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Everything posted by Jenki

  1. Jenki added a post in a topic MATCO Tail wheel shimmy   

    Thank you very much. Better to have more answers than not know what is exactly going on.
    I need to check it, better say, I will ask manufacturer as I am reaching 200 hours for inspection. I will ask for both, check of caster angle and U-strap settings (resistive damping).
    It will be the last mandatory inspection (2 years since manufacture date) so they will do complete check. I didn't fly Bristell since 9th September till 5th December now (nearly 3 months) due to starter clutch repair (I am using old ROTAX 912) so I missed good or at least suitable weather here to fly to manufacture. Till the inspection it is still under warranty period and I need to be ready to bring all findings to solve.
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  2. Jenki added a post in a topic MATCO Tail wheel shimmy   

    Problem with not enough "resistive damping" could be caused by missing "silentblock" or sort of flexible material inside U-strap in my case I think.
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  3. Jenki added a post in a topic MATCO Tail wheel shimmy   

    Oh, thank you, we call this spring washer, split lock washer ... now I understand
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  4. Jenki added a post in a topic MATCO Tail wheel shimmy   

    Sorry, can you explain more deeply "resistive damping" ?
    I am not native so even "belleville" washers are something I don't know exactly ...
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  5. Jenki added a post in a topic MATCO Tail wheel shimmy   

    I am trying to find detail ... but nothing better then this

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  6. Jenki added a post in a topic MATCO Tail wheel shimmy   

    Maybe you can recognize system how tail spring is fixed to fuselage.

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  7. Jenki added a post in a topic MATCO Tail wheel shimmy   

    Well, thank you very much friends.
    This is something pushing this forum forward - sharing ideas and experience.
    My tail wheel is pretty COTS but I don't exactly know about tail spring and setup//geometry of this part. There is U-strap as well (No. 6 on my picture) where is free space (real clearance about 10 mm/0.4") in between fuselage and tail spring. It seems not correct for me, I would expect sort seal (sort of rubber? or elastic material ) there as spacer to damp vibrations. One more observation is that there is only one fix point of tail spring - bolt (pin) and U-strap without sort of spacer is leaving free motion up and down for spring.
    I will check caster angle definitely anyway.
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  8. Jenki added a post in a topic MATCO Tail wheel shimmy   

    I think I understand, but ... maybe any hand drawing could be big help.
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  9. Jenki added a post in a topic MATCO Tail wheel shimmy   

    Thank you friends,
    I will try and let you know. For now, bad weather, rainy/snowing a little, freezing, low clouds ... no way to try now.
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  10. Jenki added a topic in Technical tasks   

    MATCO Tail wheel shimmy
    Dear friends,
    I am no more Avid/Fox breed owner as you already know, but my Bristell is tail dragger as well. Tail wheel used is MATCO light weight version of the dual fork eight inch tail wheel WHLT- 8LD installed as full swiveling version, mounted on dual steel spring. (see picture below)
    During one year of operations (mostly on paved RWY) I am facing troubles with strong shimmy vibrations in the case of three-pointer landing (not often, rather on mains) or in the case I am putting tail to ground soon after landing.
    I would like to know what could be o reason for such vibrations.
    Thank you for any opinion

    • 32 replies
  11. Jenki added a post in a topic SKYPER GT9 - new bird in the hands   

    Hi everybody,
    a little more news regarding Skyper GT9. I just finished "user test"period. We had unusual long and dry autumn here, nice weather till last Sunday. Rainy, cloudy wet ... damp since then. I've flown on Sunday just till the low clouds and rain reached my airstrip.
    Interesting bird this Skyper. All metal and unusual combination of classic tubular construction of cockpit cage and engine compartment covered by composite cover (matter of good aerodynamics), all-metal semi-monocoque structure of wings and tail cone including tail feathering. Sturdy compact construction. Wing has sweep-forward 3 degree. BRS equipped. Operational speed range 60 KIAS to 119 KIAS, VNE = 145 KIAS, touch down even less 40 knots. Huge windows, closed cockpit, no wind blow. A little lazy on ailerons, very agile on elevator. Sturdy landing gear with good manners, steering on front wheel. STOL definitely, but ... Unfortunately, no taildragger version is available   What else ... clever and speedy traveler (up to 540 NM), excellent for aerial photography, observation, whatever. I would recommend yoke rather then stick for control ... but who knows if manufacturer will listen. Some pictures for you...

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  12. Jenki added a post in a topic High Sierra Fly In pics   

    once ... it will happen. I will go there, definitely. I hope.
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  13. Jenki added a post in a topic Belite Chipper Down   

    Hi, everybody, do we have more information about this accident?
    It could be very interesting to know more for everybody.
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  14. Jenki added a post in a topic Skycruiser   

    Hi everybody, anything new about this aircraft?
    As far as I know, importer doesn't penetrate market with such price for this aircraft ... even though it is definitely not "flimsy" solution, significantly more robust then Avid I've seen here. Producer doesn't acquire essential skills for such production because they are producing all-metal SportCruiser. Only one piece produced with support from original manufacturer that is all.
    We have some aircraft around from original production and original name STYLUS. I personally know 5 of them, 3 are trike-gear and 2 are tail-draggers, flying a lot. One is suffering by cracks on engine mount ( oldest one, old type of engine mount construction, 100HP Rotax ) others are in good shape, one is more then 2000 hours now. The closest is parking in the same hangar as I am, about 800 hours on clock now, but trike gear ...
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  15. Jenki added a post in a topic Introduction...Jenki from Slovakia/EU   

    Hi friends,
    time is running fast, I have some news regarding plane (though it is no more /for now/ shoulder-wing with Avid heritage) I am flying now.
    As it was my dream to go back to taildragger, so I've made a decision. There is no too much shoulder-wings on the market here, unfortunately.
    My plane is now Bristell TDO, long wing version (29,95 ft), sort of speedy all-metal plane in this category. I am keeping still STOL and rough field capability though there are certain limitations related to low-wing concept but main limitation is low position of tail feathering definitely. Cruising speed 100 - 110 kts is nice advantage (Rotax 912 @ 5000 rpm), roomy cockpit, 2x 20kg/44pounds baggage boxes in the wings, 15kg/35pounds in the back part of cockpit. Wheels are 6" low pressure due to rough terrain capability.

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  16. Jenki added a post in a topic Aircraft for backcountry from Europe ...   

    Hi everybody,
    recently I've found interesting video from altiporto Chamois in Italian Alps (altitude 5.811 ft)

    The point is that there was aircraft Parrot Land Anywhere flying / sort of interesting solution, have a look:

    It looks like sort of new solution for landing gear, suitable for STOL operations, isn't it?
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  17. Jenki added a topic in For Sale and wanted, you got it, I want it   

    New aviation marketplace ...WingSwap?
    It looks like new aviation marketplace for you, isn't it?
    Too far for me probably but looks nice.
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  18. Jenki added a post in a topic Mountains flights on the trip - New Zealand   

    It was nearly standard trip, probably "everyday bread" for him, but I have complete record of track in may iPad/Air Navigation Pro app.
    I hope to go back in future to spend more time flying - beautiful country.
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  19. Jenki added a topic in Avid fox flyers pics and vids   

    Mountains flights on the trip - New Zealand
    Dear friends,
    this is not Avid or Fox flying but I decided to share this video I took in March at the end of my business trip through New Zealand. My job is ATC systems (Air Traffic Control Systems) development and support so I had opportunity to work for AirNav New Zealand shortly. I finished my trip there by excellent flights to Milford Sound and back to Queenstown. Beautifull mountains, clever pilot - strong memories for me. I have only iPhone video but still nice enough.
    and second part
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  20. Jenki added a topic in "other aircraft your working on"   

    SKYPER GT9 - new bird in the hands
    Hi friends,
    I have new toy in the hands for "customer test" ordered by aviation magazine here.
    Even though I have now Bristell, I am still sort of addicted to shoulder wing planes. This SKYPER is all-metal aircraft, very light, just 285kg /  628 lbs empty , but MTOW is 600kg/1322 lbs.
    What is unusual for me is quite high speed for cruising available, probably due to wing profile. I had only "first date" just no more the 2 hours in the air and 8 landings. Engine is standard ROTAX 912 / 100HP and origin of the aircraft is UL category 475kg/1047 lbs now enhanced to LSA level.

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  21. Jenki added a post in a topic BIG NEWS AGAIN - Avid TurboProp   

    I will do my best, for now, no more info from producer ...
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  22. Jenki added a post in a topic BIG NEWS AGAIN - Avid TurboProp   

    STV 100 HP  diesel fuel, 27kg per hour (+145 gram per hour turbine oil), weight 28kg
    STV 130 HP diesel fuel 32kg per hour (+145 gram per hour turbine oil) weight 30kg
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  23. Jenki added a post in a topic BIG NEWS AGAIN - Avid TurboProp   

    I will do my best
    but you know, they are informing just ocasionally
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  24. Jenki added a topic in Avidfoxflyers General Hangar   

    BIG NEWS AGAIN - Avid TurboProp
    Dear friends,
    a little surprising information for me, but definitely big new for AVID community:
    AVID TurboProp is reality in Europe.
    Company Stuttgart Engineering developed STV-100 shaft-turbine engine for light aircraft - it is already known information for a while. They are working on 100HP and 130 HP variants of completely new engines.
    Surprise is that they decided for first installation on AVID aircraft    I have no more news or data, just a few pictures I am sharing with you for now. Enjoy

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  25. Jenki added a post in a topic Aircraft for backcountry from Europe ...   

    ... and this is the aircraft from my dreams ...

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