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  #1  
Old 01-09-2019, 10:16 PM
downtowndeco downtowndeco is offline
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Default Power source & jumpers on large AFX tracks.

I'm jealous of the large layouts that the UK guys do & will be freeing up some space for a new project soon. Nico, what sort of power source do you guys use & what do you use for jumpers on the large tracks? Thanks in advance.
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Old 01-09-2019, 11:39 PM
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18-20V regulated, 1.2-1.5A, and three passive jumper pairs.

What you gonna run though Randy?

Last edited by NicoRosberg.; 01-10-2019 at 11:26 AM.
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Old 01-10-2019, 02:38 PM
Bonez Bonez is offline
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I have a large AFX track that features four lanes at about 135-feet total length.


I run 3 and 6-ohm Viper chassis with 35-ohm Parma controllers. My power supply as an Astron 35-amp 5-32 volts. I have jumpers every ten track joints. I use mostly 15-inch straights and 18/15-inch radius curves.


No power issues at all.


I also laid 1/8-inch cork under the whole track id it is smooth and quiet (for factory AFX plastic track).
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Old 01-10-2019, 03:26 PM
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Whilst there is no downside in that many amps or jumpers, both are overkill.
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Old 01-10-2019, 04:21 PM
Bonez Bonez is offline
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One man’s overkill is another man’s margin. Horsepower, amps, money. I like margin...
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Old 01-10-2019, 05:05 PM
downtowndeco downtowndeco is offline
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Thanks guys. Plan on running basically stock Mega G & Mega G+ stuff. Clearing my area in the next few weeks and then looking at a track plan. Something organic and flowing.
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Old 01-10-2019, 05:13 PM
downtowndeco downtowndeco is offline
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Nice looking layout Bonez!
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Old 01-11-2019, 12:45 AM
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What footprint do you have for the track Randy?

The key to a UK track is that, rather than lap length.

The best ones tend to have a really long straight or two, tempered with technical areas so the best drivers and best cars win.
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Old 01-11-2019, 02:28 AM
Al's slotracing Al's slotracing is offline
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Quote:
Originally Posted by NicoRosberg. View Post
Whilst there is no downside in that many amps or jumpers, both are overkill.
Indeed in normal running conditions there is no downside to higher current power supplies. If a car only needs 2 amps in normal running conditions it only takes 2 amps even if the power supply can deliver 30+amps.

However, in the event of a fault such as a short circuit, the high amp power supply can put the full current (in this example 35 amps) into the short circuit which can cause damage. This risk can be overcome by putting a fuse or circuit breaker in the feed to each lane. This is common practice when high amp power supplies are used in the larger scales. For example if the cars don't need more than 3 amps a 3 amp fuse in each lane will do nicely.



(Another possible downside that just might be worth mentioning is the higher cost of a bigger power supply)
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Old 01-11-2019, 05:50 AM
Bonez Bonez is offline
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Agree. Each driver station is fused for that type of scenario.
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Old 01-11-2019, 03:13 PM
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A good rule of thumb is an active jumper every 10 feet of track length. There are many threads on soldering jumpers to the rails. A 10 Amp regulated power supply should be able to power a four lane track with 6 ohm motors without problems. And yes, fuses are a great idea.
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Old 01-11-2019, 03:18 PM
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We have found way less jumpers than that is fine, a 5A enough for four 3ohm cars capable of 300 IPS.
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