Margouillat SportsMann

[ford381stroker]

Your climb at 3:31 on the video was amazing! Nice work.

[TotoRax]

Hello,

Some news.

The upper carbon link installed.


After 2 run, the link seem to hold without problem. But I acknowledge not to have dared to simulate a large fall (+1m )…

The final weight RTR : 2.130kg - 4lb 10.8oz. But it would have dropped to 2,100 kg - 4lb 10oz with the new tire/whells/foam setup.


Some pics with panels.






I made some tests with foams. To have a better behavior in side hills, I use rings.





The place the ring between two foams, I use soft inner and outer foams. (yes, on pic it's firm outer )
I stick the ring on foams so that it does not slip.
The tests are interesting, the tires has a very good behavior.

[Stormin2u]

Thats a nice idea TotoRax your on the ball, did you play with your shock pistons from RPM yet, your going to like them.

[Szczerba]

Very cool assimilation of parts! The last climb in the video is pretty cool. I really like the chassis and the rear 4 link mount. Looks like a Salvador Dali creation.

[TotoRax]

Originally Posted by Szczerba

Very cool assimilation of parts! The last climb in the video is pretty cool. I really like the chassis and the rear 4 link mount. Looks like a Salvador Dali creation.

Thanks, I am glad to have built the first surrealist rig

Originally Posted by Stormin2u

Thats a nice idea TotoRax your on the ball, did you play with your shock pistons from RPM yet, your going to like them.

No, I don't play whith shock pistons from RPM, I only install the blue pistons.
Since I run like that and I of it am very satisfied

[BetaPan]

With your permission ... the Chinese Margouillat !!!

ZONACRAWLING • Ver Tema - De PANGOLIN a MATOUTOU

[TotoRax]

Originally Posted by BetaPan

With your permission ... the Chinese Margouillat !!!

Yes, you can !!

[TotoRax]

Hello,

I received my rims VP. I thus could assemble my first Losi!!


1" in rear with CI foam (medium inner ant soft outer)


.7" in front (medium inner and soft outer)


First test: Waou!! Losi have a super gripp A little better than Rover. But in sidehill, it is not good, especially with the front. The choice of the rims in .7” for the Losi does not seem to be relevant It is the moment re-to test my famous ring
I thus again remade ring of 38mm wide and 10cm of diameter, with soft inner and outer. The ring maintains the sides of the tire and gives again to him a flatter profile. After other test, it's better in side-hill and motricity remains excelling. Losi are really of very good tires, I start with good to like them. However, I was very faithful to my good old HB Rover

[AWDPete]

Good choice in rims - mine will be here any day :-) I might have to give those Losi tires a try, looks like red compound? I see you cut them, do they work better this way? I need to find a tire that works well on granite - mostly smooth and slipery!

[opek]

Originally Posted by TotoRax

The choice of the rims in .7” for the Losi does not seem to be relevant

Why did you go with .7 up front and 1" in the rear?

[TotoRax]

Hello,

Originally Posted by AWDPete

Good choice in rims - mine will be here any day :-) I might have to give those Losi tires a try, looks like red compound? I see you cut them, do they work better this way? I need to find a tire that works well on granite - mostly smooth and slipery!

Yes, I cut the tires, I based myself on what this fact generally. But it is in test. For the moment, I of it am very satisfied, but I did not roll much to draw the conclusions.

Originally Posted by opek

Why did you go with .7 up front and 1" in the rear?

Mainly by what I am curious I always used rims of 1”, and I wanted to test rims narrower. For the moment it is still in phase of test. Thus the configuration is likely to evolve much. Probably, I will test with rims .7” in the rear and 1” with the front.

[helhedded]

Originally Posted by Szczerba

Very cool assimilation of parts! The last climb in the video is pretty cool. I really like the chassis and the rear 4 link mount. Looks like a Salvador Dali creation.

x2! I love it.. It was inspiration for my build.

Do you know what the front axle weight is?

[TotoRax]

Originally Posted by helhedded

x2! I love it.. It was inspiration for my build.

Do you know what the front axle weight is?

Thanks

I weighed to crawl it, RTR the weight is divided: front 1.340kg and 0.790kg in rear. The bias weight is 63/37.Generally I have 60/40, but to compensate for absence of dig, I have a little more weight on the front.

[helhedded]

Originally Posted by TotoRax

Thanks

I weighed to crawl it, RTR the weight is divided: front 1.340kg and 0.790kg in rear. The bias weight is 63/37.Generally I have 60/40, but to compensate for absence of dig, I have a little more weight on the front.

Thank you. That was very helpful. I now know that if my front axle weighs more than 1.34kg (3lbs) and it can't pull off the same lines as yours then I must be doing something wrong.

[TotoRax]

Hello,

I decided this week to finish the frame started with this project, i.e. with Axial tranny, to compare.


Thus manufacturing of different the parts, with some modifications on the level of the support of the front shock.


First assembly







Weight of the complete frame with all screws and bolts >> 122g.
Knowing that the reinforcement of the roof replaces the skin, which makes it possible to still gain 10g


The frame is very rigid, not flex. To follow

[stolps]

I've been watching your builds for a while. Very impressive design and machining.
What is the advantage of the ax tranny versus the r2?

[TotoRax]

Originally Posted by FlexJohnson

that thing is nasty

Thanks

Originally Posted by stolps

I've been watching your builds for a while. Very impressive design and machining.
What is the advantage of the ax tranny versus the r2?

The frame with R2 modified is normally lighter and with a lower center of gravity. But it is theory , sight that there remains to me a transmission of Ax-10, I benefit from it to test and check.

[TotoRax]

Hello,

Some update.
Final assembly with the axle borrowed on my other crawl.




The support of the 4 link in delrin of 6mm.


The installation of electronics was as usual a nightmare The BEC finds its place under the servo.


The receiver (to which I removed his hull to gain of place, then coated with broad adhesive tape) is placed under the front reinforcement. In short, as usual, that returns to the shoe-horn.


Final weight >> 2.120kg RTR, that is to say 20g of less than the version with the R2V2 It is a good surprise
To come, the upper link of carbon, inferior front link in delrin and other trifles.

@+

[Stormin2u]

Looks good TotoRax your design and machining is excellent. Does the new truck weigh less? I'm assuming the Axial tranny weighs less than your modified R2, at least it's quieter.

I run homemade Hater tires, the tread is he same as the Boss Claws and the side walls are Rover I love them. But they absolutely hate narrow wheels their very similar to the Boss Claw but slightly narrower. Maybe your Lexan wheel raps will help. If not throw them on a wider wheel.

[TotoRax]

hello,

Thanks Stormin2u

For the difference in weight, I think of knowing the cause of it. The set-up is identical on the 2 rig. But on modified R2 ring, i use a 300 cvd with its steel locker , while on the ax-10 tranny, I use EGRESSor CVD with its aluminium locker.

The EGRESSor locker >> 9g


300 locker >> 30g


In fact modified R2 tranny weighs the same weight appreciably as the AX-10 tranny with plastic gear (except for 5g).
I recognize indeed that the ax-10 is MUCH quieter and soft, it is undeniable, but R2 modified has some advantages.

This R2 modified frame is designed according to 2 principal ideas :

• Considering the frame is inclined, if I place the motor in front of the transmission, it will be placed more low. The motor being elements heavy, that makes it possible to lower the general CoG of the crawler.
• Moreover if I place the motor in front of the transmission, it is located then in front of CoG, that decreases the weight on the back axle. Less weight on the back axle, it's less balast to be added on the front axle, therefore a lighter crawler. Moreover, without any ballast the front bias is naturally 60/40.

In against part, with the motor placed ahead, the integration of front link is more complicated

For the tires, I used my rings to put in my .7" wheels with Losi. The result is rather good, the behavior in side hill is satisfactory. The advantage of the rings it is that it avoids that inner foam does not crush outer foam, that makes a separation. Result the tire is crushed well at the place of outer foam and conforms well to the rock. In one the 2nd time, the ring rigidifies the tire, for him a good gives comprise in side-hill and limit crushing.