Bark Box

[ianmac]

Was reading about the traps and some people sware by these bark boxes.

Does anyone have any plans etc or could perhaps describe how you build one.

Cheers
Ian

[abby]

Ian try this link ! It's not much but may take you a bit further.
www.mylargescale.com/Community/Forums/tabid/56/forumid/11/postid/41992/view/topic/Default.aspx

[ianmac]

I did end up finding a guy who makes them however they are always for a particular engine.

I really wanted to make the thing my self as i doubt they are anything special.

Anyone have some ideas?

[spurley]

Hi Ian

What is a 'bark box' please? Is it something to do with trees or dogs?

Cheers

Brian

[modeng2000]

Here is a discussion about bark boxes together with some photos.

www.mylargescale.com/Community/Forums/tabid/56/forumid/11/tpage/2/view/topic/postid/11754/Default.aspx#14482

John

[ianmac]

Bark Box is a device that fits onto the exaust blast pipe. It makes for a louder more prototypical sound.


You know, like how the kiddies out those god awful muffler kits onto a 1.2L to try and make it sound like a V8

;D

I wasnt keen on a tist, tist, tist tist sound when you could get it to sound more realistic.

Ian

[spurley]

Thanks Ian I see what you mean now.

Whilst on a visit to the Dublin Model Engineer's a year or so back, they were running a model of one of the Iarnrod Eireann GM Diesels on their ground level track. It was a two stroke petrol engine driving through an hydraulic system, but sounded quite realistic with a nice 'whistle' on the exhaust. That's exactly what had been done! The builder had tapped into the exhaust manifold and fitted a Police whistle so it picked up on the 'off beat', if you like, and sounded most convincing.

Cheers

Brian

[ianmac]

What a creative chap!

Not until after you hear a diesel go by do you think about the whistle.

I guess i will have to fiddle about a bit to get it to sound the way i want but hay i just want it to run really

Ian

[spamcanman]

I think is all you need is a good load for the loco my Asters are very quite with a couple of coaches but stick 8-12 coaches behind them and with the 'Battle of Britain' I can clearly hear the 3 beats and the chuffing is louder

[havoc]

A good load is one thing, but it bear to remember that in real life exhaust beat wasn't a good sign. The louder the beat meant more power wasted up the stack and not used on the wheels.

[ianmac]

HMMM needs to build me some coaches!

Those aster locos just look fantastic.....here i was thinking that i could have built a loco cheaper.........once you have purchased materials, tooling and bits and pieces it comes close.

Least i have to tooling for the next loco.


Thanks havoc, i wasn't aware that the sound was a giveaway, makes perfectly good sense though.

[paul]

Ian, I have a PDF that describes a very simple 'exhaust amplifier'. It's designed for small stationary engines but could doubtless be up-sized. PM me if you'd like a copy.

[ianmac]

PM Sent

Cheers
Ian