CorsairJock
Posts: 1937
Joined: 4/14/2002
From: Parchment,
MI, USA
Status: offline
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quote:
do you have any reservations about the snap-on ball links used on the aileron servo?
I assume you are talking single servo (for ailerons) setup? If so, that is the setup (with ball link) I have on my current Top Flite Coirsar, and never had any problems with it popping of. You just want to be sure there isn't any upward forces on the linkages coonected to the ball, as in something that may apply pressure which would tend to force the ball off.
I used a simular setup on my old DynaFlite Corsair, and never has any problems with that one either (with over 1,000 flights, and several 'mishaps').
quote:
the aileron which goes up has more deflection then the one which goes down.
This is reffered to as aileron differential. And probably the main reason most aircraft have it is because there is more pressure on the underside of the wing than on the top (hence: lift). If the ailerons traveled the same amount, the extra pressure would induce more drag on the aileron going down, thus inducing a tendancy to yaw to the side which has the lowered aileron. This yaw then, is in the opposite direction of the intened bank. Maybe OK for some acrobatic manuvers, but not if you want to make a good turn in the direction you are banking.
Aileron differential can be obtained using a single servo also, using one or more methods. One method is to use 2 ball links on the aileron servo, so thatneither are centered when the servo is neutral. If the bellcranks or installed with the connecting arm outboard (instead of inboard), this will give the ailerons more up travel and less down travel.
And, now we have brought up the 1 servo vs. 2 servo aileron setup argument.
I have built planes both ways, and generally prefer the single servo setup because it is lighter, cheaper, less complicated to install. Many (most) times, having a dual servo setup requires additional servo extensions as well, adding still more cost and weight.
I do however, now prefer the dual servo setup in Corsairs 1/8 scale and larger. Main reason being: it's difficult to get a good, slop free linkage going thru those bent wings.
I've also detected both ailerons either dropping slightly OR raising slightly, due to temperature variations and resulting thermal expansions characteristics oy NyRods. It is very minimal, and the temp changes I am referring to is like when one day it's 72 degrees and the next day it's 90 and humid.
This has me favoring the short linkages which can only be obtained with a dual servo setup
But, like I said, my current one has the single servo setup and it continues to work out pretty good.
As for the flaps: my current one has 2 flaps standard servos (Futaba S3004), but I really wanted to use just one (Hi Torque). I just found it easier to install 2 (I got lazy/ impatient). Again, those bent wings sure make linkages complicated.
Had a GREAT TIME at the C.A.R.D.S. "Warbirds over Grand Ledge" this past weekend, saw a lot af really great looking aircraft flying (too many to single out some), and I flew 3 of my Corsairs (Top Flite, Wattage electric, Flying Styro micro electric).
Thanks to the C.A.R.D.S. for having a great flying site, and hosting this event.
< Message edited by CorsairJock -- 6/7/2004 8:46:04 AM >
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Avatar: Electric Powered, Highly Modified Hangar 9 Corsair
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RE: 1/8 scale TopFlite Corsair Mods - 
RE: 1/8 scale TopFlite Corsair Mods - 
