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Posted
On 5/31/2020 at 4:21 AM, Manix92 said:

Just out of interest why do they call them sprue's in the RC hobby world? Seen it a lot but it's not the correct name for what you are trimming.

Not a clue 

Posted
On 5/31/2020 at 4:21 AM, Manix92 said:

Just out of interest why do they call them sprue's in the RC hobby world? Seen it a lot but it's not the correct name for what you are trimming.

What would you call them?

Both the Oxford and Merriam Webster dictionaries refer to a sprue as a channel through which metal or plastic is poured into a mould, or a piece of metal or plastic which has solidified in said channel, especially one joining a number of small moulded plastic items.

I don't know about anyone else, but this sounds like what I trim when building a plastic model...

(Not the only name for them though - I have also heard them referred to as parts trees, and there may be other names too.)

Posted

Just did a google images search for sprue.

They look like sprues to me.

Now im not sure if I want to collect these warhammer figure things or not they look awesome.

  • Haha 1
Posted
On 5/30/2020 at 7:57 PM, MinTea said:

Car is working, everything is great - except:

It won't go backwards. What did we do wrong?

 

Check the throttle trim on your receiver.  Could be something as easy as that.  I believe in the right spot it will essentially not let you go in reverse.

Posted
9 hours ago, TurnipJF said:

What would you call them?

Both the Oxford and Merriam Webster dictionaries refer to a sprue as a channel through which metal or plastic is poured into a mould, or a piece of metal or plastic which has solidified in said channel, especially one joining a number of small moulded plastic items.

I don't know about anyone else, but this sounds like what I trim when building a plastic model...

(Not the only name for them though - I have also heard them referred to as parts trees, and there may be other names too.)

They are gates that feed the parts (tab gates, fan gates and sub gates being the main variants), the bigger channels that feeds the gates are the runners.

The sprue is what is left by the nozzle in the tool (the initial point where the polymer enters from the barrel) - electric heated nozzles either leave a small sprue up to the more expensive shut-off nozzles which leave no sprue at all (which are usually used for direct feeding a part which can have no mark).

Cold sprue bushes leave huge sprues, generally you feed into runners with them - they are cheap and cheerful. Them can directly feed a part but upon trimming leave a nasty mark which you cannot get flush.

With the Tamiya mouldings in the kits they are typical multi-impression with a runner system with gates feeding each impression. I have never seen a Tamiya moulding yet with the sprue left on. They may be using electric nozzles that leave tiny pips on the runner or the sprue has been trimmed off already. I will take a closer look next time I get a kit.

Posted

Reversing.

It could be that you’re not double tapping reverse, when going forward you can break by pressing reverse, you then release and press reverse again to actually reverse.

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