ORIGINAL: doxilia
Cees,
the single center actuated system where the elevator halves are joined (CL flap style) is an elegant solution in some cases. This of course, is for those who desire no independent trim adjustment.
The main problem I see with this system though is that with glass fuses, maintenance is basically non-existent. Because the installation of this system requires you to first pass the joined elevators through the stab opening, then link up and finally followed by the stab itself, once you lock the stab in position there is no access to the linkage. I suppose one can argue that if done properly one needs no access to the linkage but if for whatever reason you did - you would find yourself in one of those [:-] situations - if you know what I mean.
For wood fuses, it would be simple enough to build in a maintenance hatch as is done on several scale models using this system.
David.
David,
My step by step thinking.
1 I always did want me to see in one situation and that is on top of the podium. Only play the game when you want to win the match and for that use all the tricks. There already are enough limitation, dimensions, power, weight, accessories.
2 No levers with pivots, links, piano wire etc visible if it isn’t strictly needed. We are not creating a Christmas tree with whistles and bells, it’s all drag and disturbing of flow. Keep your money in the pocket so another cannot buy a tree himself either.
3 Only use the best system you can make not buy..
Trimming is for people that cannot built straight, strong and symmetrical,
When trimming is not structural needed the system also cannot misalign. I can hang 1,1 kg on the TE of one aileron without a problem, that is the quarter of the weight of the total plane! When you cannot do this with your plane it is too fragile to use outside in the contest. The enemy will misalign your elevator when you are not careful!
4 Do you see a hatch in the gearbox of the steering system of your car, in a servo? No needed anymore in 2010 when using the right materials.
5 Less components less troubles, one good servo in the centre of gravity.
6 There are only 2 pivots in my system and none of them misalign the stab halves, in a two servo system there are 4 and the play of all do misalign the halves.
7 If I want I can use a ball bearing in that single pivot, Why not we all are talking about BB?
8 Servo speed? Nonsense, synchronization of the halve that’s what counts and is much more important.
9 And if you really want to win? You can mount it in a glass fuselage too see the step by step picture.
If you want a try-out, we can help you and show much more details.
Look for example this post:
http://www.rcuniverse.com/forum/fb.asp?m=8051076
or this
http://www.rcuniverse.com/forum/fb.asp?m=8056770
Cees