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

[GliderGuy]

My B-2 has developed a glitch and is grounded. Y’all that know a lot about gyros and control boards feel free to weigh in. I’m going to replace everything to be safe, but curious what y’all may say about the “problem”.

TX is ruled out….flying other birds with it w/o issues.

Yesterday, my B-2 went into a slight climb on its own. Took 3 clicks of down trim to halt the climb. Continued to fly normally when she did a rapid pitch “jiggle”. After this jiggle/oscillation, she needed 3 up clicks of trim and flew normally. It is as if the gyro lost its sense of level and then regained it after the jiggle. Made several more “normal” flights figuring it was a one-time glitch.

This morning she did it again, but the pitch jiggle/oscillation was more pronounced and she had a 50 ft loss of altitude, but flew normally until landing. I grounded her after this.

To me, the gyro is the most suspect, but control board, RX, wiring could all be suspect. Thoughts? Comments? Thanks!

-GG

[Bearcat]

What happened to Jeremy Solt's setup video?, I can't find it on Youtube or MotionRC's website

[Bearcat]

I didn't like the fiddling with rulers while setting up the control surfaces, so two gauges were created and printed. +/- 25mm for the rudders, 8mm Up trim for the inboard control surfaces measured at wing bottom. In case someone is interested in the STL files, I'll put them on cults3d. Just let me know.

I would love to see this myself- post a link if you haven't already.

[ridgerunner]

Looks like the B-21 has taken flight...

[GliderGuy]

Congrats! The technique is to get it down into ground effect about 6 inches up. Then hold her off and bleed speed/energy. If you end up with full up elevator, that’s fine. Touch down with as low energy as possible. Then she can’t bounce.

No energy…no bounce. Yep…you let her crow hop, and you will be replacing the nose gear servo as a minimum and doing major foam repair as a maximum.

If the wind is blowing, a gust can cause you to touch too soon. Disaster!!! Once in ground effect, go to zero power. Get the energy LOW.

Caution…6 inches!!! Get too slow too high and a wing will drop. Disaster!!!

Make EVERY landing the best possible landing you have EVER made!!!!

-GG

[sillyRabbit]

Perfect weather so I maiden-ed it today. Takes off great, flies great, landings.........🙄. Not a scratch on it, but it did bounce. I really thought I had it greased but it every so slightly hopped about 6" off the runway. So slightly that I thought I still had it but FWIW its not the first bounce thats the problem, its the second bounce that pops you back up 3'. If I keep doing that I'll definitely need a new nose gear at some point. Supposed I'll just NOT keep doing that and power up on the first bounce.🤪

[GliderGuy]

Yep….The non- slip matt is placed under the battery. I have always used Velcro. Not too much….or you’ll have trouble removing the battery.

Yes….it is well built. I have way over 1,000 flights on mine and have not uncovered any structural weakness.

-GG

[sillyRabbit]

If I am misjudging your skill level, my bad.

-GG

No worries about my skill level assumption. Any feedback is good feedback IMHO. I'm up for the challenge. I've never seen the no-slip mat in a Freewing EDF before. In that there is no mention of it in the manual anywhere, I assume there's a common practical use. Having never used it before my best guess would be to keep the battery from slipping but just dont know. Even tho I only spent $250, its a really nice product and well worth taking the time to look into all the minutia involved in keeping it in one piece.

[GliderGuy]

Just picked up this aircraft at an auction. Was looking for a way to up my game and from what I can tell this is just the challenge I was looking for. Couple of questions tho... From what i have seen so far drag rudder recommendations are all over the place. What initial length of opening at full open. Mine came out to 42mm after following you tube video stating to set rate at 70% in which the target was 45mm. How much up trim on inboard surfaces. Currently 7mm as per same video. Clear vertical stab? - YES or NO. And finally whats the non-slip mat for? Battery? thanks SR

Hi SR….Lots to learn about this EDF.

You should go to page #1 of this forum and read EVERY B-2 post before you fly it. It will save you some grief.

Fun bird….but “special”. If you don’t have at least intermediate skills….postpone flying it until you sharpen your skills. Your question about the non-slip material indicates somewhat beginner experience. If that is the case….DON’T fly this EDF.

Drag rudder = close is good enough
Clear Rudder = use it, but many do not
Trim = start out as recommended, but you will probably add more up
CG = on the mark
Fly only in 5 mph wind or less
Order spare nose gear parts….mount, servo, doors, nose wheel assembly….especially the servo.

Make EVERY landing the best landing you have ever made…EVERY time. Don’t get it bouncing or you will need the nose wheel spare parts.


If I am misjudging your skill level, my bad.

-GG

[sillyRabbit]

Just picked up this aircraft at an auction. Was looking for a way to up my game and from what I can tell this is just the challenge I was looking for. Couple of questions tho... From what i have seen so far drag rudder recommendations are all over the place. What initial length of opening at full open. Mine came out to 42mm after following you tube video stating to set rate at 70% in which the target was 45mm. How much up trim on inboard surfaces. Currently 7mm as per same video. Clear vertical stab? - YES or NO. And finally whats the non-slip mat for? Battery? thanks SR

[yf222000]

She’s right at 45 inches wide without the wing extensions. 34 inches nose to tail.

STRONGLY suggest you read ALL of the pages in this B-2 forum before you decide.

Fun to fly and a crowd pleaser, but she may not be for everyone (wind limitations and landing skills).

Couple of examples… post 1244 and post 1305

-GG

Thank you very much! Have a great weekend.

[GliderGuy]

She’s right at 45 inches wide without the wing extensions. 34 inches nose to tail.

STRONGLY suggest you read ALL of the pages in this B-2 forum before you decide.

Fun to fly and a crowd pleaser, but she may not be for everyone (wind limitations and landing skills).

Couple of examples… post 1244 and post 1305

-GG

[yf222000]

Hi gents, and ladies if any here. Thinking of getting this B2. Could someone help with the span measurement of the center section of how long it is? Trying to figuring out if it would fit in the car is all. Thanks in advance.

[Aros]

Yeah I joined months ago, been there a few times. Wish I lived closer! Great field. Good people. I am moving to Astoria, OR so I regrettably won't be a member anymore. Maybe I can make the event down the road.

[JohnVH]

Ahh, no worries, you were at the event? Thats awesome. I go at least once a year to that field.

[Aros]

Ooops, misspoke. I meant Robert.

[JohnVH]

Yep, John's a great pilot. I was there! Incredible club. Joined it this past Spring. I call it the Taj Mahal of RC Clubs.

John who? Talking to me? This was Roberts. Ive been going to the RAF for decades, even before it was at this field!

[Aros]

Yep, John's a great pilot. I was there! Incredible club. Joined it this past Spring. I call it the Taj Mahal of RC Clubs.

[JohnVH]

First one I have seen in person! Check out this field!

[GliderGuy]

Hi Bearcat….

Please read post 1406 for B-2 report.

-GG

PS: Talking mainly about airframes, and over 1000 flights on each….(likely over 2000 on some)…
P-38 needs no airframe mods
AL37 needs added carbon stiffeners epoxied into each wing’s wiring channel
F-4 needs no airframe mods but needs beefier elevator hardware
PJ-50 needs several smallish carbon stiffeners added to/embedded into the bottom wing skin about 1/3 the way out from the root
MiG-29 needs VT to allow alpha lock recovery and beefy elevator servos and hardware. Needs beefing up around main gear support areas.
B-2 needs no airframe mods