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  Air Creation front wheel lean
  - 7 replies in total
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  Tanarg windshields and another reason to get a BioniX wing
  - 2 replies in total
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  What are the advantages of the Tanarg over similar microlights?
  - 6 replies in total
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  check fuel level in flight.
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  Air Creation in Panama
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52 Members...

39 Wall Posts

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  by Chris Wills 1 month ago

  FYI...Russell Holm's 800 psi spec for the struts seems correct. With the regulator set to 800 psi, I bounced the trike so the valves would spring open and up it went right to the stops but not hard enough that I'd be concerned about over inflation.
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  by Bob Thompson 1 month ago

  I need information from Tanarg owners who have the Flycom Focus instrument fitted.
  The manufacturer of the Focus has gone out of business and I am trying to compile a technical document for the use of all of us.
  What I need to know is:
  Does it show your speed in miles or kilometres.
  Height in feet or meters.
  What the jumper positions on the back of the unit are. There are six positions for the jumpers, but mine has only three fitted on the left as you are looking at the back of the unit.
  If you happen to have the instrument panel out (5 screws) could you take a picture of the back and post it here. If that is too much work could you look through the left footwell with a torch and mirror and see what the positions are?
  I will post a picture here with the back of mine shown.
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  by Russell Holm 1 month ago

  I filled my AC Clipper 912 shocks to 55 bar (800PSI). Cost me $6 at a local A&P mechanic shop.
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  by Chris Wills 1 month ago

  I agree Bob that one wouldn't want to soften them up too much. I've put wire ties around the shocks on my previous AC to check the travel and even with a passenger and a "not good" landing they didn't budge off the stops which I think my be a little on the stiff side.
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  by Bob Thompson 1 month ago

  As an ex-aircraft engineer, I can confirm that aircraft use nitrogen in them. I would not want to reduce the pressure in mine as I believe they are designed to protect in the event of a heavy landing rather than give a comfortable taxi ride.
  With a passenger and full fuel you will be exerting 1G on them, but should you have a hard landing at say 3G they may bottom out and do some damage. This is only my opinion and you are, of course, free to male your own choice.
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  by Chris Wills 2 months ago

  Bob,
  On the Fournales link you provided, I had Babelfish translate it then followed the links on in to a pdf. As best I can tell the pressures for ULM applications range for 20 to 50 BAR which is 290-725 p.s.i.
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  by Chris Wills 2 months ago

  Thank you Bob! I knew they were high pressure although 580-1160 p.s.i. is even higher than I thought.
  
  The reason I ask is I had a total "dumb-ass attack" yesterday...My friend and I were drinking a beer in my garage and he was looking at a trike for the first time. He commented on the valve at the top of the shock and when I told him that it probably has 4-500 p.s.i. of nitrogen, he said "no way". Without thinking I put my tire gauge on it. It ruined the gauge and discharged the nitrogen. I was able to get it up enough to fly today by using the nitrogen cylinder from a motorcycle tire plug kit then lowering the other one so they had the same travel when bounced.
  
  Footnote: I've had two AC trikes and always felt the suspension was very harsh and had no "give" even on the worst landings. Today however the suspension felt very nice and supple on landing. The A&P mechanic at the airport where I'm now hangering this trike said he'd be happy to put some nitrogen in them for me the next time I'm out. (The struts of general aviation planes are nitrogen charged) Unless someone reading this has a compelling reason not to, rather than fill them to the point of being as solid as before, we'll fill them so that they are barely fully extended with me in the seat and a full tank of gas. This should provide a nicer ride especially with a passenger.
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  by Bob Thompson 2 months ago

  If you have a look in their catalogue at http://www.fournales.fr/catalogue/Aviation/ULM.htm, it seems to suggest a pressure of 40 to 80 bar, but that is quite a wide range and the document is in French.
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  by Bob Thompson 2 months ago

  The factory don't give any figures for the pressure in them. They are charged at the shock suppliers and should never need charging.
  If it is of any help then they are made by Fournales and the AC part number is R051010. You could try locally to see if there is anywhere that services them, I believe the same make are fitted to many motorcycles.
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  by Chris Wills 2 months ago

  Hi guys,
  
  Does anyone know the nitrogen pressure spec (P.S.I.) for the rear shocks on a Buggy/Clipper/GTbi?
  
  Thanks in advance,
  Chris