Official Freewing B-2 Spirit Bomber 86" Twin 70mm EDF Jet

[Evan D]

The Admiral Pro 6000 weighs 846g by Motions site. The Socokin 600 I am using weighs 830g. I have the tail end of the battery even with the foam edge aft of the battery tray. Jax Quad has a good picture on RCG. Mine is where he shows but I do have the battery wires going towards the front and he has them towards the rear. With my fingers this is just slightly tail heavy to the CG marks under the plane.

I agree battery placement is not a good description of balance and should be accurately checked.

There was mention that balance isn't that critical on the B-2. Flying wings are typically sensitive to balance because they don't have a tail to leverage pitch and yaw. The B-2 is big so the critical range may be larger than other, smaller, wings but it still is going to be more critical than most planes.

[xviper]

I don't want to be a Karen here but I just have to go on the record that using battery placement in the battery bay is a poor way to convey CG. RX placement might be different, etc., etc. I wish everyone at this point would stick to using dimensions from wing root or some other fixed point, as the gold standard. I promise to pull out my ruler and measure if I find a great working CG placement for a plane. For some planes a few millimeters can transform a plane from difficult and unpleasant to a new favorite.

I'm with you on the battery placement. "My battery is 2mm beyond the 3rd grain of the wooden tray". The thing is, my battery weighs 900g. My other battery weighs 700g. Where the CG is or where you choose it to be doesn't change. You can put your guinea pig in there and strap him down. The CG doesn't change just because you've got a guinea pig in there. I may put 3 hamsters in there and they won't be in the same place as your guinea pig.

[GliderGuy]

Hi SanExup,

“…don't know if you saw the latest MRC video with the Trio of B2s? It looks like they ended up moving the battery back.”

Yes and very cool.

I will probably experiment with moving the battery back.

However, I made 37 flights on my day #1 with the CG slightly nose heavy (Admiral 6000 with rear edge lined up with the trailing edge of the battery tray).

Pretty well shows this is OK for maidens. Why? Out of 37 landings, I had only 3 that were slightly bouncy and she didn’t do anything weird on the 3. No bounces when the wind was calm…wind came up and that’s when she bounced a little the 3 times.

I submit that these results are hard to beat.

No argument that the CG can be experimented with and probably should be.

To each his own, but for now….I like the way she lands and handles the mild bounces I made her endure.

-GG

[Aros]

I don't have the numbers and can't prove this statement but I have the feeling this may be our most successful launch of an RC aircraft since the twin 80mm A-10. Just outstanding sales. What a tremendous model. Simply cannot wait to fly her.

[SanExup]

I am so glad I got this plane. Even though it might be a month before I can fly it, I'm still super excited about it. The B2 to me is such a visual representation of human achievement and it's mission effectiveness proves the design. So I knew the instant I saw the release video that I would own one. The last flying wing I had was a Zagi400 maybe 26 years ago. I know I was daydreaming about the B2 when I flew the Zagi. This will be one of the prized planes in my hangar.

GliderGuy , I don't know if you saw the latest MRC video with the Trio of B2s? It looks like they ended up moving the battery back.

I don't want to be a Karen here but I just have to go on the record that using battery placement in the battery bay is a poor way to convey CG. RX placement might be different, etc., etc. I wish everyone at this point would stick to using dimensions from wing root or some other fixed point, as the gold standard. I promise to pull out my ruler and measure if I find a great working CG placement for a plane. For some planes a few millimeters can transform a plane from difficult and unpleasant to a new favorite.

To me it looks like where the CG is may not make much of a difference in flying the B2 but it looks like it is one of the variables that can make a huge difference in landing it without bouncing.

[GliderGuy]

Me too / fingers. I agree, close to mark works, but a tiny bit nose heavy may be better for a maiden on any bird. Then experiment after that with moving the CG back.

I am slightly nose heavy on the B-2.

-GG

[Evan D]

John, do you have a B2?

Fingers for me too.

[kallend]

What kind of balancers are yall using to balance the b2. I used a great planes balancer with either a admiral 5100 carbon or hrb 6000 and if you hold the plane level on the balancer at recommended cg and let it go it would go either way. tilt forward or tilt back.

Fingers.

[xviper]

“By the grace of God and with the help of these two fingers” ………………………. I don’t plan to do any different when mine arrives. This and with most “large” foamies, a few mm either way isn’t going to make a lot of difference. I don’t get terribly anal about it.

[Jomama]

I noticed the twitchy control surfaces on mine when your in self level mode or trainer mode, but when in regular gyro mode it is fine on the control surfaces. What kind of balancers are yall using to balance the b2. I used a great planes balancer with either a admiral 5100 carbon or hrb 6000 and if you hold the plane level on the balancer at recommended cg and let it go it would go either way. tilt forward or tilt back.

[Evan D]

Bottom line this is a great user friendly plane.

[GliderGuy]

Just got done watching the video from earlier today, and looking at these pics here as well and this video, I have decided, this is my next jet.

I have three versions of the B-2 I still fly to this day, largest is over 6 feet in wingspan, but not as modern as this new one. Really looking forward to more footage and hopefully some customer reviews and helpful input.

Welcome to the land of opportunity! Your wishes have been answered!

There are about 36 pages of this forum you truly should read.

-GG

[KOM4462b]

Just got done watching the video from earlier today, and looking at these pics here as well and this video, I have decided, this is my next jet.

I have three versions of the B-2 I still fly to this day, largest is over 6 feet in wingspan, but not as modern as this new one. Really looking forward to more footage and hopefully some customer reviews and helpful input.

[xviper]

I just sent the Scale Police to your house. Stay calm. It's just a short stint in the pokie.

They won't be able to find me in the snow storm we're having today.

[GliderGuy]

Which is why I wonder if it's that big of a deal if my right clam rudders close below the TE a few mm...I mean that's full left rudder stick...When would I ever be in a situation of FULL left rudder flying this bird?

In my opinion, if you are symmetrical drag rudder wide (45 mm to 50 mm) with neutral stick and close to TE tip flush at full rudder, you are good to go.

No clear vertical fin, you’ll work the rudder more in turns apparently. With it, you won’t need rudder in turns based on my experience with the fin on.

BTW, the manual edits look good.

-GG

[Aros]

Flat spin?

I just sent the Scale Police to your house. Stay calm. It's just a short stint in the pokie.

[xviper]

Flat spin?

[Aros]

Stall turn...

Hard pass.

[kallend]

I heard about this model a year or more ago and I was so thrilled. Outside of the SR-71 and Concorde (crossing fingers), this was the model I have been waiting for (from Freewing) for years. When Alpha talked to me about the challenges, it was immediately clear how much thought and R&D goes into such a model. Alpha and the rest of the R&D team worked their tails off to deliver the most scale, stable EPO foam EDF B-2 Spirit that could be imagined. To me, the clear V Stab is such a small concession to insure added stability in flight even though it's not mandatory. Employee or not, I would have the same opinion about these fine models. It's a thrilling time to be in the hobby.

But yes Freewing, step up to the SR-71 and Concorde challenge.

They'd be cool, but I'd like to see a Vulcan bomber, and I think it would be easier to engineer. Plus, the real thing could be flown like a fighter.

https://www.youtube.com/watch?v=wN7wpdeD2TU&ab_channel=HighFlight

[Evan D]

Stall turn...