Engine - Unique Glue Free Eco Friendly Wooden Mechanical Self Assembly Moving Kit
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|Item Dimensions LxWxH||3.07 x 3.94 x 6.38 inches|
|Number of Pieces||81|
About this item
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- Pneumatic engine
- Self-assembly model
- The material is plywood
- Unique and innovative games
- No glue
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It was once a time of great steam engines and people were amazed by its unseen power and noisy operation. Air motor from UGEARS is a small but exact analogue of steam engines. You need just to blow into a special socket or an ordinary balloon and air motor will start working. This model is unusual because is made entirely of wood materials. This mechanism has an air tachometer and two boxes for details.
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They did send a new one because the first one broke by the laser cut. Their customer service was good.
Overall a really fun little kit. I can't wait to start the Ugears tanker truck I bought!
There are a couple critical parts of this model that need special attention, the number one issue is the spacing and tuning of the upper piston, it is the smaller one with 2 pistons and it is actually the air diverter valve the controls the air flow AND timing to the larger power piston ( lower). When you fit the piston and housing on to the lower base the slot in the bottom of the piston assembly fits over the middle rail in the base...the rail is longer than the piston assembly and this allows you to Correctly "Time" your Engine! It is crittical that the upper piston is centered in the jug as you rotate your flywheel...the pistons should travel to just sub-flush with the jug at top dead center on the left and bottom dead center on the right!...you need to remove the last plywood round ring on the left to view this correctly! Roll the engine over slowly, then if the upper piston sticks out at the end of it's travel either on the left or on the right...gently lift the entire assembly and slide it left or right until both pistons come just flush or better yet just sub flush...if the piston travels to far to the left it will tap the last ring of plywood, cause your engine not to run...if to far to the right it will leak to much air and the engine will have poor performance.
The second adjustment is my piston rod (the big one that goes from flywheel to lower power piston) would touch the axle the Tachometer needle rides on if I fully seat the piston/cylinder assembly all the way down on the middle ridge...carfully observe it as you roll the engine over slowly and if it touches then slightly raise the assembly until it no longer touches!
Than recheck timing in upper cylinder...if still well centered the engine should run well with just your breath, try not to get moisture in your engine!
The other area I differ from manufacturer recommended assembly is rather than lubrication from wax I use graphite, just an ordinary #2 pencil, I rub both the bore and the pistons all very well with the pencil lead until they are completely silver gray, this has a burnish effect making the grain of the wood very smooth and slippery from the graphite, this is much smoother than sticky wax...I also use it on the toothpick axles and also the holes the toothpicks ride in...my engine will coast for nearly 4 seconds with only one finger flick!
I do sand the little nubs off the parts but no more than the nubs! The Pistons are undersize for free running and therefore leak Some air...if you sand to much you engine will leak excessive air and have poorer performance.
A final optional tip...as you build the jug out of the layers of plywood...lightly sand the flat sides with a fine sanding block, this removes the little wood fuzz and causes the engine to seal better...I went one step further and rubbed a smooth even light coat of wax on the flat sides of the layers as I assembled...the soft yellow bee's wax acts as a seal or gasket between the layers for nice air tight fit.
Lastly the flywheel takes some fiddling to get it to run true and smooth, select your best toothpicks for axles!!....spin them in your fingers to be sure there straight!!...time spent here will reward you with a beautiful running engine...I wrote this review because I enjoyed this kit very much and hope it inspires others to get there Engines running well.
PS: the flywheel and pistons are blurry in my photo because my engine is coasting!