I don't know abo about Raf 2000 but I know a bit gyros (being an home builder trier myself)
you'll certainly know 100 % of what I will say but I'll but l'ill repreat it just in case
the goal of hanging a giro and placing the rotor head at an horizontal point so that the gyro noses down to at least 8° is to simulate the rotor lift (that does not exist when you are performing the hang test) .
when you will fly the rotor lift will "pull" your giro and bring it back to a virtually a horizontal attitude, hanging is a pragmatic method
if you don't give you gyro at least 8° nose down during the hanging you risk to fly nose up and if you are too much nose up it is possible that event with the stick fully ahead at the dashboard your gyro won't be able to pitch nose down at a sufficient angle to land properly and you will be forced to land using the engine reducing the engine thrust ( which leans that if your engine stops you will land nearly vertically and crash)....
in france on a gyro 2 guys I know have mounted a 30 kilos heavier engine then the original engine resulting in a 4° nose down angle at the hanging test ...
pb is that they were saying ... there are other gyros like mine with the same engine and they did not modified the cheek plates ...
one of the 2 crashed the gyro ( bending the drop keel tube), and the other hardly crashed ... they were reluctant to change set a correct angle and change the cheek plates.
I advice you to make new cheek plate and set the angle at least at 8°, if the angle appears to be to important the only consequence is that you will fligh a bit nose down which is not a proble because you still be able to land (you won't get to your control stops)
you have to know that most of the time if you want to tune perfectly your gyro so that it flie perfectly horizontal you will have to change you cheek plates a couple of times until you get the perfect attitude of your gyro at cruise speed ..
if you have modified you gyro it is normal that you have to correct the rotor head position in comparison with the other raf2000
Thanks for your feedback. I have heard of others who either added weight up in the nose of the aircraft, or else the pilot was very heavy and facilitated the proper balance. I just had not heard of others building new cheek plates with different balance attachments. Good to hear your success.
To all of you that have moved your axle aft, how has it really effected the take off run, and the landing ? how many inch's did you move the axle,was it worth the trouble ? is it easier to control on take off,i have the 230hp turbo charged 2.5 and my take offs are hard to control, i have...
I was thinking about cheek plates as a common mean of shifting the rotor head backward and forward in order to reach the right hanging angle but obviously the RAF 2000 rotor head is not mounted on cheek plates and you are not going to built cheek plates where they don't exist now on this gyro
if your raf owners counter parts have achieved 5° to 10 ° you should find out why it is not the same for you,
not easy to modify a gyro as a matter of fact .
ins't it possible to lean the mast back a couple of degrees more ? or is the position one the maximum possible angle ?
The RAF has two plates, one on each side of the upper mast, that the rotor head is mounted to. There are two bolts holding these plates on - an upper bolt and a lower bolt. By shifting the hole fore or aft on either of the bolts will shift the angle of the rotor head. These are the plates I was referring to as the cheek plates. By changing the angle of these plates to lean the rotor head assembly back will change the balance of the hang test.
My guess is that several people have done this, but I'm just not reading or hearing about it. Most I have talked to have just added lead weight in the nose of the aircraft.