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HelicopterSynergy R/COther › Did I just ruin my fan shroud? URGENT!
11-22-2006 04:18 PM  11 years agoPost 1
u52ah

rrApprentice

Kuwait

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as I was reading through the manual and the pdf guide available on synergy's website, they described the need to trim the shroud in order to fit the shroud.

well, they say do it to avoid rubbing on the cooling fins,, I hope they meant the cooling fins of the engine's head, I did it. what I am not sure about is that whether they also meant the fins on the crankcase itself too just below the cooling cylinder? coz as soon as I trimmed that section, the shroud could freely move!

My main concern is this: will the engine and shroud be aligned correctly once mounted on the frames? my concern is whether I could align the shroud so that it doesn't touch the cooling fan.

Please advise!

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11-22-2006 05:40 PM  11 years agoPost 2
raptorheli2

rrElite Veteran

rip off britain and no changing it

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when they say trim they mean where the head of the engine is.

you will likely find that the fan might rub very slightly in the shroud when you have it snugged up. if it is minimal i would leave it as it will bed in within a few revs.

we have noticed the top of the shroud is not level so you need to push down on it slightly to take any cupping out. that may aslo stop the fan rubbing. as i say if it's minimal just roll with it rubbing.

cheers


www.waterfoothelis.com

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11-22-2006 06:10 PM  11 years agoPost 3
Chuckie

rrKey Veteran

Crofton Maryland

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Synergy Engine Alignment Procedure

1) Install the engine, engine mount sides, engine mount center block, engine shims, fan shroud, and pinion bearing block with all screws and bolts. Do not tighten screws and do not install the hex adapter. Lightly tighten only the screws mentioned at each step.

2) Lock pinion block. With the engine in position so the pinion and main gear are tight, press down and tighten the screws in the pinion bearing block.

3) Set the height of the engine. You want the engine as high as possible but you also want 0.25 to 0.5mm up and down play in the clutch bell. Snug up 4 engine bolts to engine mount sides and 8 engine mount sides to engine mount center block.

4) Fan Shroud. Tighten the fan shroud screws and check for the fan rubbing by rotating the clutch shaft. Move the shroud forward and back and if necessary set height by moving as much as the screw holes will allow. You might have to reset the engine height to prevent fan from rubbing. Install engine exhaust header/muffler and check shroud clearance. Have some gap between the shroud and muffler.

5) Pinion to main gear play/back lash. Loosen the screws holding the engine mounts to the side frame, without changing the height adjustment set in step 3, and set main gear back lash. While holding the clutch bell move the main gear and set so there is a very little back lash throughout the entire gear. Rotate the gear every 30 degrees and check for some back lash. If the gear is out of round set a tight condition at the high point and allow the gear to wear in the first few flights.

6) Clutch shaft in frame alignment. Remove the pinion bearing block and check distance on both sides from inside side frame to clutch shaft. The measurement should be about 0.4inch or 10mm or the same on each side. Loosen 4 screws for ONE engine mount at side frame and move engine to set same distance. Tighten 4 engine mount and recheck gap.

7) File down a little bit of the surface of the clutch shaft on the right side of the funnel shape hole. This will make removing the hex adapter easier at a later date.

8) Install pinion bearing block and Hex adapter. Hex adapter M4x6mm set screw (100-466) should have a taper on the end so it fits into the funnel shape hole. If height of engine has changed set position of pinion bearing block so the clutch bell has some up and down play. See step 3.

9) Add locktite to the appropriate screws shown in the manual and fully tighten all screws.
Regards.

Charles

Please stand by for faster service!

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11-22-2006 06:35 PM  11 years agoPost 4
u52ah

rrApprentice

Kuwait

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well thats valuable information! thanks guys, it's good to know that I didn't really ruin the shroud!

chuckie, If I need to follow the steps you mentioned, I may have to skip through some steps from the manual to get those parts needed for proper alignment right? well this is my very first synergy build so I wanted to follow on building step by step..

I believe the picture gets alot clearer when things are put together, if I notice anything after the build is complete, it'd be easier to correct..

Thanks guys..

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11-22-2006 07:47 PM  11 years agoPost 5
Chuckie

rrKey Veteran

Crofton Maryland

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My steps can be followed when you get to page A8. You should reset the motor alignment if you have any of the following after page A8: The fan rubs the shroud, the main gear is tight on the pinion, you don't have any up and down play in the clutch bell, or your clutch shaft is not centered in the frames (you need to remove the pinion block to check).

Charles

Please stand by for faster service!

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HelicopterSynergy R/COther › Did I just ruin my fan shroud? URGENT!
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