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  1. C

    I found a plane that's been de-registered, Now what?

    Hello friends. The owner of the plane that I found has died and the registration has been expired , plane was de-registered. The plane was an experimental homebuilt. Is there a way to get it registered again? What is the procedure? Thank you.
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    Where can I learn from on how to build laminated spar?

    Hello friends. I am looking for some information on how to build a laminated spar. I am interested to learn if there is any kind of official documentation pertaining to number of plies and gluing technique, thickness of plies and any other recommendations. Any help is greatly appreciated!
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    Spark plug question

    Hello friends. What can cause a ground electrode pitting like this? It came out of two stroke on my friend's plane.
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    SOLD: 94 Quad City Challenger in Mississipp, 503 DCDI in a very good shape $7500

    Hello guys. Time came for me to part with one of my birds. For sale I got a 1994 quad city challenger powered by a 100 hour rotax 503 with dual carb dual plugs. Plane starts good, runs good and flies good too. The empty weight is 433 lbs. Cruise 70-75. Vne is 90. I like to pull the power back...
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    Aftermarket valves for 912?

    Hey guys. I would like to replace exhaust valves on my 912. I looked at cps and leaf websites just to find those SOB's are $300+ ea! Ridiculous! Does anyone know any sources for the aftermarket valves? Or I should start by asking is it even possible to find aftermarket parts for the rotax 912?
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    Chotia Weedhopper true legal ultralight in central MS

    hey guys. I got a clean, good looking true ultralight Weedhopper for sale for $3000 The Weedhopper is powered by Rotax 447 that runs strong. It's a SCSI but like I said it flies great! The sails are in excellent shape because plane spent most of it's time in a dark enclosed hangar. Plane flies...
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    What's stronger for the spar : two thin tubes or 1 thicker tube?

    Howdy! The topic is pretty much self explanatory. I am wondering, for the wing spar would it be better to use a double walled tube of combined thickness of 0.107" or single wall tube of the same diameter but 0.138 thickness. The tubes are 2" and will be used for the wing spar. Please share your...
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    6061T6 vs 4130 pushrods on Challenger 2

    Hello folks. I have a question regarding the aluminum vs steel tube for the elevator push tubes. I have a challenger 2 and a push tubes for the elevator are made of 1/2" aluminum 0.035 wall 6061T6 . The tube I currently got is somewhat flexible and don't seem to be rigid enough. I want to...
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    Please help to find the name of the aircraft.

    Hello guys. Few years back I came across an experimental two seat design and the guy also was selling plans for a VW re-drive that would go with that plane. I think it was a steel fuselage and fabric airplane and for the life of me I can not recall the name of it. I know it's a long shot but...
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    Where to buy viton seals for Rotax 503?

    Hello. I was wondering if anybody have any leads on where to buy an aftermarket viton seals for Rotax 503? Thank you!
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    How to find out the year my Rotax 503 engine was made?

    Hello. I am rebuilding a rotax 503 and am in need of finding the year make. Is there any definite way to find out by the serial number when my engine was made? Also, are 503 UL crankshafts interchangeable with ski doo 503's crankshafts? Thank you
  12. C

    What size of the Rotax 503 cooling fan belt is?

    Hi there. I want to replace the fan belt on my 503 as a precaution and I would love to have one ready when I take my old one off. Could anyone please tell me what size of the v-belt do I need to get ? I would love the Gates brand. Thank you
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    Where to find affordable parts for bing 54 carb?

    Hello folks. Where would one go to find a cheaper replacement parts for a bing carburetor? My bing 54 carb that is installed on Rotax 503 started puking the fuel from the vent right after the landing! I think I need a new floats and Aircraft spruce wants $80 plus shipping for float (two...
  14. C

    Does anybody have a cutout template for Grand Rapids EIS ?

    Hello folks. I am laying out the panel for my friend and I need a fulll size cutout for grand rapids EIS. Does anybody have a full size template? Thanks.
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    Where to buy a cheap metal tag for experimental aircraft?

    Hello friends. My friend is getting my plane ready for conditional inspection and we need a metal tag made with name, model and serial number of the craft. I saw some tags on spruce website but they aren't offering engraving them with data. Was wondering maybe somebody knew where to have one...
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    How far on the exhaust manifold should probe go

    Hello. My Rotax 503 had only one EGT probe. Somebody told me that probes should be positioned a certain distance from the block so I wanted to find out for sure how far from the exhaust manifold should the probe be placed? It's a clamp-on probe that goes in the drilled hole. Anyone knows for...
  17. C

    Where to find a reasonably priced new Bing 54 carbs for Rotax 503?

    The topic is pretty much sums it up. I need to replace both bing 54 carbs on a Rotax 503. Aircraft Spruce wants $380 each+ shipping. I was wondering if there are any other places/applications/sellers where I can find the same carb a bit cheaper?
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    Where to find a square plastic fuel tank online?

    Hello folks. I am looking for a plastic fuel tank 12"Wx14"Lx16"H. Wondering if there are any places online that fellowhomebuilders use for plastic fuel tanks? I am helping my friend to restore a quad city challenger and his tank got a split. Any advise would be greatly appreciated Thanks
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    Which of the two warpdrive prop websites legit?

    Hello. I was going to purchase a warpdrive prop for my challenger and came across two websites that claim to be a manufacturers of warpdrive prop. One of them is Warp Drive Propellers and other is Warp Drive Carbon fiber Composite Propellers. The first one is located in Ventura,IA and other...
  20. C

    How to adjust the pitch on IVO prop ?

    Hello. I have a three blade IVO prop on Rotax 503. I would like to dial in a little more pitch. There is a shims on the hub on both sides of the prop so I am wondering what shims should I move where and what torque specs should I tighten the prop after I do? Below is the picture of my prop.
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