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Nigel Castle

XPerience Pro Ballast

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Nigel Castle

I recently bought an XPerience Pro in immaculate condition but it did not have a ballast set with it.

I set about trying to find a set to buy (it looks like Nan models no longer keep it) so decided I can make up a set myself.

An Internet search suggests that Copper Bar is heavier than Brass so I can order a length to cut into slugs.

The reason I am starting this post is would someone please measure the outside diameter of the standard set and tell me which size rod I need to buy, it is very difficult to accurately measure the ballast tube inside the fuz.

I think it is 16mm but not 100%

Would  a size 1mm less in diameter be prudent so as not to get it stuck in the tube?

Any help will be appreciated

Many Thanks

 

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pete beadle

Hi Nigel

Might be an idea to contact Austin, our moderator, he is Mister NAN Model and I'm sure he'll help you

Regards

Pete

BARCS1702

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Austin

You want 17mm OD brass bar. 

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Nigel Castle

Hi Austin,

Thanks for the information, stock bar comes as 16mm or 5/8in as I do not have a lathe to size the bar exactly only a Dremel to shape the ends, do you think that buying the 16mm bar would work OK? 

Can you tell me what length the slugs are when finished and how many the ballast tube will except?

Thanks in advance

 

Nigel

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pete beadle

Hi Nigel

When I used to find my ballast was slightly small, I used to wrap two pieces of electrical tape around each "slug" that usually worked, and cured the rattling at the same time

Don't forget you'll probably need a couple of wooden dowels of "slug length" and another couple "half slug length" ones to use to keep the CG where it should be.......

I used to measure the length/depth of my ballast tube with 3/8ths wooden dowels a half metre long

I've had two Expro's over the years and never found the need to use ballast with either though. odd.......:no:

Hope this helps

Regards

Pete

BARCS1702

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Mike

Nigel, Could any of this be of  use to you?

 Front row;   Ballast tube, takes 16mm slugs, snug fit.

Second row;  16mm ballast set for Maxa, on a rod, secured with allen screws.

Third row; 19mm Ballast set for Explorer?

4th, 5th & 6th rows;   16mm ballast sets for Xpro & Shadow, on nylon cord for easy removal.

 I've no idea of  value, so no sensible offer refused!

Mike

 

Ballast2.jpg

Ballast1.jpg

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Nigel Castle

Hi Mike, pm sent, thanks for posting. 

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Phil.Taylor

I made up a set of 16mm dia brass ballast for my recently acquired XPro.

One thing to watch out for - the centre of the ballast tube is well forward of the CofG (well it is on mine) - so either expect a significant forward CofG shift (full ballast) or have a scheme that leaves out one or two forward slugs to maintain the CofG

Phil

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Nigel Castle

Thanks for the info Chaps hopefully I can pick up a set from Mike in the next couple of weeks and that will sort out the issue nicely.

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pete beadle

Hi Nigel

As an ex ExPro owner myself I completely agree with what Phil Taylor describes......that's why you need (wooden) spacers and half-spacers.......so please don't forget them

It is a bit of an art form, adding ballast but not moving the CG forward when you do, but, if you play with the positioning of the spacers in the ballast tube you'll be able to keep the CG position the same when adding ballast. When you've found it, just number the slugs and spacers and load them in the same order.  BTW   I always found my choice was full ballast or none, half-ballast just didn't do the job....... 

Good luck

Pete

BARCS1702 

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