Tamiya TRF503 announced with picture

[Fredrik Emilsson]

The force from the impact was transferred to the top deck and when it snapped, the chassi had no support and it resulted in a bent chassis.

I´ve done some work tonight and redesigned the top deck. Made it a bit wider and it wil also be thicker of course.

[SiR_Dave]

Originally Posted by Fredrik Emilsson

The force from the impact was transferred to the top deck and when it snapped, the chassi had no support and it resulted in a bent chassis.

I´ve done some work tonight and redesigned the top deck. Made it a bit wider and it wil also be thicker of course.

Fredrik.. Please do a thicker front upper deck as well.. same design as the Tamiya... and can't wait to see the what you come up with for the rear design... looks like you could go about 10mm wider and about .05~1mm thicker front and rear for the upper decks

[Origineelreclamebord]

CF's strength is high, but that only counts for the tensile direction of the fibres. In the pictures it seems the CF was not pulled on, but compressed instead (as the chassis is bent up). In the end the plate just flexed downward until it snapped.

A CF chassis should not be necessary: It may have been a bad batch of CF, but to be safe I'd make a mod. A wider top deck may help, but affects torsional rigidity of the chassis. Instead, I would try a thicker top deck, which should have a lesser effect on torsional rigidity as the plate is so narrow - and if the impacts cause the top deck to flex downward like this, a thicker top deck has more effect on strength than a wider one.

So as a first solution (if there is enough clearance) I think you could test running double top plates, much like some guys run double shock towers

[Chris]

Originally Posted by SiR_Dave

A carbon chassis would be awesome... If someone was willing to make them... I know I would buy it....

https://www.facebook.com/#!/SepesRac..._type=bookmark

[D-StyleNZL]

Jimmy Wright is broken a few rear upper decks from just his normal racing.

[SiR_Dave]

Originally Posted by Chris

https://www.facebook.com/#!/SepesRac..._type=bookmark

[muratti]

Hey guys, i have a NIB 503 in the for sale section, just in case somebody needs spares quickly!

[kentech]

I have not followed this much lately so I don't know if this has been mentioned, but Tamiya are releasing TRF Double Joint driveshafts for the 503 in August.

42283 Buggy Double Cardan Joint Shaft (Front/2pcs.)
42284 Buggy Double Cardan Joint Shaft (Rear/2pcs.)

http://kentech.blogs.se/

[marco NL]

Sepes Racing Products


Coming soon: TRF503 2.5 mm carbon upper decks (F+R)

https://www.facebook.com/SepesRacing..._type=bookmark

[SiR_Dave]

Originally Posted by marco NL

Sepes Racing Products


Coming soon: TRF503 2.5 mm carbon upper decks (F+R)

https://www.facebook.com/SepesRacing..._type=bookmark

Very nice!!..

I just wish that guy would return e-mails

[SiR_Dave]

Originally Posted by kentech

I have not followed this much lately so I don't know if this has been mentioned, but Tamiya are releasing TRF Double Joint driveshafts for the 503 in August.

42283 Buggy Double Cardan Joint Shaft (Front/2pcs.)
42284 Buggy Double Cardan Joint Shaft (Rear/2pcs.)

http://kentech.blogs.se/

Wonder how much this well set back my pocket book

[kentech]

Originally Posted by SiR_Dave

Wonder how much this well set back my pocket book

List price in Japan will be 5000yen for the fronts and 4800 for the rears.

[Robbhp]

Can someone explain the advantage of a double jointed UJ

[D-StyleNZL]

Funny enough I was thinking if you could use the TRF418 double joints on the 503 shafts lol.

but I remember from my TA05VDF:

Smoother transfer of drive to axles.
Wider angle of operation.
Less noise.

But for Offroad, more parts to keep maintained/clean. (Thou I have boots on all my CV joints)

[Aussie Top Force]

I fail to see the point of the double joint? Second joint closest to the wheel would be locked straight between the bearings in the hub carriers, so why have the second joint at all?

To me, this would create more opportunity for flex and place more stress on the outside bearing?

Further will new hubs be required?

I like the idea of the CV joint being located closer to the inside bearing of the hub, but, I still fail to see the need for the second joint.

Would anyone like to explain or post a cut away of how it functions in the hub?

[patez]

the real benefit might be cheaper and more available axles.. Ta06 ball diffs work really well with the 503. Better quality than the older 501/db01. Its good that we have parts from touring cars. (altought many of them need some reinforcing, like the gear diff needed)

Does ayone know if there are same dimension ta06 steel ball diff outdrives? The alloy is really nice but seem to wear fast in the rear, even with blades.

[Toon]

Stellamodels in Hong Kong have now got a few 503 parts listed (upper decks, damper stays, chassis, front bulkhead/suspension alloy parts).

http://www.stellamodels.com.hk/advan...1&x=-661&y=-65

Still no drive belts though!

[caneye]

I received an email from a Japanese hobby shop that there is no stock of the belts at the moment. However, there will be a production run coming up in Aug. Hopefully we'll have better luck after that?

I believe this is how the TRF stock is produced - in batches?

[D-StyleNZL]

I check a local hardware suppler for some belts. they had correct lenght and width, it was the tooth profile which needed checking. But im not home for another 3 weeks so will have to wait.

[marco NL]

TRF503 belts in stok

http://www.modellbau-seidel.de/index...a&best=6244030