Monster beetle / frog gearbox fix - a new strengthener

[KEV THE REV 2312]

2 minutes ago, Problemchild said:

This is the full fat 540 one

Darn . I've bought skimmed and I could have bought full fat for £2 more - I might pull the trigger

[Problemchild 2149]

13 minutes ago, KEV THE REV said:

Ah , hence the cheapeness . Oh well I'll try it out and go from there - I don't expect the thunder of your B/L

Trust me - that goolRC will be better 

try the skimmed one first 

JJ

[KEV THE REV 2312]

Can I use a 3650 with the 45a ESC ?

[Problemchild 2149]

Just get another combo - then you have two sets 

JJ

[KEV THE REV 2312]

Sweet . Don't need much persuading :) . Will the 380 perform anywhere like a Sport tuned ?

[KEV THE REV 2312]

Trigger pulled :)

[Problemchild 2149]

Worlds apart haha 

did you see my speed runs at the end of the vid I posted last night - that’s how your beetle will run

JJ

[Problemchild 2149]

It’s holding up well in the mud and dirt too

please like and subscribe if you enjoy 

JJ

[TheMidnight Pumpkin 260]

I have a question. Do you think diff putty would stop the clicking, since it would change how the diff works as opposed to the printed gear box braces?

[Frog Jumper 3658]

7 hours ago, TheMidnight Pumpkin said:

I have a question. Do you think diff putty would stop the clicking, since it would change how the diff works as opposed to the printed gear box braces?

I would think putty would make it worse.

As we all know, the problem is that the side plates flex under load allowing the diff gears to loosen up to the point where the teeth skip. I think adding something too tacky would cause the gears to spread more worsening the issue.  But to be honest, I’m not sure.  I have no experience with putty.

In my current BF build project, I used a thick silicon goo, but very little of it.  But I’m using the MHeald plates to help with the flexing issue.

Terry

 

[Problemchild 2149]

We are going to test 2 more versions 

an additional 0.2mm and a 0.4mm pressure  this will allow is to work out the best level of pressure 

I think we have it but it’s always best to test a few more versions to make sure we get the best out of the brace

 

JJ

[Problemchild 2149]

So I’ve been testing the initial prototype hard for a week

grass is the worst surface for the diffs

both the blue version being used in the vid (tarmac and woods) and the original 2 piece brace have clicking on the grass.

here are some pics of the blue one

This is what you will get in the kit...

 

And here it is fitted to the beetle

we’ve tried a set up that clamps the diff fully until it doesn’t move and I’ve just received today v.6 with 0.0mm, 0.2mm and 0.4mm degrees of additional clamping.

plus I have the brat/frog version for fitment testing.

should have some more results after the weekend 
 

Thanks for your patience peeps

 

JJ

[ruebiracer 1046]

It´s a well made construction and design, but you Maybe should also think About the bearing Nylon housings, the white ones. They have very few material to hold it against popping out of the side plates. There may be some flex left, you do not catch with your braces onto the aluminum side plates.

Hope you know what I mean. Maybe there is some improvement potential left.

 

Kind regards,

Matthias

[Xeostar 815]

16 minutes ago, ruebiracer said:

It´s a well made construction and design, but you Maybe should also think About the bearing Nylon housings, the white ones. They have very few material to hold it against popping out of the side plates. There may be some flex left, you do not catch with your braces onto the aluminum side plates.

Hope you know what I mean. Maybe there is some improvement potential left.

 

Kind regards,

Matthias

Hi,

Yes that is a very good point. I'll take a look at that piece see if there is any room for improvement. Its a fairly tight fit in the pressed pate so it might be hard to get more material in there but I'll take a look.

Pete

[Problemchild 2149]

Yeah agree - there is only about 1mm there but can certainly be looked at. 
 

the main approach has been to limit flex across the long metal side plates

cant wait to try the next versions 

more pics and vids coming soon - go away rain

JJ

[KEV THE REV 2312]

1 hour ago, Xeostar said:

you do not catch with your braces

Couldn't help it - sorry

[Problemchild 2149]

Test fitting of the brat/frog version of the brace that wraps around to protect the gearbox from grounding 

 

This wrap around version will also be able to be able to be purchased (in red and black)

Thoughts??

JJ

 

 

 

 

[KEV THE REV 2312]

This looks good too . Once all tests have been done can we make our final purchase choices based on the results and styles / types  ?

[Problemchild 2149]

Yeah course - we aren’t gonna hold anyone to anything - it was just to get an idea

 

just dealing with dogbone issues and a snapped servo horn - the beetle is too fast and take a few too many hits

JJ

[Frog Jumper 3658]

12 hours ago, Problemchild said:

Thoughts??

 

[Problemchild 2149]

Hope they look good and function well

JJ

[jlcox7 16]

Yeah, I really like that last design that goes all the way around the bottom - got 2 beetles in the pipeline that will need them when you are satisfied with your design - really impressive work there!

 

[Problemchild 2149]

I have beetle issues at the moment 

testing is on pause 

I snapped a servo output shaft (innocuous hit) and then all the electronics started glitching which I think was a dying ESC as it was taking a lot of draw through it (connector, motor and ESC getting hot)

awaiting some new parts but I’d given it a good smashing in the park with no issues apart from the CV joint binding (will post a vid in a bit)

JJ

[Problemchild 2149]

Latest vid of testing 

 

the only noise is the unloaded rear wheel spinning at such a rate the tyre balloons and the CV joint binds

 

JJ

[Problemchild 2149]

So we think these are ready to go into production.

so a reminder 

red or black

beetle or brat/frog (I.e. no rear bumper)

 

JJ