agent adds

Hi just finishing the beast-im using 2400 sanyo rx pack sub c and the 1250mah pack for the turbine-
where is the best place for them for correct c of g?

maralomar

Hi, check the manule, the best location as recommended in the manual. In my Bandit, i locate all batterise between and fron the air intake.

Try it and you will get the right CG

steverobertsuk

Adam-ere

Bandit ARF's always come out nose heavy. I'd look at putting the batteries back a little, maybe the ECU pack around the area of the main tanks, possibly on top of the turbine hatch.

The two that I have built had 2x 2s 2100mAh Li-pos on the radio try and a 2500mAh 2s Li-Po on the turbine hatch and the CG was spot on the manual location.

The suggested CG is nose heavy but a good starting point for test flights.

I wouldn't want it any more nose heavy than what is written in the manual......

Steve

Jamie C

I have two 3000mah 2S2P lipos under the inlets up against the front wing spar, ECU battery is at the back on the left hand side below he hatch lip and the rear of it is against the ply former, CG worked out realy well and it felt so much better. My CG is about an 1"1/4 back from the recommeded position.

Andrew Bird

I found my barf was better with the CG back as well. I ran 2 x tp 2100 lipos and a 4200 2c lipo for the ecu. I had the 4200 and 1 2100 at the rear of the turbine bay and 1 x 2100 up at the intakes. Still had a few ounces of lead in the tail with this set up!

Here's a photo of the same set up which I'm using in my super Bandit.

ravill

My Feedback: (11)

Yup. BARF's come out nose heavy as per BVM recomendations. If you don't land with the nose down you'll run out of elevator!!! [X(]

Batteries should be placed wherever you can! My BARF's are usually stuffed to the brim as I run 42 oz of smoke as well!!



Raf

Hammbone

My Feedback: (309)

Ravill,
Where did you put a smoke tank?

Thanks, Jim

topgun24

My Feedback: (25)

I run 2 Fromeco 5200 Lithium Ions. They are between the main fuel tanks and just in front of the main wing spar. They fit perfect and hold the tanks in place as well.

acw

My Feedback: (1)

I use 2 Li-ion 2600 2S batteries for the rx which are right in front of the rear former around the wing trailing edge. 

SinCityJets

I had 2 - 2300 Mah packs for the receiver, and a 3 cell A123 for the ECu. All were back as far as I could put them.......and I still needed tail weight.

Also, you need to balance the CG (if you're using the holes underneath) with your hopper about half full.....especially if you have the large one. The reason is, that hopper sits so far forward of the CG and it's the last tank to drain.

So, I had my batteries all the way back, and 3.5 oz's of leac under the pipe in the very back. Flew like a dream []

Chad

Hammbone

My Feedback: (309)

It "flew" like a dream? Past tense? Say it isn't so. What happened Chad?

Jim

SinCityJets

Jim,

I had an in-flight failure, resulting in an unrecoverable (for me) attitude. A better pilot could have maybe saved it. Great plane, I have another one on the way.

That's the name of the game. You know what they say....if you can't afford to crash, charge it! Or something like that.

Chad

Hammbone

My Feedback: (309)

Sorry to hear that. I know you were very happy with the plane.

Jim

ravill

My Feedback: (11)

I put the UAT in the nose as well as the air cylinders. That left me room to put 2 10 oz tanks on each side of the bypass and 2 12 oz sullivan saddle tanks just behind the mushroom former. 42 oz, yeah baby!!!!

Oh, and this is my 4th bandit (easy, I sold most of em..) and everyone else is sooo right about Cg placement. I have my c/g a full 3/4 inch behind and it could go back I'm sure to an inch and it would be great! CERTAINLY don't make it more nose heavy than what BVM recommends. Like I said before, you can easily run out of elevator on touch down!!

Raf

Hammbone

My Feedback: (309)

Thanks for the info Ravill.

BVM has revised the recommended CG for the Bandit ARF. I just received a new Bandit ARF last week, and they are now recommending a CG of 9" back from the LE at the root. In other words, 3/4" behind the 1/16" dia hole.
It sounds like you (and others) are saying that you have your CG 3/4" behind the hole as well, correct?

We probably need to be careful that someone doesn't think someone is recommending to move the CG back 3/4" from the new recommended CG of 9".

So, just for clarification, you are saying 3/4" behind the hole, correct?

Thanks, Jim

ravill

My Feedback: (11)

3/4" BEHIND the predrilled hole. Yup, that's what my BARF is flying at now and its wonderful!



Raf

acw

My Feedback: (1)

To clarify, 9" is 1/2" after the pre-drilled cg hole. Some people like Raf move it back further by 1/4"

ravill

My Feedback: (11)

Right, like Arnaud said. There is my way, then there's the wrong way!!

Raf

Hammbone

My Feedback: (309)

My predrilled hole is at 8.25"

Jim

acw

My Feedback: (1)

Are you sure? Maybe some early production BARF?

Hammbone

My Feedback: (309)

I just purchased mine, so it's the latest version.
The instruction manual does say to balance the plane at 9", 1/2" behind the predrilled hole, but then in the next sentence of the instruction manual, it says that the predrilled hole is 8.25" back from the leading edge of the wing. Obviously, it's a little confusing. I measure the hole to be 8.25" back from the leading edge of the wing, but it depends on where you measure from. If you measure from the start of the leading edge on the fuse wing fillets, then it's probably 8.5" back.
I'm just going to balance mine at about 3/4" behind the predrilled hole.

Jim