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  1. Mike G

    Some thoughts on cross wind takeoffs.

    Jean Claude Thanks, I know the engine isn't too bad I did a leak test and all cylinders are still remarkably tight. I have the DUC Windspoon, I wonder if Javaprop could simulate that? Mike G
  2. Mike G

    Gyro Warning System

    I am putting together a presentation for my GWS (Gyro Warning System) and want to illustrate each of the accident scenarios that the GWS covers with a video of a crash. I have reasonable videos for most but does anyone have a decent video of a flapping (blade sailing) crash? I have found this...
  3. Mike G

    Some thoughts on cross wind takeoffs.

    John (Burrengyro) and Jean Claude If (as I suspect) JC's calculations are somewhat based on the results of my testing, don't forget that I go to WOT as soon as I release the pre-rotator and bring the stick back. If John's TO procedure is "I often advance the throttle to WOT within 25m of the...
  4. Mike G

    Visit to Fraundorfer Aeronautics.

    Kevin I have no information regarding Fraundorfer implication with DiNelly but from what we've seen on social media DiNelly is not considered very reliable. As I said most of the guys I met came from Eurocopter which plays in a different league to DiNelly. I visited Arrowcopter factory a few...
  5. Mike G

    Some thoughts on cross wind takeoffs.

    John (Burrengyro) The correction for the standard ELA pitot on my 07 was TAS = 0.8793 x IAS - 0.6279 (kph), not CAS, sorry my mistake. The correction for CAS on the day was +2.5 kph, so CAS nearer 90% of IAS, my 85% was from memory. This is because the static port is behind the instrument panel...
  6. Mike G

    Visit to Fraundorfer Aeronautics.

    This https://www.easa.europa.eu/sites/default/files/dfu/ToR%20RMT.0731%20Issue%202.pdf might help open the door for pilots to log hours in non ultralight gyros. Mike
  7. Mike G

    Visit to Fraundorfer Aeronautics.

    Some news abut these guys. https://www.flyer.co.uk/tensor-600x-gyrocopter-launched-at-european-rotors/?fbclid=IwAR2XGlolbko5WAllXxT8PmWY8SbvuvG6pU2bKU5ja6DReiezAVyJXZCr7_M
  8. Mike G

    Some thoughts on cross wind takeoffs.

    Dave When testing my GWS, I record: Airspeed with a calibrated differential pressure sensor connected to a commercial pitot static probe. Calibration using 3 triangular GPS flights and DA correction to establish TAS. The standard ASI on my open cockpit ELA had an 85% error between CAS and IAS...
  9. Mike G

    Fatal - Cavalon G-CKYT, Scotland, UK

    What maneuver does the engineering side of the AAIB (or anyone) suggest could cause an overload high enough to separate the rotor head from the rest of the gyro? Mike G
  10. Mike G

    Some thoughts on cross wind takeoffs.

    Fara What advantage do you get by tilting the rotor slightly into wind at the beginning of pre rotation? Mike G
  11. Mike G

    Some thoughts on cross wind takeoffs.

    Jeff Thank you, I couldn't find it with this new forum. I think my post 48 explains what JC is telling us. I can confirm what he says, when testing the GWS with the stick back and hard into a cross wind with "normal" pre rotation Rrpm the GWS gives me a flapping risk warning due to the slow...
  12. Mike G

    Some thoughts on cross wind takeoffs.

    I seem to remember we've had this discussion before but I can't find the thread. Mike G
  13. Mike G

    Low G and Rrpm decay rate

    Doug As you can see it's not very aggressive but I was trying to maintain 0.6 g with a relatively fixed stick. You end up having to pull back because you're heading for the ground.
  14. Mike G

    Low G and Rrpm decay rate

    Tyger You have to remember that these recordings are from a device that is designed simply to give the pilot advanced warnings of a potential blade flap, behind the curve or bunting scenario. The recordings are strictly for post accident (black box) analysis where this lag probably wouldn’t be...
  15. Mike G

    Low G and Rrpm decay rate

    Doug could you be more specific when you say: "In terms of Mike G's curves, such a gyro would show a recovery of RRPM and G-load with the stick locked." Stick locked in which position? I'm not promising to try it but if it's feasible I might. Tyger You are not misreading the graph, you are...
  16. Mike G

    Low G and Rrpm decay rate

    Just for you Tyger, the G value is read off the left hand axis as 100 times g, so 2 g = 200 etc. The aim of these trials was to simulate a"typical" bunt where the pilot zoom climbs and pushes over as seen in Japanese video on YouTube. We're using the Rrpm decay rate as one of the parameters for...
  17. Mike G

    Low G and Rrpm decay rate

    Doug Riley asked on a previous thread, that I cannot find, about rotor rpm decay rate as a function of low G. Here is an actual recording using my GWS system during recent bunting trials. G is read on the left axis and rate of change of Rrpm on the right. You can see that at a sustained 0.6 G...
  18. Mike G

    Does stick shake get weaker with flight time?

    Xavier If you’ve read any of my ramblings about vibration you’ll know what my first question will be. What frequency, 1/rev or 2/rev?? I know I’m repeating myself yet again but without knowing which frequency we’re talking about discussions about vibration tend to be meaningless. If it’s...
  19. Mike G

    Fatal - Magni M24 near Butzbach, Germany

    Rick E https://www.facebook.com/groups/234009751225374/permalink/514679023158444/ This guy Luca Vanzin has developed impact resistant tanks for the ELA 07 and his own very lightweight single seat gyro. You can contact him here Gyroflyng 360 è WT safety tanks precision and safety...
  20. Mike G

    American Ranger AR-1 gyroplane takes a short cut over the hill and through the canyon...

    Peter I'm really impressed by the lack of camera shake in your video. I'm trying to record videos of flapping and behind the curve take offs and my videos are really poor compared to yours. What system are you using and how are you mounting the camera? I agree with Abid, you could do with some...
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