Jumpingjack

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Posts posted by Jumpingjack

  2. Posted

    I would like some sort of test prop for when I put the Jab on a test stand.  This warp drive doesn't sound like it will work in that case either.  By the way the cylinders do have some corrosion after borescoping yesterday. I will be pulling and hone them. Probably due some updates then.

     

  9. Posted

    Like to just get what you guys spin. Proven experience is key from you guys,  I'm learning here. Doesn't sound like Warp drive is very friendly to Jabiru owners. Nick at Arion, Jabiru supplier says he sells Sensitech. Not sure.

    Tjay, I got a quote from Norman at Luga for your prop size you sent me.  

    I think something ground adjustable would be good but like Jim said wood is nice.  Not sure.  Buy both and find out $$$.

    Thanks

    Jack

  10. Posted

    I have a 64" two blade warp drive on my Avid.  For a while Jabiru only wanted people to use a wood prop on their engines.  Last time I talked to Darrell about it, he said he would sell me a prop for it.  I did get one blade from him to replaced the broken one after the crash and repair.  I also have a couple of 66" taper tip blades that I ran on the plane for a bit.  Better cruise speed, and less climb so I went back to the 64" square tip ones.  What hub do you have with the warp?  Doubt you want to use a three blade on the Jab, and I'm thinking the cheapest hub warp makes is not strong enough for the Jabiru pulsations.  JImChuk

    I think its a HPL-R three blade hub.  Going by warp drives downloads. 

    Its 54 inch.

    Prop was just some parts there when I bought the engine.  Gave a small price to throw it into the deal.

     

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  11. Posted


    68 inch Luga is what I got.  When I first started out I wanted to keep it simple and get a warp drive but Daryl would not sell me one for the Jabiru. So I bought a 64 44 Tennessee which was to much prop for mine.  But did get the bird flying I would also like to try a Culver someday but for now I love the Luga, hate the time it takes to get one but love the prop.

    I bought the jabiru 2200 and also a Warp Drive 3 blade prop the guy had. The diameter is to small and need longer blades.  Curious why Warp Drive wouldn't sell prop for a Jabiru ?

  12. Posted

    John,

    I know this is post is from last year but do you still have the Jabiru  mount?  I'm hopefully picking up a gen1 engine today and need one or drawing.

    Thanks

    Jack

     

  13. Posted

    JimChuk

    Going tomorrow to pick it up 

    SN A1230.  Just fishing here to see what props you guys are running  and looking for a motor mount.  

    Working now so chat is short.  Got many more questions later.

    Jack

  14. Posted · Edited by Jumpingjack

    Going to purchase a Jabiru 2200 for my C model HH and wondering what prop you folks are running?  

    Also looking for early jabiru 2200 engine mount for C model or drawing maybe?

  15. Posted

    I was looking at the 3 blades on the Luga site.  Your using two blade,  cool.

    The engine Im picking up is a crate gen 1.  Yes been setting a while and I have to go through it and put on test stand to run a while.  I will need another "test" prop if the wait time is 8 months.  If not longer due to this covid stuff.  I will contact Luga if your happy with it.

    I had a discussion with Nick, Arion Aircraft he suggested Sensitech.  

    Thanks!

     

  20. Posted

    I need to ask basically the same question about fusalge paint Avid used on my C Model. Mine has some surface rust that needs touched up. Any help on color and manufacturer of epoxy used?

  21. Posted

    I doubt that you would have to offset the mount that much to over come the VS being at an angle, I'm sure the fuselage has some effect on where the plane points, but if seems the easiest thing to do would be to move the VS to being centered.  Then maybe all you will end up needing is a small trim tab.  And it's anybody's guess which side of the rudder you will be putting it on. The Avid MK IV had the VS centered, and lots of them (most probably to start with) were fitted with a 582.  (Left hand prop.)   Mine was, and I went to a Jabiru engine (right hand prop) and never gave the VS a thought.  I did have a factory built motor mount though.  Never shimmed it and I do have a trim tab on the rudder, and it flys just fine.  Little over an hour this evening in fact...  :-)  JImChuk

    JimChuk,

    I guess I'm looking for a member with a C model that has done the mod, and running a Jab or 912, before and after results. And was the effort worth it.

    I also want to upgrade tail feathers to MK IV while I'm at it.  

    Thanks, Jumpingjack

     

     

  23. Posted

    So I ran two string lines from the VS to estimate where shiming the mount would need to be , one sting is centerline and the other is parallel with the offset VS.

    I don't have an engine or mount so I used two strips of plywood and extended 23 inches, from firewall to guesstimate prop flang location, and come up with    4.92 in from center to offset. That looks to be the amount need to shim to be inline with the VS.

    I think centering the VS would reduce drag.

    Learning stuff here,  any thoughts appreciated.

  24. Posted · Edited by Jumpingjack

    I would like to center the vertical stabilizer (remove offset) on my C Model for installing a four stroke CW rotation engine Jabiru or 912 Rotax. Don't think i want trim tabs to make up for it.  Also, not sure about shiming the motor mount to compensate.

    Any tips would be greatly appreciated!

    First has anyone done it?

    Second is it worth it 

  25. Posted

    Pascal,

    Thank you for your very common sense approach to engine options. A bolt in safe proven option would be my first choice so the rotax 912 would be it.  This is the engine the manufacturers of ready to fly light Sport aircraft are using hands down. I witnessed this at Sun n Fun last year.  

    With the 912 I shouldn't have to do all the fuselage mods and keep it as designed. 

    As you say and one of my biggest concerns is my airstrip with trees at each end.  Proven reliability of the 912 would ease my concerns considerably.

    Again thanks fo your advice!

    Jack