F3B Tool

[Jantar2A]

Here is the next build to hit my bench,an F3B Tool
I thought I would share some pic's of the build as I go along.

Nick

[wakumann]

Nick

maybe try a vertical shoot this wallpaper is really distracting, :)


Cheers


Thomas

[P-51flyer]

Awesome! My tool should be here sometime in July so it will be good to see a build before I get it to make mine go faster!

Aaron

[jofo1]

Awesome! My tool should be here sometime in July so it will be good to see a build before I get it to make mine go faster!

Aaron
Aaron, let me know before you get started, a few things I learned from my build might be helpful. jwf

[Jantar2A]

I wired it up first.
I start by preping all the connections by tining them 1st.
I allway's use rosin core solder as well as flux on everything.
doing it in this maner I've never had a failure due to a cold solder joint.
The flux is a must beleive me, if you don't use it you take a chance on getting FLUXED ;) by a bad connection.

Nick


P.S. Very little wallpaper just for you Thomas ;)

[Jantar2A]

I thought that I would compair the wing to the crossfire before cutting out the opening's for the feed through controll linkage,

This step is allready done on the crossfire so I thought it would be a good idea to see how it was done on the crossfire before cutting the holes,,being as the Tool and crossfire wing's are allmost identical,

I'm just gonna copy what I did on the crossfire being as it's clean and works perfect.


Nick

[jofo1]

The G10 horns provided with the Tool are outstanding. The design provides the stiffest connection I've felt for a control surface...hanging on every post.

[P-51flyer]

Hey Joe,

Is your tool going to be flying this weekend? What servos are both of you using? Will Airtronics 761's fit under the wing skin w/out any bulge?

Aaron

[jofo1]

Maidened on Monday. I'm using 368BB's for rud/elev/flaps and 168's for ailerons. No problem with bulge, the issue is getting the horn under the flat cover. The geometry is tight to get adequate flap travel (at least for me). I have some blister covers coming from sporter. I'm planning on flying Saturday afternoon, and again Sunday if conditions are decent.

[Jantar2A]

I'm sure that the airtronics 761's would work fine through out.
I have 761's in my crossfire and this wing is just about identical with the exception that it hold's more ballast and has slightly different size flaps and trileron's,,,the amount of room inside seem's to be the same,,,

oh and yes crossfire blister cover's would be perfect too. I might see what I can come up with


Nick

[Jantar2A]

Here are some pic's of the pushrod exit's with the G-10 controll horn's and cover's

go slow and test fit everything before using glue.

Nick

[P-51flyer]

Awesome, thanks guys! I made a little jig to match drilling holes for the servos on my viking to keep them under the skins so hopefully the wings are about the same thickness. Made it pretty easy to keep everything under the skins and get plenty of travel. I will be out at thorton one day this weekend if not both days.

Aaron

[Jantar2A]

I cut all the aileron's and flap's and test fit the G-10 controll horns for fit and clearance and glued them in place.

I trimed and sanded the exit cover's but didn't glue them in place at this time.

Nick

[Jantar2A]

I have finished installing the servo socket's and servo's in wing all we need now is pushrod's and cover's and the wing's are done..

Nick

[jrerickson]

Just noticed what the pattern on the bottom of the wing will look like...nice promotion!

John

[Jantar2A]

I have finished the pushrod's on the wing's,,Blister cover's just like the one's for the crossfire would be perfect...

Nick

[Jantar2A]

I don't know why they send flat cover's with the plane??
The factory team planes have either blister cover's or a hole cut in the cover or both like this one here in the pic.



Nick

[target]

Is the wing designed so that the fuse and joiner boxes won't die in the event of a cartwheel?
In other words, does the small center section "break away" in a hard landing?

I never liked 2 piece wings, even though I haven't had a problem yet. It just seems like there is a much better chance of only buying a joiner on a 3 pcs wing in the event of a problem.

If so, I like it.

Can you post a close-up photo of the center section, and one bolted to the fuse, Nick?

Thanks,
Target

[F3X]

Hey T,

The wings slide together completely THEN bolt down on the fuse as if it were a 1-piece wing. The wing "roots" create a special shape that keys into the fuse saddle making it all nice and solid. The bolts come from below and screw into a nut-plate that holds the wings together and holds them down at the same time.

I would expect a "landing" that is hard enough to twist the wing off the fuse would just about be a total. As expected when you hit that hard.

You are looking for a fuse-able link. Like Nylon screws that will shear off on a hard landing, on the Tool I wouldn't think it would help much, it would tear out the connectors etc. I am sure its more than stout enough for the purpose.

Dude: Just land better :D :D

[target]

Thanks, Tom.

You've seen my landings. They are pretty smooth.

You just never know when some totally obscure radio glitch could occur, and I figure I'm over-due now....

Thanks for the info.

T

[roydor]

In the last few years most models coming out have such strong joiners that in most crashes I've seen they stayed intact and the joiner boxes were broken. Usually the wing itself was demolished in such cases.
Having only the joiners break hasn't been a real possibility since the days of the Pike Plus or the original Ellipse and even then there was considerable damage to the wing.

[target]

Actually, I was thinking along the lines of the Acacia II, and my thinking is geared towards F3F landings in a rotor.
If the joiners are small enough to break, and replacemnets are available, but still stiff enough to do the job, then it seems like an all-win situation to me.

At the last F3F here in SoCal, we had a newbie have a bit of a landing problem, and his joiner broke. No other damage to speak of. It was an Acacia II, with a 3 piece wing. That's a good thing.

Anyway, seems like the Tool's design intent didn't have anything to do with saving the wings in the event of a bad landing, there must be some other advantages....

T

[wakumann]

Hi Target,

Main advantage for the distributor/ manufacturer in case of a hard landing they can sell another complete model.

Don’t know why they design the fuse/ wing attachment this way.

Conventional wing attachment never failed (at least with steel fasteners), and even tapped on wings are proven up to 230 mph


Will be interesting to hear how the Tool competes in Switzerland.

Sorry Nick to hack your tread.

Keep on, good work.

Thomas

[target]

Don’t know why they design the fuse/ wing attachment this way.
Thomas

I'm not sure why either. But since it's so unusual, I think there must be a good reason?
I don't see the advantages to it as of yet...

Some of my comments may seem strange, but they are coming from strictly an F3F point of view, not a proper F3B point of view.
Most of the F3B planes can work well as light air F3F planes, and some in strong lift. But the typical slope landing zones are less friendly than the F3B LZ's I think.


Sorry Nick to hack your thread.

Keep on, good work.

Thomas

Same here, sorry Nick.

When's the maiden?

Target

[ShredAir]

I'm not sure why either.
Because they can. --Dieter Mahlein, ShredAir

[Jantar2A]

I'll post more pic's soon,,,Not sure when the Maiden will be,,this one is not mine,,I'm Just doing the build..

The wing mount might be good for break away bolt's/ nylon or composite???


Nick

[target]

Nah, if it's like the way Tom described, he's right that it won't matter; the parts keying together will likely do damage anyway.
In that case, I'd use whatever they supplied the plane with.

Looking forward to a maiden report.

T