Ok
I am thinking of going with the Futaba 9252 they have a
69oz torque at 4.8v and at 6.0v it has 87oz of torque.

And the receiver I was going to use is a Futaba R168DF 8-Chanel FM DC 75MHz.
To power all of this cool stuff I will use a
Sanyo 4N700AAC Receiver NiCd Pack Flat 4.8V 700mAh

Thanks, Flyer 202 [sm=shades_smile.gif]

P.S If you think any thing should be changed to different servo
or brand feel free to tell me and the other readers.

excellent choices may want to increase your mah on your rx batery

I guess you are thinking about a 4-5 lb 40 size plane. You didn't say. I have flown 3 of them for a couple of years using standard servos - usually Hitec 325, 425 with no regrets. I have used 700 mah nimh batteries also. The idea was why spend lots of money to get a light engine then use a battery that is way heavier than rqd. I always recharge with a charger that tells how much juce it took to refill the battery and seldom need more than 250 mah. However few things are less fun than runnig your battery dead in flight. So be careful.

I use standards servos and a light NiMh pack too. Sanyo 720mah AAA 5 cell pack is about 2oz. Most .46 profiles fly best around 4 lbs, no need for expensive servos. I really slam the plane around and never had a standard Futaba strip.

Keep the cost and weight factor low and the fun factor will be high

I am in the same boat as Jack Hyde. I have a accel katana GS profile and saito .56 and all standard servos and I have been very happy. Plus the digital servos drain the battery alot quicker that is the main reason I didnt use them also the cost is a down side. In my opinion digitals just arnt needed for an inexpensive profile. My .02 cents.

Sorry I did't say that it is a Carl Goldberg Extreme 540 3-D ARF
We are putting in a Thunder tiger .51 and all that other stuff.

Ok now the fun stuff so you are saying that I don't need to get
these high toque servos and just go with the slandered servos.
Because the plane and all my friends from the flying field say put in
70oz servos because of the crazy stuff I am planing to do with it next summer.

Well this Sunday I will go and ask my friends at the field and get back to you.

Flyer 202

You didn't mention what size profile you were flying, or your level of skill. I think you'll find that the more experienced 3D pilots like to use digital servos for one reason-blinding speed. I also think you'll find that most of them learned to fly 3D on something with standard servos that were much slower. There's a huge difference in speed between standard servos and something like the 9252's that you mentioned. There's also a huge difference in price. I really like the Futaba 3004's for all of my 4 lb. profiles, and I've never stripped one or had one fail. They've got ball bearings, nice centering, and good enough speed for a beginner to intermediate 3D pilot. I've used Hitec 55's, 81's, and 85's on throttle as well as a couple of 3004's. 4.8V is a good battery choice, I always use something in the 700-800 mah size. I use one of the Maxx products switches with the charging port, makes it easy to check battery voltage between flights without having to remove any hatch covers.

As George E mentioned, lower cost=lower pucker factor=more fun when learning 3D.

The Goldberg 540 is not a great plane. It's been a while since I've seen one but I remember them as heavy. Also, be VERY careful that plane usually ends up tail heavy. I remember watching an experienced friend have his hands full on his maiden flight. He is a capable builder but the plane was very tail heavy, I don't remember why.

Ok I have been flying seance the beginning of this summer and I have about 100 flights under my belt 75 flights with the next star and 25 flights with the mid star and have been on almost every flight been hovering it and I have a G3 simulator. I hover a Yack (3D) and any other 3D plane. I Also have been teaching my dad how to fly. He is picking up on it pretty fast. The Carl Goldberg plane is a 40 size plane and one of my friends fly's one he said it fly's great with a fast roll rate.

Flyer 202

Like I suggested my katana is a great plane it will torque roll all day long and can be had for $60.00 on ebay I got a 40 and a 70 and it has the best knife edge of any plane I have ever flown the down side is Ive torn my elevater loose dragging the runway with it. Standard servos work great ive been flying 3D for 4 years now and I am a quite capable flyer. I couldnt be happier. I will get some pics up here soon!

Just because something flys great with a fast roll rate doesn't necessarily make it a good choice for a 3D airplane. It's also way too heavy, poorly constructed, and has some nasty flight tendencies. You need to spend some time reading through many of the threads here in this forum to see what some of the more popular 3D planes are. Sure, there are guys who can fly excellent 3D with one of the Goldberg profiles, but those same guys could probably do rolling circles with a broom stick with a motor stuck on it.

Do yourself a favor and talk to some guys with real 3D experience, or at least give some consideration to what different people are trying to tell you in this thread. There are a ton of profile airplanes out there that are better suited for learning to fly 3D than the Goldberg. On the other hand, if you already have the plane, well then, fly the crap out of it and have fun doing it. When you crash it, and we all do, then look around to replace it with something better suited for 3D. By that time, you'll understand what we're trying to tell you.

If you want real 3D then go for something like a Katana profile or (even better) a Mojo.

As for servos -- I've used standard (HS425BB) servos and found them more than adequate for a 40-sized (4.5lb) plane. The *best* thing you can do is to use a 5-cell (6V) receiver pack, that'll make your cheap budget servos run a whole lot better (ie: faster, more torque).

I've only ever stripped one set of gears flying 3D profiles with standard servos -- and that was my own fault (engine stopped, ran out of fuel while hovering at about 3 feet and it fell back onto the rudder).

Once you get a bit more practice, you'll probably find that switching to a faster/stronger servo will pay dividends, but while you're just learning a standard servo (on 6V) will still be heaps faster than your reactions :-)

Yea, 5 cells will for sure speed up the servos at the cost of a few bucks and less than 1/2 oz added weight. I would use a 4 cell battery to start and go to 5 cells later. Also think about a 6 oz tank. Inever use more than 3 or 4 ozs per flight on a .4 size 3d plane.

Why?

What's less than an ounce of weight when you compare it to the *significant* improvement in servo-performance. Just 7/8ths fill your tank instead of filling it right to the top if you're worried about the weight.

I used to use those AAA-sized packs but found them too risky. They have too much internal resistance and if you start really throwing your plane around they can sag badly.

Now I use the 2/3A packs. Radical RC's latest 5-cell version of these is 1400mAH, weighs just 4oz and will handle up to 20A of continuous draw (that's *lots* of headroom).

I *have* flown a 4-cell AAA pack flat (it died as I was taxiing back to the pits -- no damage fortunately) despite what I thought was careful management and leaving a safety margin but I've never had any problems with the 2/3A cells.

I'd rather have a plane that weight 4lbs 8oz than one which weighed 4lbs 6oz but stopped responding half-way through a flight :-)

Yea I already have the plane and before that I was looking at the MOJO and I was relay considering it, looks like a good plane from all the videos of it. I have now changed over to the Futaba 3010 Standard High torque servos little cheaper (24.99) and the torque rating on them is crazy on 4.8v it has 72oz and at 6.0v it has 90oz of torque. Maybe that is to much I don't know if I am going off in the wrong direction please put me on track. Talking about the plane being tail heavy the friend I bought it from told me with the .51 motor is needs considerable amount of weight in the nose to balance it out

Flyer 202

There's no such thing as a servo that is "too powerful" and there's not a lot of difference between a standard servo like the HS425BB/S3001 (just under 2oz) and a powerhouse like the Hitec HS5955TG (just over 2oz).

The S3010 servos have a good power-to-weight ratio and so long as you can live with the slop in the gears and outputshaft they'll do the job *very* nicely.