BOILING POINT REACHED

[johnbull]

Hi friends. Greetings from Malta.

I would be totally with moderators who lock threads that are abusive, insulting, harmful to our sport.

But locking the Boiling SD parts thread was indeed a pity. I thoroughly enjoyed the humour, even though I am many thousand miles away. It was cheerful, polite, and totally harmless, and refreshing to see like minded people enjoy a bit of a banter.

Please. Please. Reconsider. Unless of course I have missed something!

Regards

Joe from sunny Malta.

[burgie]

I think it was the tasteless remark in there about his car having cancer that was the final straw - I agree with Marcus about locking the thread at that point before somebody was unduly upset by comments such as that.

[Chris Kerswell]

I must appologise for that comment, it was unacceptable. My only defence (and its not really any good) is the time I posted it (about 2am) and I was not thinking straight.

Sorry if I have offended anyone, cancer is not somthing to be joked about.

Regards
Chris Kerswell

[johnbull]

Hi friends. Greetings from Malta.

CHRIS BURGESS>

OK. I fully understand. Very fair comment.

Knowing Chris Kershaw I am absolutely sure that he did not mean to upset anyone.

Right, now can we get back to discussing boiling plastic bits.

I keep a few sets of wishbones, hubs etc for both my SD and my son's TC3 in a box I take with me to the track. I put them all in the electric kettle at home, boiled the water and left them there to cool down.

Imagine the comments from her indoors when she switched the kettle on again to make a cuppa..... and poured TC3 hubs into her cup.

Try explaining that one. I wasn't the most popular guy around.

regards

Joe from sunny Malta.

[cobra81li200]

Were the hubs any good ? Lol

Maybe we should do that when she's not at home (well that don't applies to me)....

Did she throw the parts away or did you manage to get them back (maybe after an hour or so of negotiations) ?

Let us know how the parts worked after you intentionally hit a brick wall at full speed (I'm sure you can do that for us ;D ;D ;D ;D ;D ;D ;D)

[burgie]

does boiling the parts work on all wishbones, or just plastic ones? and does it depend upon the manufacturer? I presume the wishbones are boiled to take away some of the brittleness, and to allow them to "give" a little more rather than snap?

[Chris Kerswell]

1) Jon Ball - check my profile for my name :P

2) Boild the parts will have very negligable affct because there is a lot of filler in the wishbones which will not move when boiling. Boiling graphie ones will have even less affect.

[burgie]

thats what I thought, so whats the purpose of boiling the parts?

[Alec Jones]

The purpose of boiling the parts is to relieve strees and tension lines caused by them cooling to quickly. When the parts are released fromt he mold they coll down in the open air (quickly) and this can causes then to seem brittle as they are streesed from the quick cooling.

Cooling is water is allot slower and lets them cool down slowly removing some of the tensions made from the molding. I did it to mine and havent broken anything since. Im not saying its a cure, but i cant hurt to try it.

Also putting salt in the water will raise the temperature at which the water boils therefore meaning it will remove more stress lines. It doesnt really make the parts any softer, although soaking in cold water for long periods of time is supposed to do this. Hope this helps.

[burgie]

how long do you boil them for, is it just until the water starts to boil? I presume that the parts do not warp when they cool down! That would cause some interesting handling characterisitics. :-

[Alec Jones]

With mine, i boiled the water added salt, Droped all the parts in the water, left them on the heat whilst stiring for about 2mins. Then turned the heat off and put a lid on the pot so that they would cool even slower. Once cooled fully took parts out dried them and fitted them to the car again.

[cobra81li200]

An usual time for a steel is about 20 minutes at the specified temperature. I think the plastic parts don't need so much time, 5 minutes or so should be allright...

[johnbull]

CHRIS KERSWELL.

Sorry about the spelling. But you know what I meant.

Took the SD down to the track this afternoon. It was brilliant. Don't ask me why.

regards

Joe from sunny Malta.

[Chris Kerswell]

;D thanx :P

Surly you know why?! - its a good car!

[burgie]

With mine, i boiled the water added salt, Droped all the parts in the water, left them on the heat whilst stiring for about 2mins. Then turned the heat off and put a lid on the pot so that they would cool even slower.

Lol!did you garnish them, before you served them? ;D

[johnbull]

With mine, i boiled the water added salt, Droped all the parts in the water, left them on the heat whilst stiring for about 2mins. Then turned the heat off and put a lid on the pot so that they would cool even slower.

Lol!did you garnish them, before you served them? ;D


Great with a spot of mustard. Preferably French.

[cobra81li200]

What do you have against french ? >:( >:( >:( >:( >:( >:(


;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D

[johnbull]

Nothing at all.

I just prefer French mustard to English mustard.

[cobra81li200]

Lol, I prefer any french food to english food, and I now live in england :'(.

;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D

No offense I was joking... Still french food is the best... with italian...

[Mark Stiles]

The reason the parts are so brittle could be due to them being left in the air too long. All the moisture in the plastic dries out, leaving it brittle.

People have had this problem with chassis (made from nylon) for 1/12th stockcars. They left the chassis in a pool of water, to stop them drying out, and the problem was solved.

Perhaps putting your wishbones/hubs in a bag of water in between meetings could be an idea?!

[AzNDRAGster]

That may be a good idea. . . . Put them in a container full of water. . . . Somebody try that and tell me what happens. ;D

[Chris Kerswell]

They will get wet..... you take them out and they will dry..... amazing, thats about all that will happen though

[AzNDRAGster]

Well its better than leaving them in the sun all day.

[johnbull]

CHRIS KERSWELL.

A bit out of subject.

You asked for pics of my Yoke. I put some in rctech a few days ago. Check them out.

Don't know how to put pics in this one, and I don't think the bosses will be too happy if I take up space with pics.

Regards

Joe from sunny Malta.

[BC Rog]

Guys, please drop this moisture thing!

I am an automotive design /devlopment engineer an can assure you that the effects of water ingress into the plastics we use are minimal if they exist at all.

The advantage of boiling is that it relieves streess in the parts.

Any gentle heat and cool cycle will do the job. Boiling water works well as it prevents any major warming by distributing the heating / cooling effect evenly around the parts. For this reason you need to keep the parts away from the base / sides of the container.

I have tried this with some SD parts and found it doesn't seem to warp the parts (measured properly before and afterwards).

As stated by somebody else previously a bit of salt helps raise the boiling point of the water. I recomend something like 1 teaspoon per 1/4 litre.

Hope that helps clear things up a bit.

Rog

[cobra81li200]

Aaaah thank you !

I must say I totally agree with RC Bog.

[cobra81li200]

And what will happen if we put the car in the microwave hoven ? Can someone try this and tell us ?

;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D

PS : do not do it, it's a jooooooke

[Chris Kerswell]

As I said :


They will get wet..... you take them out and they will dry..... amazing, thats about all that will happen though


Thanx, I will try to find the pics :)

[Dave G]

used to use wd40 on motorcross plastics..seemed to help keep them supple and less prone to breaking.as rog said any moisture is pretty usless unless the material is porous.

dave

[whoopass]

why dont yokomo make the wishbones out of a more supple plastic and offer to replace all the wishbones previously manufactured?
Didnt Associated swap wishbones out on the first TC3's????

[DA_cookie_monstA]

Probably because the markets they are designed for, they are fine, high temp/humidity. Us poor sufferers in the UK either have to put up with it or drop Yokomo, which is what nearly happened with Losi manny moons ago.

[BC Rog]

As DCM said,

it's a northern Europe thing ... especially blighty!!!!

All cars suffer more with our winters than those of California!!!!!


Boiling up the parts to make sure the stress risers are out doesn't take long, cosy much orcause any other problems. Surely you all carry a spare set of arms everywhere with you?!?!?!?!

As for using a differnet material I suggest that if they did then people would complain about them being flexible and not keeping consistent geometry!!!

Just look at a Hyper 7 1/8th car .... would you want wishbones you can tie into a bow???? No!!! One of the reasons I droped it!!

Rigidity and brittle go hand in hand I'm afraid .... blame Newton!

Rog