New FLM Low CoG Emaxx Chassis

[gumleguf]

Not sure I understand? Could you show a picture or two of the problem?

[SlavikR]

Everything is ready , that's only remaining tie to the antenna, but that's where? Tell me, or could have a photo!

[suicideneil]

The 3905 tranny bolts in place from underneath, but since the flm chassis is thinner than the stock plastic one, the bolts will stick up further through the chassis & tranny mounting points; I'm guessing they catch or rub against the back of the spur gear / slipper mechanism?..

[sikeston34m]

Originally Posted by suicideneil

The 3905 tranny bolts in place from underneath, but since the flm chassis is thinner than the stock plastic one, the bolts will stick up further through the chassis & tranny mounting points; I'm guessing they catch or rub against the back of the spur gear / slipper mechanism?..

Yes, you are correct.

Before I realized what was going on, the screw came through and crushed the backer plate to the slipper.

The top plate being so thin is a concern of mine.

It's only about 1/8" thick to begin with. There's ALOT of material removed so the spur gear will clear. It's VERY thin there.

Where the top plate bolts up front and rear, on the top, additional material has been removed. This makes this stress point less than 1/8" thick.

If the top plate were made from 1/4", it would have negated several issues.

I'm building it and will put some serious torque though it. The Mamba XL and 8S Lipo will make sure of that.

We'll see how it turns out.

[sikeston34m]

There's very little clearance there between the tranny and the slipper.

This slipper is shot.

[gumleguf]

Okay, I see. Well, I noticed that too and just used a shorter screw for that particular hole.

[suicideneil]

Definitely seems like an oversight on FLMs part, they really should include a paper manual or a note to warn people about any little mods that need doing when installing parts.

[coolhandcountry]

Could just include 4 screws with the kit to mount the transmission.

[Popoxx]

Normally there are 4 spacers included in the kit to fix that. But maybe they removed them ?

[sikeston34m]

Originally Posted by Popoxx

Normally there are 4 spacers included in the kit to fix that. But maybe they removed them ?

There are some small spacers included with the kit, but they are made for countersunk 3mm screws.

They won't fit the non-counter sunk larger transmission screws.

[Popoxx]

^^right... Useless post sorry

[sikeston34m]

Can someone measure their front dogbone that came with this kit and let me know how long it is?

pin center to pin center.

I have lost mine!

Running 8S, it snapped the yoke off the front differential.

The drive cup and the front dogbone went flying.

I found the drive cup, but not the dog bone.

I need a replacement.

[gumleguf]

Contact FLM. I'm sure they will sell you a few spare ones.

[gumleguf]

Here is my review of the FLM10700 LCG chassis. I have submitted feed back and constructive criticism to FLM using both the contact form on their web site and their direct email address but I haven't heard back from them.

I have emptied maybe 10 packs and drove the chassis primarily on grass and on two or three occasions on gravel. I did not bash the chassis but did do some small jumps on a track.

Spec's on my truck:

- 4s Lipo
- Hobbywing 150 ESC/2000 kv motor
- Hitec 5996TG servo
- Traxxas #2218 rx
- Weight ~11.5 lbs
- Runs about 55 km/h (35 mph)

Videos of the truck running:

http://www.youtube.com/watch?v=qMMNwkZjmgc

http://www.youtube.com/watch?v=McQeofeKA8Q (in this video I tested a carbon fiber bottom plate I made myself)

I find that:

1. The chassis is well made and designed. Everything fits together nicely. It drives great!

2. It's perhaps a question of taste but I think the bottom plate is a bit too "simple". I'd love if FLM offered an optional carbon fiber bottom plate or if they'd bent the aluminum bottom plate to strengthen it much like was seen with the GorillaMaxx chassis. I would like to mention though, that I had no issues with using the FLM aluminum bottom plate.

3. The top plate is too thin. This causes the top plate to flex from the power of the servo.

4. The cut out in the chassis around the spur gear is critical! As you can see in the picture below the chassis snapped/broke during my last run and I did not make any huge jumps or bash it hard in any way.

[gumleguf]

UPDATE: I received a mail from FLM today and this is the first break they have seen like mine so I could have had some bad luck with my chassis. They mentioned they would revise the design and send me a new top plate if I paid for shipping. Pretty cool, FLM! Thanks. :)