Build Questions

[v58fuy]

Hi guys,

Can you help me with a couple of build questions.

1) I have a small amount of end float on the main bellcrank shaft - should this be shimmed in some way?

2) Again relating the bellcrank, the outer elevator bellcrank is rubbing on the frame i.e. the screw end of the balls is just touching the frame - should I simpIy file down the excess thread protruding? (if I shim the play out in 1) above, I think the threads would clear the frame.

David

[ROSSCO]

Hi David,

With regards to the end float in the shaft, you dont have to shim it in any way but what you have to do is take out the float with the central elevator arm. Best way to do this is install all bellcranks tightening up the outer bellcranks but leave the central arm and elevator bellcrank loose then using your fingers push the arm over to the L/H side of the frame (Exhaust Side) and install the set screw to secure making sure you have it on the machined flat on the shaft. This should take out all your float, then tighten the set screw into the outer elevator bellcrank also making sure you have the grub screw on the flat of the shaft. On the opposing side where there is a single bellcrank there should be a spacer so that both sides are equal. I believe there is a shim in the spares bag in the kit but can't 100% remember but mine didnt need any shimming.

Also with regards to the ends of the threaded section on the balls going into the outer bellcranks, i know what you mean by these. i noticed this also but these don't rub the frame at all but they are pretty close. You could simple install and then slightly file down or take a dremel and grind them down slightly.

Hope this helps, and if you have any further question please just give me a shout.
Your going to enjoy the N5, i'm really liking mine at the moment it is an awesome machine!!

[v58fuy]

Rossco,

Thanks very much will do as you say.

Couple of other questions:

1) I have checked the main shaft lock collar, and its threaded in both parts - should I do the drilling tip on the bolt head side?

2) I have measured the one-way sleeve and it's just a hair under 12mm, I guess 11.95/11.98mm something like that, does this mean I can simple install the main gear without any further work?

David

[ROSSCO]

Hi David,

Yeah, if you've found that you have one of the collars which has the machining error where both sides are threaded, just simply follow the tips on Matt Boto's website and drill out the bolt head side of the coller.

Main Shaft Pinch Collar -**CRITICAL**

Some of the Main Shaft Pinch Collars are tapped on both sides. This will cause the pinch collar to not grip the main shaft tight enough. Please check your pinch collars to make sure that the front side is a 2.5mm through hole and the back side is tapped. If not it is very easy to run a 2.5mm drill through the front side of the pinch collar.

With regards to your Auto-Hub assembly, it looks like you have a good sleeve so i would be tempted to just install it as it is and see how it goes, it should be fine. Mine was just a whisker over 12mm and initially it was fine but after 4 flights it started locking up, i ground and polished the sleeve so it was under 12mm by spinning it with a Dremel and polishing the outer surface with emery tape and fine wet and dry paper using oil to approx 11.98mm and then cleaned out the one way bearing with solvent and a can of air duster to remove the grease and then re-lubed with Tri-Flow oil and so far it has been working a treat, no lock-ups since!!

[ROSSCO]

I would probably recommend that you replace the star-lock washer on the tail pitch slider assembly to one which looks like this as it is a better quality star-lock washer. With this type of star-lock washer you don't have to use epoxy or CA to hold the washer in place, as the wash does what it is designed to do and dig into the sleeve so you will be able to get it on but you will need a jack hammer to remove it!

They can be bought from most hardward suppliers or from an online retailer, you want to getting the 8mm washers.
http://www.fixingsupplies.co.uk/washers/starlock.html

[v58fuy]

Thanks, had already bought some of the star-lock washers before my kit turned up.

David

[v58fuy]

Guys,

1) When installing the main gear and tail pulley are both retaining bolts treated as 'jesus' bolts i.e. just nipped up rather than fully tightened?

2) Is it normal to have vertical play in the main gear of between 0.5 and 1.0mm? Are you shimming this play out?

3) When running the OS 55 are most people using the engine mount shims or leaving them out?

David

[ROSSCO]

Hi David,

The bolt that is used on the main gear that goes through the auto hub and sleeve is just snugged up but the bolt that goes through the tail belt drive pulley is done up tight.

There will be some vertical play in the main gear assembly, this is normal and no shimming is required.

I am using the OS55HZ in my N5 and i am running the motor mount shims.

[v58fuy]

Top man sorry for being a pain, but the experience of others who have already built is invaluable.

Thanks,

David

[ROSSCO]

No Worries David, glad to help!

[v58fuy]

Have you guys loctited the pinion gear where it goes into the pinion bearing?

Remember used to have a problem on the Vibe, that if the start shaft dropped a little by the grub screw in the starter cup slipping, then the clutch bell and pinion would drop slightly causing rubbing of the bell on the clutch shoe.

David

[ROSSCO]

Hi David,

I used Red loctite on the threaded portion of the pinion where it goes into the clutch bell and then a small amount on the plain shank of the pinion where the bearings seat, then slide the bearings on and assemble the clutch stack. this allows the bearings to work as they should rather than have the pinion run inside the bearings.

I don't think it is needed, as once you have the clutch stack assembled it is not going anywhere as the start shaft holds it all together.

[Rctintin]

David, have a little read of this thread as well mate, some good tips here as well.

http://www.rcheliaddict.co.uk/synerg...ps-thread.html

[v58fuy]

In the manual which was written for the plastic main grips, it talks of different washer combinations for damping.

My kit came with the metal grips already assembled, but has only one thin washer per side - is the normal damping setting? Do I need to add any washers (there are some in the spares bag)?

David

[ROSSCO]

Hi David,

I went for the 'Normal' setup for the shims, which i belive is one shim per side.

The Dampers are quite rigid so they don't need compressing like O Rings but simply shimmed to take out any end float in the whole assembly.

So far i am happy with the performance of the dampers with the Normal shim setup, initially during the break in of the model i could tell the dampers were quite rigid dut to the head giving a slight bobble during hard stops but after a few flights they are bedding in nicely.