ph2t

[ph2t]

nah mate, no 1:18 is on the boards for now. There’s just too much work with my current product line as is.

cheers,

ph2t.

[ph2t]

News from nelly land…..

First things first, the shop is now open!

Nelly v1.2 and v1.3 are available for order. Nelly deluxe will be in the shop within the week. Just finalising some documentation changes since the installation has extra steps involved.

and a few other things….

The design of an all n-chan MOSFET h-bridge was unsucessfull. The problem lay in the abilty to switch the top half of the h-bridge well enough.

Since I switched out the pchan mosfets for nchan mosfets I needed to be able to invert the signal going into them. In realy simple terms the nchand mosfet turns on when it’s gate voltage approches Vcc. With a pchan, it gets turned on when it’s gate voltage approaches GND or 0V.

The inverting was simple, using some appropraite INVERTING mosfet drivers. The issue was the path the gate drive current needed to take between it’s gate pin and GND.

With nchan mosfets in the top half of the h-bridge their source pin is not directly connected to ground. The source pins “gets” the ground so to speak though the bottom pair of mosfets in the h-bridge. This path for the current to flow was only available to the mosfets on the top half of the h-bridge when the bottom mosfet was turned on.

A lot of tech crap I know but in the end the top half, nchan mosfets have little chance of turning on properly since they don’t have straight access to the ground.

That’s why traditionaly p-chan mosfets are used in the top half of a h-bridge, their current flows from Vcc to gate. This path is a direct connection just like the nchans path from gate to ground.

oh well, one can keep trying…… there’s more than one way to skin a cat!

cheers,

ph2t.

[ph2t]

in the end it was 5 days, but it’s open now! lol…

cheers,

ph2t.

[ph2t]

you gonna tell ’em about those matching alloy rims you got now?

lol..

ph2t.

[ph2t]

the shop will be open again within the day!

ph2t.

[ph2t]

cool! now we have too we can race in onroad configs at templestowe!

ph2t.

[ph2t]

lol, you got the ferrite magnet version of the plasmatomic. How is the torque? I wonder how the response would be with a neo magnet version.

cheers mate,

ph2t.

[ph2t]

btw, welcome to the forums dude. then nelly shop will reopen by the end of the week.

cheers,

ph2t.

[ph2t]

dude, just break it in dry for 30 – 40 minutes in the direction that is forward for your chassis…. that’s all you need to do.

Lipo cells may not blow the fets if you stay with the stock motor. Anything slightly hotter whilst on lipo’s will prolly blow the PCB.

cheers,

ph2t.

[ph2t]

Quote:

one question, how do you break a motor in using water:question:

after all those cold ones he had, I doubt it that he used “Water”, ha ha ha!!!

ph2t.

[ph2t]

lol, merc, please be a little bit more respectfull to biohazard, he’s as old school as it gets when it comes to the micro scene.

Hell I still remember Bio’s green truck with the carbon fibre hood. That was one of the first fully modded bits I saw before I even got into the scene.

ph2t.

[ph2t]

yeah, spill….

[ph2t]

very nice z, I might have some spare mr01 CF hplates if you need them, let me know..

what’s the red shell? the trueno? I have no idea…..:approve:

ph2t.

Edited by – ph2t on 01 March 2005 15:14:21

[ph2t]

dude, that’s effin’ cool… I see what you mean by not being *true* hydro, but hell, it’s still great to watch!

ph2t.

[ph2t]

just a followup on this thread….

I finally got a chance to take the mr02 down to templestowe for the day.

WOW!

It was running a nelly and a very fast plasma/atomic motor and it handled great!

Just the oil shock and thin h-plate was all it needed. So much for roll shocks and the like, looks like they might be overkill…

Anyways, the dampening effect of the oil shock (without spring) is amazing. I can’t stress enough how this single addition changed the way the chassis behaved….

Also, the MM motor mount really helps with high speeds. It’s hard to explain, but when the chassis would hit a disturbance the car would act like an arrow and naturally dampen itself, staying forward. The RM motor mount would normall spin out in this situation…..

I have a question though. I recently scored (like, today!) some ATOMIC damper oil that is meant to be the thick one (1000 grade ???). I’m currently using the 300 grade I got with the oil shock.

My question is what will happen to the shocks dampening characteristic when running a harder oil? Is a harder oil more advantageous when running at higher speeds?

Any feedback would be appreciated…

cheers,

ph2t.

[ph2t]

gandini racing foams mate, they’re the best, you can get ’em here, at the shop.

ph2t.

[ph2t]

how do you find them mate? do they change the madforce’s handling? I guess the front end must be pretty stable now. I trust you’re using alloy damper mounts as well. the whole front end must be pretty tight now…..

nelly’s will be ready soon mate, soon…..

ph2t.

[ph2t]

dunno about anywhere retail in aus mate. I know some hobbyshops stock mr01’s. dunno if they stock mr02’s. your best bet is to call your local hobby shops and see how you go.

where are you in aus?

an OL will take more surfaces, mr01/mr02’s aren’t good for carpet.

ph2t.

[ph2t]

http://www.rcmart.com

[ph2t]

no. the servo saver construct (on mr02, iw02) improves the realiability bigtime…..

I’m pretty sure azzachaz maybee aaron (site admin), but I can’t say for certain…..

if you can spare the $$, go the mr02. superior in many ways…..

ph2t.

[ph2t]

we’ll see…..

so far the plasma is the fastest for me. A lto of these fellas run on small dick RCP tracks. They have no idea what top speed is…..

lol…

ph2t.

[ph2t]

hopefully within the month. as for nelly I’m still waiting on parts… once I’ get them in I’ll build yours and ship it out.

cheers,

ph2t.

[ph2t]

no, not yet. been too busy with work….

if you want the motor back just say….

ph2t.

[ph2t]

dave, you’re correct, the longest RM is still shorter than the MM.

you putting that SLR on a MM chassis? I’m keen to hear how it handles.

the mclaren F1 shell (which I got in this MM RTR) is a great shell for racing, sits low and doesn’t detract from the handling.

The supra is good too. So far it is handling well inside. The real test is outside, but I’m waiting for my concrete to dry after a day and a half of continous bloody rain!!! arghhh!!!!

here’s some closer shots of the rear wheel wells, sorry about the bluryness.

ph2t.

[ph2t]

I’m salivating already!

[Author]

Posts