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MBB Bo 105

10 bytes removed, 18:51, 18 October 2016
Realism: grammar & tidying
The Bo105-model has one of the most accurate a very realistic fdm regarding flight handling, based on collected detailed data of the Bo105 from NASA-flight tests, flight manuals, pilots and published scientific data from various sources. Due to its unique flight character, and its nature of being a helicopter, there had have been some false assumptions about the realism in the past by many users, including its current maintainer.
Though the BO105 was the first helicopter with a rigid rotor head, the civilian version had never been eqipped equipped with any flight-control assistence assistance like SAS or autopilot. The only flight-control assistence assistance installed is a ForceTrim System force trim system by Springloadingspring-loading. Only the military versions BO105 M-P, especially the armed versions, have a YAW-SAS to keep the helicopter better in place while aiming and shooting.
What is confusing to many users is, that they have to pull the stick quite back to hover the helicopter. This 45% back cyclic is completly realistic on the BO105 and these are real values, obtained from two independant sources. Depending on CoG, loads, and flight states the position of the cyclic will vary a lot anyway, so a 0% cyclic at lift-off would make problems on other flight states like fast cruise.
The problem behind this is that the rigging of the controls of real helicopters are mostly not symmetrical like the joysticks we use. So the problem is on the hadware side, since realistic and affordable helicopter sim controls are rare. Especially the ForceTrimSystem The force trim system can't be simulated 100% realisticrealistically, and would also need corresponding hardware for, which does not exist yet.
To counteract help with this FGFS this comes with a generic AutoTrim-function. It can be implemented to in every aircraft (See Generic/Nasal/aircraft.nas). The Bo105 makes use of it by pressing | {{key press|]}} while moving the joystick. It has similar effect for joystick-users like a real AutoTrim/ForceTrim-System. Unfortunately it works on the pedals as well, which is unrealistic.
The only thing which makes the BO105 not 100% realistic as it could be are the known YASim-issues and the unrealistic underpowered flightperfomance, as it should have a climbrate twice the size.

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