Posts: 69
Joined: 11/13/2004 From: York,
PA, USA Status: offline
I am just about to start a Goldberg Extra 300. I would appreciate any comments or ideas on improvements to make in the construction. What should I use for power? I was thinking about a YS 110 but if this is not available due to supply constraints; what would you suggest? I am going to use a TNT landing gear and Fiberglass Specialties Cowl and Canopy although I have not purchased them Yet. Looking for ideas! Bill
Posts: 935
Joined: 11/1/2003 From: Kootenai,
ID, USA Status: offline
Try an OS1.08 with a 14X8 APC prop. I did nothing to mine exept enlarge the lightining holes in the fuse a little bit and use the duel aileron servo setup. I have not flowen it yet but have seen this combo and man what a performer!
Posts: 177
Joined: 7/31/2002 From: Dillsburg,
PA, USA Status: offline
The YS 1.10 would be perfect. I built the 300 about ten or twelve years ago and put in one of YS's first 4 strokes...the f-1.20. It was an awesome combo. That was absolutely my favorite plane to fly before I got one of the patrick 1.20 size ultimates five years ago. I wish I still had the extra.....I do still have the plans.....Mmmm .....winter is just starting here.......Mmmmm.
Posts: 259
Joined: 8/28/2002 From: Huber Heights,
OH, USA Status: offline
I just put a Goldberg Extra 300 on order, already have the SuperTiger 90 to put in it. I would also be very interested in any upgrades or mods to the kit to make it better. Also what would be a good size fuel tank and prop to use on this ? Not looking for 3d, just nice aerobatics.
If you will be flying from thick grass, I suggest that you try moving the landing gear forward about an inch or so. I have no trouble on hard surfaces or very short grass, but it is very difficult to taxi on thick grass without nosing over.
I replaced the stock landing gear with a carbon one. Have Saito-150 in it that is excellent.
Posts: 69
Joined: 11/13/2004 From: York,
PA, USA Status: offline
Now I am getting confused. Looks like ys 110's won't be available for several months. Considering OS 1.08 2C or 120 Surpass III 4C with pump. Did any one put a larger tank in their plane? Plans call for a 12 oz tank and I don"t think that is large enough for the 1.08 2C. I will be flying off grass so the LG comment is appreciated. I plan on using a TNT Al gear. Any comments are appreciated. I just got back from knocking the LG out of my Ultra Stik 40 due to a sudden gust on landing. Maybe this is the last flight till spring. This weather reallu s--ks!
Hi. I am building my second Extra. It is almost ready to cover. I angled the LG base, so when LG is sitting on the base, is a little forward. My first Extra nose over all time. Also I enlarged the rudder a lot and the ailerons. While flying my first Extra, I noticed that having more rudder would be better, so I did. I am using for power a Saito 180, the engine/plane is a nice combo, I mean, really good. I have available a YS 110, but not interested on use it here, dont think it would be fun at all. If someone would like some pics of the rudder and LG modification I will post them.
Hello; I built one of those 10 years ago too, I still have mine but haven't flown it for 6 years or so. Let's see, I bought aluminum landing gear for it after the first year. Then I bought a fiberglass cowl and wheel pants the second year. I flew it with a Saito 120 for the first two years but put an OS 91 in it and liked that better, after that. I put two aileron servos in it, and covered it like the box cover. I cartwheeled it on a down wind landing and kind of mushed the wing tips up a bit. I flew it quite a bit back then but never did get around to fixing teh wing tips. It hangs in my bedroon mow, it still looks pretty good.
I found a Graupner square 500 cc thank that fits perfect without any modification. I will post some pics tomorrow, my camera is not here. I will show you also the rudder and the LG platform I did. I am using the TNT aluminum LG. If not Graupner, I think you can find any other brand, but square, that is the trick.
Posts: 259
Joined: 8/28/2002 From: Huber Heights,
OH, USA Status: offline
Is that the 13 ounce graupner tank ? I have one of those in my Showflyer. I was seriously thinking of the Aluminum gear. My Goldberg Ultimate Bipe had the wire gear in the kit, didn't even try putting those on. Got a set of aluminum and love em. Any suggestions on the setup of the radio equip ? Flaps, pull pull rudder, dual elevator servos ? What are some of the setups you have used or seen used on this plane ? Any Ideas would be great. All I have decided so far is adding aluminum gear if it does not come with fiberglass cowl and pants, then getting somea those, and using a Supertiger 90 in it.
Hi. My digital is an old version so pics are not that great for details. I made a new hard wood plywood LG base and glued it at certain angle so the LG is a bit forward to avoid nose over. Inside you will have to make the appropriate reinforcement with hard wood triangle stock, etc. Then you can see my gas tank, is a 500 cc!, but fits perfect into the original designed tank compartment. Last, you can see my rudder vs the original one (old plane), it actually looks more elegant and I hope that it will work much better. As for servos, I am using pull pull in rudder (90 oz), two elevators at the back of the fuse (51 each), two ailerons (around 60 oz each).
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Goldberg Extra 300 - 
