Graupner Extra 300s
 

I picked up a Graupner Extra 300s (63in wingspan) this past weekend from HL on their after "Thanksgiving" sale. I need setup suggestions. I'm considering the recommended TT61Pro. Is that enough power for this plane? Prop? Balance? Likes/dislikes??

thanks

RE: Graupner Extra 300s
 

Cruzomatic,

It was a good decision to buy this plane.Last season I had the same plane /Patty Wagstaff decals/ and all I can say that it"s a really good behaving,forgiving machine.Takeoffs,landings are a breeze, easy to fly it indeed.I was using a Magnum 61,12x6 Apc prop. and its power was enough for normal pattern.Some guys are using 91 4str. engines for this plane.That was my 1st low wing plane and got accustomed to it in no time.I liked it so much.Balance:according to the manual.Dislike:0
Good luck to your plane!

Georgee

RE: Graupner Extra 300s
 

georgee,

Thanks for the reply. ;)

RE: Graupner Extra 300s
 

Cruzomatic,

Your Welcome,pls. post your pictures about the plane.

Georgee

RE: Graupner Extra 300s
 

Keep the plane light and you'll love it. This plane is the exact same plane as the Seagull Extra 300. Same build, same components, everything is the exact same(except internally, the pushrod guide tubes on the seagull are metal cased with plastic tube inserts). The color schemes are also the same, except the SZeagull uses black where the Graupner uses the blue striping. If you need replacement parts for your graupner for whatever reason, you can use the parts from the Seagull. They can be obtained form Horizonhobby.

I put a Saito FA90-TS(twin) in my Graupner. Engine produces 1.2HP. That motor is the same weight as the recommended 61 two stroke on Hobby-lobby's website but a good increase in power. The TT61pro produces 0.85HP. You may way to go with a 91 4-stroke to get nice power with room to spare. The 61 is the minimum I'd fly that plane with. You sohuld also consider putting in a bigger fuel tank as the stock 6.5-7oz tank is really too small...even for a small 2-stroke.
I put a 16oz boat tank in mine becausde it was slim. Its a Sullivan "Vee" type boat tank. Works great....only modest modification to get it to fit in the fuse. I can take a picture of my setup if you want.

You'll also probably want a larger prop then a 12x6 as that will not really have enough thrust for decent vertical. A 13 or 14 would be better. So, my recomendation is get a 91 4-stroke....or a larger two stroke cuz you'll really want more power then the YY61 will give you. Keep the weight of the plane under 7.5 pounds dry. At close to 8 pounds, it will have a tendency to drop the left wing if you get too slow(ask me how I know). Mine weighed 7 pounds 14 oz because I had onboard glow for use with the twin 90 plus the extra battery to power it.

I now am building the Seagull version as a replacement and am using the Saito [email protected] HP

RE: Graupner Extra 300s
 

I just got this plane second hand and without an engine. My plan is to use a OS FS-120. Has anyone tried this combination?

RE: Graupner Extra 300s
 

I just installed a Magnum 91 2s (14x6 prop), and a 16oz. Dubro tank in mine(Tank mod took a bit of work).
During vertical lean checks...you have to actually pull down on the Ship.
That should be enough power! I want to fly it in September, at a local IMAC contest.
Also...a fresh set of JR821's make it a very stable and constant plane.