics/300XSTop.jpg

Hope this is of help

Extra 300 differences
 

3D Mike,

I will agree with most of what you said, but there is no such airplane as an Extra 300XS. Walter Extra never made one. Just like Walter Extra never made an Extra 330 of any kind. There are some full scale pilots, that have had there Extra's modified, and put decals on them saying such things. Walter Extra has only made the Extra 260, (only 1) Extra 300, Extra 300L and the Extra 300S. There is an Extra 400, but it is a small piston powered general aviation plane that carries 6 (I think) people.

Extra 300 differences
 

Don't forget the original 230 and the newer 200. It's interesting about the number of 260's out there. At the full scale nationals last year, there was an Extra 260 that operates out of Waco, TX. The Extra 260 was on the registration plate, not just a sticker. While there is not a name change, the 300 L and S can be ordered with the 330 hp engine.

Tracy Hill

Extra 300 differences
 

300XS, yes there is... :D :D

I was not implying that Walter himself designed the new models but the aircraft do exist, the XS is a recognized extra throughout the full sized aerobatics circuit. The history is that one of the US Aerobatics team members I think from memory his name was Phil Knight was not satisfied with the original S so modified it, placing in the motor and changing the fuse materials to composite and enlarging the tail surfaces. This aircraft the EXTRA 300 XS was flown the first time in competition at the 1998 World Aerobatic Championships..

My thought behind modifying to the XS with a 300s would be only to improve the 3d capabilities of the plane while keeping it scale. With the full-sized aircraft having the large surfaces, TOC and unlimited Imac pilots could add the balance tabs and large rudder on the tail-surface and still keep it inside the rules for modifications... Really a greatplanes extra is an entry level model so it wouldn't matter what you did to the tail surfaces, personally I would put the hinge points on 50% of the stab and make them air-foiled. Should improve the 3d performance, for pure IMAC I would leave the tail stock, its a proven design.

But how much?
 

Ok, but how much larger are the control surfaces?

Don't suppose someone out there with a Sig Extra 300XS could take a good photo of the tail and do some measurements?? Please..... :D

Extra 300 differences
 

The sig extra won't help you any if you want to 3d.......

Extra 300 differences
 

Where can I get 3 views of an Extra 330 or a 300L?

Thanks,
Eli

Extra 300 differences
 

Hello all,

Here is a quick run down of all of the Extra models, in order.

1) Extra 230

This was the first airplane that Walter Extra built for aerobatics. It is a single seat and has a steel tube fuselage and was covered in aluminum and fabric. It has a mid-wing design that is similar to the Laser 200, Edge 360, and Edge 540. The wing is all wood and it is powered by a 230 hp. engine (I think it is a modified Lycoming IO-360, but I'm not sure about that).

2) Extra 260

This was a modification/redesign of the Extra 230. It was beefed up and sported a new all composite wing and a Lycoming IO-540 of 260 hp., hence the name change to Extra 260. This also was a single seater. It also had a new cantilever tail (airfoiled and supported from the inside) as opposed to the welded steel tail that was on the 230.

3) Extra 300

This is a two seat, 300 hp. version of the Extra 260. It still had the mid-wing and it used the same construction methods as the 260.

4) Extra 300L

This was the first of the low wing models, and the L in the model number designates that this is a low wing Extra. This came out in the late 80's or early 90's and the wing position was changed for asethetic as well as performance reasons.

5) Extra 300S

This model came out after the L model did and was a single seat version. It too has 300 hp.

6)Extra 200

This is a smaller verison of the Extra 300L. It has a smaller fuselage and I think Extra 300S wings. It has a 200 hp Lycoming IO-360 and was designed to appeal to aerobatic schools, though alot of them are going into private ownership as well.

7) The Extra 330 series...

3DMike is right. The 330's are not a production aircraft. The first one was modified in house at Aerosport, the US distributor for all of Extras including the 400 and soon to be 500. The 330s have a bigger rudder and elevator (that is counterbalanced) and a Lycoming IO-580, a little bit bigger powerplant that cranks out 330 hp. If you ever talk to a person that has flown aerobatics in a full scale Extra, they will tell you that the rudder is not that strong and you really have to stomp on it during knife-egde flight. Extra never really made these airplanes in production, but a few exist in the hands of world class competitors. There are two S models that I know of, Gene Soucy's (which he bought from Phil Knight and is selling right now...) and Peter Bessenyi's. I think that Extra made 1 330L prototype, but it could have been a modified 300L.

Eli, you can find 3-views at www.aerosport.com . After the redesigned their site, they took the 3-views off, but you can e-mail them, or if you are serious, it is better to call. They had some trouble finding the S model 3-views, but they found them. (I was in charge of getting some documentation for Warren Thomas and Quique Somenzini for their TOC paperwork), so they might have them close at hand now. Hope that this helps.

Extra 3 views
 

Bob Banka at Scale Model research has 3 views of most anything
http://www.bobsairdoc.com/


The full scale Extra site is:
http://213.68.239.250/extra/
Not any 3 views I found but really interesting to look.

Bill