If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#13
|
|||
|
|||
Grob Twin Astir getting
On Monday, September 28, 2020 at 11:30:06 AM UTC-4, Michael Opitz wrote:
At 14:12 28 September 2020, Kenn Sebesta wrote: @Steve, that's a great description, I'll go try it with the other direction. My natural slip tendency is to bank left because I'm right handed-- it's easier and more accurate for me to push left than pull right. It happens in lots of gliders, particularly older generation trainers, at least learning in Australia it was part of sideslip approach training. Puchatek's are great for it. It's also in the flight manual (see page 27) The side-slip is quite controllable and, if needed, this manoeuvre can be used for steeper approaches. It is effective by using a 15 degrees angle of sideslip and should be finished of a safe hight (98 km/h; 54 kts; 61 mph). Rudder effect reversal have not been observed. 17 th march 1982 FLIGHT MANUAL GROB G 103 27 The temporary control force to overcome the force reversal or rudder lock is calculated approximately 5 to 6 daN (rudder pressure). The aileron does not change its force direction, rather it returns independently from the full deflected position. Rudder lock can be relieved without pilot input on the rudder. After moving the aileron into neutral position, the Sailplane rolls out of the Slip into wing level position. Thereafter the rudder frees itself from the full deflected position and the force reversal is relieved. Using this method to end the Slip the Sailplane does not adopt unusual flight attitudes and deviates only slightly from its original flight course. That's an excellent reference. It certainly describes what I see, but it's not in our POH (http://www.franconiasoaring.org/pdf- files/Flight%20Manual%20Grob%20103%20Astir%20FH%20Rev%2 09.pdf). I wonder why not? You have a Twin Astir (I) first generation. The above quote is probably from a Twin II manual. Twin I's have a center hinged rudder with no factory seals. IIRC, Twin II's have a side hinged rudder with a tape seal on the hinge side. The rudder on the Twin I can be made noticeably more effective by adding seals with Z tape running just in front of the rudder gap IAW LTB Lindner (Grob certificate holder) Service Letter SL-12. http://www.ltb-lindner.com/service-letter.html Putting seals and Z tape on a Twin Astir rudder costs little in time or materials and yields much better rudder efficacy. I assume that your glider does not yet have this mod, so get it done ASAP. You won't be sorry, and you won't be complaining about a small and ineffective rudder anymore. RO Michael, how we can make seat in the back more comfortable ? There is pure torture in the back seat of our ACA Twin Astir now . Thx Ryszard |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
FS: 1979 Grob Twin Astir | [email protected] | Soaring | 1 | March 9th 17 08:58 PM |
Grob Twin Astir | K m | Soaring | 42 | October 11th 16 07:54 PM |
For sale: Grob Twin Astir | [email protected] | Soaring | 3 | April 8th 14 05:29 PM |
Tailwheel For GROB Twin Astir | Mike J. | Soaring | 2 | December 3rd 12 04:49 PM |
Grob Twin Astir Tailshaking | Peter | Soaring | 11 | January 14th 07 11:54 PM |