Mine came out at 5 lbs also ! Maybe ours are heavier then others or our scales are bad
Do not put the 2-56 supplied rod on the rudder. It will bend like a Banana under load ! Here I would strongly suggest a 4-40 push rod. Just my $0.02

Well, my cold and the wind were in agreement enough to let me get three flights in yesterday. The first one was kinda harry as the weight I had put on the nose must have come off on takeoff. 10 minutes of flying around in a harrier. Stuck some more on and flight got much better.
This is going to be a very fun plane to fly. Did not try to hover except to see if the 72 would pull it out, it will. Flat spins and knife edge maneuvers are good.
Plan on taking off early today and see if I can get in another 5 or so flights to realy get the plane figured out.
Ed M.

Mine weighs 5lbs on the money w/ OS 46fx. on digital scale. With as much wing area as it has and w/ the power of the OS it sure does fly light. Bentgear how much does that Saito .72 weigh. Is it lighter than the 2 strokes.

Bentgear,
Glad you are having fun with the 330 ! when putting on sticky weight on the nose, try to hold them down with a couple of small tie wraps. I stick them (use them only if absolutely necessary, and no parts can be moved in the plane anymore) on the bottom of the fuse right where it makes a curve under engine, and then drill two small holes (just big enough for the tie wraps to go through) in the fuse, and then put the tie wraps on and tie the weight to the fuse. Won't come loose in a million flights !

Bentgear I am curious as to where you have your battery. Mine is forward of the CG under the switch and my CG came out about 4.75" back. So yes I am a LITTLE TAIL HEAVY.

Battery and receiver mounting.

I cut some a piece of the vertical piece of the ply out to give me room to stuff the battery and receiver as far forward as possible in the wing. Used the foam rubber bought from towerhobbies. I'll take a pic and post it. I don't think I will be adding any extra weight for balancing.

Ulf, I was hoping to get in one flight with the weight stuck on just behind the engine and bent over on both sides before I put it on permanently. Just was not meant to be. Stuck another in the same place and it stayed.

heliplane, the OS 46 and the Saito 72 are almost identical in weight, or at least the ones I have measured are. I don't have an accurate scale to weight the whole plane.
I have a 1,1000 mah nicad stuffed in against the front of the wing held in with foam rubber and a popsicle stick.

I may find that I need to change the positioning of the ailerons up or down a little. I adjusted them by visually taking a centerline of the wing end and placing them on that plane, then measuring from the bottom of the fuse up to the aileron surface and adjusting the other accordingly (hope that makes sense).

Ed M.

My 330 is coming out extremely tail heavy.I used Jr STD 537 Servos except for the throttle I used a Hightec 225 bb.I have a nylon pull pull 4 the ELEV. And CF pushrods 4 the Rudd.and Ailerons. Battery is under the fuel tank.TT46 Pro with a Macs Muffler up front as far as it will go and still extremely tail heavy.How much weight are you guys having too add.Is anyone else using this setup and having this problems. THANKS SHARKEY

Sharkey, I had to add 1 1/2 oz. at the nose to get mine to balance just a little tail heavy. Using 537's all around. The front mounting oblt on the 72 is about 1/2" back from the front edge.
Ed M.

Here is how I mounted the Bat and Rec

Looks like I need around 3 OZS of dead weight too make this plane balance.I can't understand why mine seems so tail heavy when I used Cf pushrods and nylon pull pull on the rear of my plane.That should be around half the weight of the 440 wire. I also have the battery under the fuel tank and you guys have yours in the wing.Is the weight of the Saito 72 the same as the 46 before the muffler?What do you guys think about weighted spinners?Do they affect motor performance?Help!!!!Please!!!!!!Thanks

Just commenting on the plane coming out tail heavy. With an OS46fx.....I just went down and rechecked my CG I am over 5" from the leading edge....I have very little down in my elevator and plane shows no tendency to snap at low speed....Carl Goldberg must be pretty conservative on there CG recomendation

Thanks Heliplane,that makes me feel a little better.Someone wrote in the Profile Brotherhood forum that this plane didn't like tail heavy situations and being this is my first profile I didn't wan't too push it. I have a tt46pro, probably not much weight difference.What I was thinking if I had too add that much weight I would change out the motor for a YS 63 or a Saito 72.What should I do. Thanks

sharky how far back from the leading edge are you trying to balance?

what type nose cone do you guys recommend. Light plastic or heavier aluminum spun? Does it make a difference how the engine spins up and down using light or heavier. This is my first funfly also.

I think that aluminum spinners actually help your engine run smoother....I have had some vibration problems using the larger plastic spinners...I used a GP 2" aluminum spinner..looks great and works well with the APC 12.25x3.75 prop without having to cut....Magnum makes a good aluminum spinner....if money is not an option than Tru turn probably makes the best one

Thanks Heliplane, I have a spun 2 1/4" aluminum. I may just try this one. It looks good on the plane. I have no idea of the manufacture.

Hi Buzbo, Im trying too balance at 4 1/2 back from leading edge.I have the aluminum 2 1/2 spinner and still tail heavy.

Sharkey, I'm going to balance right at there limit which is 4-3/4" .This would help on your balance problem. From what I've read I think they will be fine at 4 3/4". If it does fly tail heavy we won't know it to we are about out of fuel, I would think.

Buzbo,Yea I think thats what I will do.Heliplane said he was over 5'' with no adverse affects.I just don't want too push it ,ya know.Thanks for helping.

It definitely acts more tail heavy when tank is low.....loves to hover with no fuel....oh wait I can go another 30 seconds....that will be the death of me on this plane....Iv'e deadsticked it twice once even downwind and no problem with stalling or snapping...that's why these crazy designs that are all wing are so nice

I kinda like the 5" CG suggestion. Mine, at 4.5" is very quick to drop the nose in low speed, high alpha flight. Though not dramatic, it is "pronounced" over a Sig Somethin Extra I fly too. I think some of the paranoia of moving the CG back on this plane was a comment that the elevator becomes too touchy. This is true for just about any plane. Just keep your low-rates small throws at first and/or give yourself some expo till you get used to it. I think manufacturers automatically give you forward CGs that ensure success for those new to the hobby.

Of course it is going to be touchy, but that was not the concern addressed. If your CG is to far back this plane does not only becomes touchy, it becomes almost not flyable. Not talking about landing. Trust me, I have flown several planes with aft CG and all of them get touchy on the elevator but this one is a little different. At least for me.
Oh and by the way, CG at 5" is not moving the CG back. Try 5 3/4" or more and you will see. Then compare it to a Top Cap or other in it's class.
Expo is almost a must when setting CG back.
I would definitely not recommend to put the CG behind 5" for maiden flight ! I would set it in the most aft position recommended in the manual (if you have flown planes with aft set CG) and then work from there.
Just my $0.02

Tex, what does it do at 5.75"? Is that the unflyable part or the touchy area. Thanks for your pioneering in that area. I've never had the guts to go a whole inch past farthest recommended on anything. I've got a larger IMAC plane down right now for bent gear because I moved a little over .5" back of recommended. Dam thing got real touchy- real -fast, but you know how it is, just had to get that 3D setup going.

I call it unflyable because it is just to touchy, and either goes up or down like crazy. Just the smallest input of elevator is too much. Trimming on the elevator is almost not possible. When slowing down it tries to get into a automated hovering position (you can't call it even harrier anymore), which makes it very hard to land. I flew my Top Cap at about 5 3/4 " and I had to land it under almost half throttle power. Was bending the landing gear all the time. Went back to 5", and was much more satisfied.
To some it is probably flyable, but to me it is no more fun, and you are just trying to prevent a crash instead of flying and having fun.
I now move my CG back little by little until I like the way it flies, and performs all the 3D stuff well. This is of course my preference and doesn't mean that others like it. I have read here that some guys leave the CG at 5 3/4" .