Goldberg Ultimate 10-300 build
10-28-2010, 04:11 PM
#701
RE: Goldberg Ultimate 10-300 build
ORIGINAL: vince-mi
Ok I have a Goldberg Ultimate on one side of my shop and a Fox .74 ringed on the other. Will this fly it? Would be nice to put both in use but not a biggie if not.
Thanks,
Vince
Ok I have a Goldberg Ultimate on one side of my shop and a Fox .74 ringed on the other. Will this fly it? Would be nice to put both in use but not a biggie if not.
Thanks,
Vince
10-28-2010, 04:53 PM
#702
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RE: Goldberg Ultimate 10-300 build
ORIGINAL: Garthwood
vincemi..........................don't know what you mean, be specific please. If I understood you right is, that you have an Ultimate and you also have .76 Fox engine and you want to install this engine on an 11 lbs. bi-plane ?[sm=50_50.gif] How many of you understood the question ?
vincemi..........................don't know what you mean, be specific please. If I understood you right is, that you have an Ultimate and you also have .76 Fox engine and you want to install this engine on an 11 lbs. bi-plane ?[sm=50_50.gif] How many of you understood the question ?
Not looking for a wild plane I just like to look and have fun with it..
I Fly:
lanair .60
AZM DR1
Long EZ
Pole Star
Trainer
Gone:
YE SR71 -Sold
BV F86 Saber - Sold
A few Bill Evens aircraft designs - All dead
Thanks,
Vince
10-29-2010, 07:40 AM
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RE: Goldberg Ultimate 10-300 build
Vinc-mi...........................You should go with the 120. I feel it will be underpowered with anything less. This bipe will be over the 10 lbs. by the time you're done building.
10-29-2010, 12:58 PM
#706
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RE: Goldberg Ultimate 10-300 build
Yes I agree that having more power then you need is better than not enough but when I had mine I set it up with an OS 61 two stroke and it flew just fine! Of course there was no unlimited vertical but it flew very scale like! Anyway, thats my 2 cents! Best of luck!! Doug
10-29-2010, 01:34 PM
#707
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RE: Goldberg Ultimate 10-300 build
Vince,
Your Ultimate should not weigh 10 lbs. I've built 3 Ultimates and never have they been over 8.75 lbs. My current is 8 lbs.
I can't see how you can make one weigh 10 lbs. If you build it correctly, a .74 sized motor should work. I know nothing about the Fox engine, if it has any power. But remember Dave Patrick designed this around a K&B .65
I had a 1.08 in an Ultimate, and my current set up is a Super Tigre .90....both combos are great. I can't see the logic on a 1.20 or bigger motor, but then again I like to fly on the wing.
Your Ultimate should not weigh 10 lbs. I've built 3 Ultimates and never have they been over 8.75 lbs. My current is 8 lbs.
I can't see how you can make one weigh 10 lbs. If you build it correctly, a .74 sized motor should work. I know nothing about the Fox engine, if it has any power. But remember Dave Patrick designed this around a K&B .65
I had a 1.08 in an Ultimate, and my current set up is a Super Tigre .90....both combos are great. I can't see the logic on a 1.20 or bigger motor, but then again I like to fly on the wing.
10-30-2010, 07:21 AM
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RE: Goldberg Ultimate 10-300 build
Thanks all,
I guess I will build it light and see what I get. I'm not looking for unlimited vertical, just a nice scale style flying machine. It was nice to hear someone flying it with sixty range engine, if I want unlimited vertical I fly my 48" Pole Star with a .61.
Thanks,
Vince
I guess I will build it light and see what I get. I'm not looking for unlimited vertical, just a nice scale style flying machine. It was nice to hear someone flying it with sixty range engine, if I want unlimited vertical I fly my 48" Pole Star with a .61.
Thanks,
Vince
10-30-2010, 12:20 PM
#709
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RE: Goldberg Ultimate 10-300 build
There is no reason for this model to weigh 10 lbs unless you really like epoxy glue and over building. That said mine of about 20 years ago had an OS90FSR and my flying buddy had an ASP90 on his. Both were superb flyers and weighed just a few oz over 8 lbs. They didn't lack for power to do any of the conventional maneuvers. Since the real one never hovered or had oos capability overpowering it is pointless. It's meant to be flown and enjoyed. If you want to hover get a heli. if you want unlimited vertical then get into rocketry.
10-31-2010, 06:28 AM
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RE: Goldberg Ultimate 10-300 build
The Ultimate is a very versatile plane. It will fly scale aerobatics and it will also do some 3D stuff if you want. Mine weighs about 8 pounds with a Saito 125 and a heavier fiberglass cowl and it flies great and has enough power to hover with a low pitch high thrust prop. But mostly I just fly it around and do standard manuevers. I would think a 75 size two stroke would be fine.
10-23-2012, 12:16 PM
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RE: Goldberg Ultimate 10-300 build
DLE20 .....Might be a bit heavy for this a/c. Mine has the Saito 120 and is more than enough. If you want gas Saito FG20CC is much lighter, same casing as the Saito 125. I've an FG20cc Saito, i'm saving it for an Aeroworks Extra 300/60-90.
11-04-2012, 08:49 AM
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RE: Goldberg Ultimate 10-300 build
i finally found a used CG Ulti for the right price with the plan to swap the current ST .90 it has for my DLE 20.
I have read that is a great combo, so Im looking for to it.
Bill S.
I have read that is a great combo, so Im looking for to it.
Bill S.
01-29-2013, 06:05 AM
#718
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RE: Goldberg Ultimate 10-300 build
@sprinklertefch,
I know this is an older post, but I'm just wondering if you could tell me a bit about why you went with this setup? What was preventing you from having a direct linkage to the carb?
I know this is an older post, but I'm just wondering if you could tell me a bit about why you went with this setup? What was preventing you from having a direct linkage to the carb?
ORIGINAL: SprinklerTech
Yes!!!! Keep posting, I've had the sinus thing going on so I haven't been building lately but I'm starting back up tomorrow.
I had the same problem with the ailerons. I was really disappointed when I saw that the ailerons were a sheet too small for the trailing edge.
Here's what I got accomplished last week.
I spent way too much time on it, I first went with the design with the bell crank but I didn't like it so then I moved it further away.
Yes!!!! Keep posting, I've had the sinus thing going on so I haven't been building lately but I'm starting back up tomorrow.
I had the same problem with the ailerons. I was really disappointed when I saw that the ailerons were a sheet too small for the trailing edge.
Here's what I got accomplished last week.
I spent way too much time on it, I first went with the design with the bell crank but I didn't like it so then I moved it further away.
01-26-2014, 08:03 AM
#720
My Feedback: (6)
If you aren't comfortable with the soldered cable fittings, you can also go with DuBro's pull-pull kit. It uses crimps. I have used the Dubro on other planes, and it works fine. I don't think I'd move the servo back away from the original plans, as it will move your CG back too far.
For anyone just starting this kit, there is an easy way to make the top wing line up perfectly when assembling at the field. Higley's Bipes book outlines the idea of adding a couple pieces of ply cut to the shape of a "U", which you glue onto the structure of the wing. They are fitted to guide the sheet metal braket so the holes for the assembly wire line up perfectly with the holes in the sheet metal braket. No fishing around for the holes.
For anyone just starting this kit, there is an easy way to make the top wing line up perfectly when assembling at the field. Higley's Bipes book outlines the idea of adding a couple pieces of ply cut to the shape of a "U", which you glue onto the structure of the wing. They are fitted to guide the sheet metal braket so the holes for the assembly wire line up perfectly with the holes in the sheet metal braket. No fishing around for the holes.
04-10-2017, 05:24 AM
#721
I have been researching motor options and cams across this thread - great read.
it appears that the plane can take a wide variety of motors, from .60 2s to 1.50 4s, depending on your flying style. I've decided on a Laser 155 (uk made glow 4s) which compares with the OS120AX in weight and power, so it should be a good combo.
my 2nd choice would be a DLE20ra.
it appears that the plane can take a wide variety of motors, from .60 2s to 1.50 4s, depending on your flying style. I've decided on a Laser 155 (uk made glow 4s) which compares with the OS120AX in weight and power, so it should be a good combo.
my 2nd choice would be a DLE20ra.
12-14-2017, 09:06 PM
#722
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Dual servos
I'm building a Goldberg 10-300 Ultimate Biplane that I bought new in 1998 and sat on a shelf. The build is moving along well but I'm thinking of making a change in the aileron servo setup. Rather than mount a single servo in the center of the bottom wing. I'm thinking of using two servos in the bottom wing just to the inside of the interplane strut. My question is what kind of torque rating do I need? Because there are two servos, can I get away with some 35 to 40 oz-in each times two with metal gears? Any suggestions on specific servos? I appreciate any suggestions! Ray
12-14-2017, 09:13 PM
#723
I wouldn't go less than a analong 645mg or the digital 5645 on all surfaces.. This plane can do rediculous manuvers with very high g. The blenders are down right scary...
12-15-2017, 09:01 AM
#724
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Classic
Its amazing the reputation this Biplane has. I'm actually excited about building it. As far as the servos go, you like the HiTec line? I'm old school and mostly have used Futaba. They are very pricey but dependable. Actually I have been looking into the Savox servos. They have very impressive torque and speed specs for the dollar. Are the HiTec dependable? I fear investing 150 hours and a bunch of money into building a plane only to have it fly off into the sunset with no response to the stick.
