Modified SIG Twister

Phil,

These are the ones I bought, they are made by great planes. I pulled up the bio for them and it reads as follows:



PICTURED IS A PACKAGE OF 4, 4-40 THREADED BRASS INSERTS THAT ARE DESIGNED FOR 3/8" THICK OR GREATER WOOD OR FIBERFILLED MATERIAL SUCH AS PRESSBOARD OR FIBERFILLED PLASTIC, YOU DRILL A 1/4" HOLE WHERE YOU WISH TO USE A 4-40 MACHINE BOLT AND THEN APPLY SOME EPOXY TO THE INSERT AND THREAD IT INTO YOUR MATERIAL TILL IT IS FLUSH WITH THE SURFACE. THE INSERT IS MADE WITH A SCREWDRIVER SLOT FOR EASE OF INSTALLATION. EXCELLENT INSTRUCTIONS ARE INCLUDED IN THE PACKAGE.

I bought these
http://www.microfasteners.com/nuts-brass-threaded-inserts-for-wood.html
and the bag reads


Phil

I'm not saying you are wrong, just that the products we bought have different instructions.

Phil

Well, looking at that I could very well be wrong. I'll definitely be using jam nuts next go around.

Thanks Phil, I appreciate it.

+1 on the allen screw with jam nut on those inserts, those can be pesky.
If you use an allen wrench, try a T-handle they are usually better quality and fit better and don't twist as much and make it loads easier to thread those inserts in with. And BTW nice twister build, makes me want to get started on mine! (Bandit)

Thanks Bandit,

I tried hard to make it not look like a Twister, I am excited to get working on it again.

Block tips!!!

This is my first attempt at this, I do like the way they look on other folks planes so I decided to try my hand at them this go around.

Basically I stacked 1/2" balsa sheet and glued/clamped them together with Ambroid. After that I traced the rib outline and cut that out of the block using the scroll saw. Once that was done I traced the tip shape on the top side and again cut that out using the scroll saw.

This left me with a rough shaped block which I slowly rounded out using the belt sander. I moved onto 100 grit and hand sanded the rough final shape followed by 150 grit to smooth.

I am still not near done with them, have lots of final sanding to do to blend it into the wing. The Dremel makes quick work of hollowing them out and they are becoming very light. It doesn't take long as what you see in the pics below is about 2hrs of work, started last night and sanded to shape tonight.

Ron The Tip Blocks look good , I like the look of them myself nice and solid , Did you cut the rudder down or does it just seem small Eric

Good eye Eric,

Yes, I went to sand the original one that I made for it and it exploded in the disc sander. I whipped another one up shortly afterwards.

It does look small, but smaller was what I was going for. Once I get everything mocked up I will see if it looks out of place. If it does then I will create another.

Ron

Good Heavens! Over 2yrs since I have done anything with this. Kind of embarrassing    Luckily I have been working mid shifts which equates to 9hrs of time alone so I got wise and brought the Twister into work. Got some funny looks from the FAA guys as I was carrying it in. You would think they had never seen a plane before

Anyway, I've covered the fuse and wing in Cub Yellow Ultracote. Planning on doing Navy Blue accents as well. Tomorrow it's time to set the wing and horiz stab and Epoxy it in place.

Ron

Hey Ron that looks really good. Can't wait to see it all trimmed out

Yeah, I like your wingtips. Did you carve those from a block? The tips in my Cardinal kit look like they'll be laminated planks partially shaped and then carved as much as the builder dares.


Nevermind, I just re-read all about it. That's a stout looking wing too.
Rusty

Almost done, still stressing about the vert stab, The original that I dreamed up with doesn't look right. I'll come up with something else.

The engine I settled on is a Super Tigre G-21.40. It's larger in bolt spacing so that's an issue, not by much, maybe 1/16" or less. Clamps could work.

Another couple pics to show progress.

Looks good, Ron. That's a good tough utility plane and an excellent pattern flyer.

Sorry, guys, I've been so busy, I haven't had enough time to pay attention much to the forums and post replies and comments.

Getting ready for 1/2A-Day Saturday too.
Rusty

.. I prefer the rounded fin-rudder shape like you originally had.. just maybe a little taller and longer; intersecting with the T/E of the elevator.  

I think it looks nice on this model below.. and where yours has rounded-corners on the stab./elev.. I think it would look even nicer. I see that you reshaped your elevator.. and could easily notch a rudder to fit around the root.. and back to its' T/E. Did you install a conventional music-wire "U-joiner"? There isn't much "meat" there at the root. Perhaps you embedded a spreader-plate which the horn will tie into?

Ron..too funny
Just yesterday I fiddled with a RingMaster that has been mostly built up since about same time you started the Twister

BTW I like your version of the wing tips

Between you and Rusty I really need to get off arse and build at least one of my 2 Sig Twister kits

be a real nomad and do short sub and upper rudder...for sure do NOT do the -very ugly to me -KIT rudder

This is what I came up with, not sure if I like it and at this point not sure if I care too much either.

All that's left now is the coupling, tank mounting and graphics. Should be in the air within a month or sooner.

Ron

Cribbs74 wrote:This is what I came up with, not sure if I like it and at this point not sure if I care too much either.

All that's left now is the coupling,  tank mounting and graphics. Should be in the air within a month or sooner.

Ron

Nothing wrong with that Ron. I think it looks pretty nice. I don't find the re-shaping of a fin/rudder to be an easy task. It can really make or break the look of the entire model.

I agree Roddie, and from some angles it looks ok and others not. It's straight as an arrow and that's all I was looking for.

Wingin' and slingin!

8yrs from start to finish, pretty impressive

She is ready to fly. Powered by a Super Tigre .40

Super Clown is done too, just need to put Rusty’s name on it. One good thing about a pandemic is I had some spare time.

Ron

Hey Ron,  that's not that bad lol i got a RM bipe from 2016-17 i haven't finished yet .. At least you got it done and both planes look really good !! I read back through this thread why i don't know but did get a chuckle out of this quote on page 2 ..  

Wow! 8 years? I thought that I had some projects that I was behind on... I'll bet I can dig up a dusty project to pass your 8 year record!
It looks great, Ron! Now, let's see the trim scheme, and Rusty's name on it.
Keep up the great work, man! THANKS!