capmike

what are you guys using for hinges on your speed planes to keep away flutter? ca or something else?

Rudeboy

Definitely no CA hinges... these things are horrible! Some people may like 'em, but I just think they really are a PITA... don't go there...

If you want to use hinges, use REAL hinges.

Tape or covering hinges are perfect too if used the right way. A good Mono- or Ultracote hinge will be ten times as good as any "CA" hinge... (and at least ten times as strong)

The same goes for skinned hinges.

Anything but CA hinges...

rockhouse

My Feedback: (5)

On my ARF Magnum I used the supplied CA hinges. On my DD I use CA's but install them prior to covering. Then I cover the wing & aileron as a unit, deflecting the control surface away from the side I'm covering. This gives me a sealed hinge line that will not pull out, flutter, or fail.

CARS II

My Feedback: (7)

Hinges, the best, strongest are the Robarts for the 40 size planes, drill a hole the push Epoxy 30 min. in it clean it with a paper towel wet with alcohol do the same for all the rest, before you put the hing put a drop of oil on the pin to prevent the two parts from gluing together, now seal the gap with monocote, you have to do this to any plane that you are planing to fly at warp 1 to 10 to prevent fluter.

Don't forget to install a good strong servo on the control surface for a 40 size a 545 Hitec is fast, two bearings, and strong enough.

Happy flying.

CARS II

thunderjet

My Feedback: (1)

CarsII Is on the right track I have used just about all hinge methods. The key to no flutter is no slop in the linkages and servo..
.45 and below CA are ok
I really like useing covering as gapless hinges.
Big stuff or Jets The bigest Robarts that will fit. Epoxy or the new polyurathane glues.

My free advice may be worth every penny.
Thunderjet

Zeroman

thunderjet is right,good linkage and a strong servo,also the smallest control services as possible.Doesnt matter that much on what hinges you use, if you get flutter your going to destroy your plane.

Flyboy Dave

My Feedback: (21)

I use CA hinges on most planes....but I use twice as many....keep the gap
real tight, and use clear mono-Kote on the hinge lines. Works for me.

The mono-Kote is all but invisible.

FBD.

der_steuermann

My Feedback: (2)

For the guys and gals exceeding the 200 mph:

Stay away from all kinds of plastic hinges! So far I had best results using heavy duty full metal hinges such as

Ruderscharnier KDH 322 made by KDH-Modellbau, Postfach 2008, 32443 Porta Westfalica, GERMANY

These should NOT be glued with CA but exclusively with 2-components epoxy. A superiour feature are the incorporated barbs supporting safety. Another advantage is the overall height of only 1.5 mm well suited for our thin control surface speed airfoils.

With regards to heavy duty control horns, I make my own custom horns composed of 2.0 to 2.5 mm thick multilayer printed circuit board.

daven

My Feedback: (1)

CA hinges are fine if used properly. If used, the hinge line must be sealed.

My primarly preference are fiberglass skinned hinges. Takes some practice, but work great.

I did a thread on skinned hinges in the Pylon forums a while back. You can see the thread here:

http://www.rcuniverse.com/forum/Skin..._383340/tm.htm

I would be hesitant to use skinned hinges on anything where you need throw of more than 1/4" deflection.

capmike

hey guys,thanks for all the info!! the fiberglass skinnig looks like the best method but I dont have a lot of time to build,so I think ill go with ca hinges with twice as many hinges and clear monokote to seal it. thanks again,
mike

Flyboy Dave

My Feedback: (21)

A little tip....

....I cut strips of paper off some 3X5 cards that fit between the hinges,
That's the spacer for the gap,,,,it's tight. Then after I CA the hinges, I pull
out the strips, and all the extra CA comes out....no stuck hinge lines.

Simple, but effective. [sm=thumbup.gif]

FBD.