What was the spine of that Ben, I can't remember?
Anyone know what the biggest DTFB or FTFB plane is?
- Thread starter Mr Man
- Start date
The Twin Noob Wonder I brought and flew Last year was 12.5' and did loops, It is nearly all Foam. There is a Dollar tree thin metal broom handle connecting the wings to the body.
The Twin has a 30" center section bringing the Total Wingsan to 150"- The wings are built like the previous years wings, AUW-16lbs
I specifically designed it to be all Adams Readi-Board Construction.
I think Ben's B-52 is the winner here, but there are many interesting ways to tackle the strength concern.
The Twin has a 30" center section bringing the Total Wingsan to 150"- The wings are built like the previous years wings, AUW-16lbs
I specifically designed it to be all Adams Readi-Board Construction.
I think Ben's B-52 is the winner here, but there are many interesting ways to tackle the strength concern.
Houndpup Rc
Legendary member
You can always add a wood spar right?
Piotrsko
Legendary member
Build it any way you want. Carbon fibers are really strong in tension, but wood also is good in compression, the other part of strength. Whack a cf spar with a 16 oz hammer and you just ruined the CF, but it just dents the wood. Remember everything dynamic has an opposite force trying to cancel out
Houndpup Rc
Legendary member
Yeah...But CF for that big a plane could cost a lot....
Do you mean in the fuselage or wing?
The fuselage was just an empty box section. A few foamboard doublers at seam joints and a few triangle-gussets in some corners, but no wood or carbon, and no central “spine”.
The wings each had two full-length foamboard spars. Nothing else down the span. To JOIN the wings together they had three CF tubes that crossed centerline, but only right at the root.
There were also two short CF tubes, mounted sideways in the fuse; but those were only to hold straps for attaching the wing, they did not contribute to fuselage stiffness or strength.
It should also be mentioned that the “Monster BUFF” was 100% “Monster Foam”: the double-thick (well, 185%-thick) foamboard that FT had for a short while.
The main reason the wings didn’t need an additional spar was Span Loading: EACH wing had approximately 60ft of 14AWG wire and four motors and nacelles! At least half, maybe more, of the entire aircraft weight was distributed down the wing instead of being concentrated in the fuselage. Even then, you can clearly see the wings flex considerably on the flight video.
Wing, thank you for answering
The monster foam explain a lot!
Thanks Ben!
Piotrsko
Legendary member
Hmmm. Actually never considered multiple layers of foamboard skins. Mind blowing concept that would work well. Mikey likes. Well except for building the wing twice, but oh well.
A real Buff wings move about 8ft up or down at the tips. Latest models of boeing stuff does ditto if you ever sat at the takeoff end of the runways watching planes. Until the police come by and tell you to leave.
A real Buff wings move about 8ft up or down at the tips. Latest models of boeing stuff does ditto if you ever sat at the takeoff end of the runways watching planes. Until the police come by and tell you to leave.
Houndpup Rc
Legendary member
Do you speak from experience? 😂
Piotrsko
Legendary member
Maybe
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