BPFlyer
Senior Heliman
Location: Wichita, KS
| Guess you will have to take up that argument with the folks that developed the Vstabi System.
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| Step 1: Rigid Rotor Head
In order to work properly VBar needs a perfect set up rigid rotor head. For Mikado pilots it is straightforward. Simply install the Mikado rigid rotor head (see also Mikado Logo Series); you may skip this chapter. Other helicopter models might need more work like it is described in Mechanical Setup and Conversion of other helis.
The goal is to get a very stiff and slop-free linkage from the swash to the head using complete servo travel to get rational cyclic and collective pitch throws.
Basicly all throws, travels, linkages and lever arms had to be optimized for a flybarless (rigid) head. Additional are there some things to consider for conversion of a flybar head.
A rigid setup makes any mechanical system more responsive and more importantly, more accurate. The sensors must be able to detect even the slightest movement so the computer can make a correction before you (as a pilot) would ever notice it. A soft connection results in numb feedback for the sensors. Since the VStabi is 100% programmable and "fly by wire", a rigid setup does not necessarily translate to being overly sensetive since flight behavior is programmable. A very rigid setup can still fly very easily and smoothly without any hint of being touchy or unstable. With VStabi, both 3D and scale helis of any size will benefit from a stiff rotorhead and blades.
Repeated in another set up section: The target of the conversion is to get a really stiff and free from play linkage to the head under use of the complete servo travel and getting rational zyclic and collective pitch throws.
Which main head is useable for VStabi?
The heli has to response quick and direct to steering inputs. Therefore it may be useful to chose the rotorhead, dampeners and main blades depending on this fact. A hard and playless setup form the whole system will work much better with VStabi than a soft setup with play in the linkages.
This will have most effect on big scale helis that have normally a very soft setup for use with flybarless heads. You will get much better performance under use of hard and light main blades and hard dampeners. This will be much better for getting less ocillation.
The maximum hardness is only limited by the ground resonance while powering up/down the system before/after flight.
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Fly it like you stole it! |
set high into a drill press with an x-y table on it. It cut centered perfectly on the practice shaft and on the real one. Then used a hacksaw and grinder to remove the extra stock. With the tools mentioned above it was easy, I would certainly not cross drill freehand with a handdrill.
