Cold Fusion is ready to roll... - Page 3 - RC-Monster Forums

Sylvester · 02.11.2007, 11:43 AM

Nice vids Dagger! Pretty quick. Hopefully that diff comes out soon enough!

Dagger Thrasher · 02.11.2007, 06:31 PM

Well the gy who's designing it is kindly going to send me the prototypes to test (he plans to make a "normal" 6-spider sealed diff and a Torsen). He plans to use the existing dagger glass-fibre reinforced nylon teeth ring for both designs (you need to see a pic really if you've never seen a Dagger diff), keyed into a 7075 aluminium main cup. This will then house the 1/8th scale diff parts, although he's not said which actual make. He's not said that much at all about it really, but assures me it's going to be uber strong! :)

ncalenda · 02.12.2007, 12:31 AM

wow, you did a great job on this, looks really nice, and saw the vid, looks fast!!

TruckBasher · 09:04 AM

Nice video....

Cool someone's making a bulletproof diffs for WD/TD...Is it the same guy that made your chassis?

Keep us updated

glassdoctor · 02.12.2007, 10:40 AM

Dang bloody cars! You need to put up a road block, hee hee. The last clip looks like you opened it up for a second... looks pretty quick :)

Sylvester · 02.12.2007, 05:52 PM

Cant wait to see it on some dirt! :)

coolhandcountry · 02.12.2007, 10:20 PM

I would like to see it with a little more room. I bet it would get down.

neweuser · 02.13.2007, 10:34 AM

Quote:

Originally Posted by coolhandcountry

I would like to see it with a little more room. I bet it would get down.

I agree with Leroy. it would be nice, and even for you I bet, to get that thing into a football field or something and really stretch her legs!

Dagger Thrasher · 02.16.2007, 02:41 PM

Sorry for the late reply guys. Tell me about it tho, I am busting to get this thing to a biiig carpark or field and see what she can really do! But before I can do that, I've firstly got to get this diff issue fixed...and secondly get a decent radio system. I'm STILL using a 27mhz AM radio *hangs head in shame* which is suffering from serious range reduction...so I'm looking at getting myself a Nomadio React as soon as I can afford it. From what I've seen, this truck has a lot of speed to be unleashed lol!

Truckbasher: Nope, different guys. The guy designing the diff lives here in the UK, and work is slowly going along...although there might be some problems (such as finding suitable diff outdrives, etc). Hopefully it'll go smoothly though. The ability to use diff oils will certainly be nice...everytime CF corners under power, the front diff unloads like it's going out of fashion lol. I should mount a truggy wing on this thing too, but fitting one could be tricky.

Quote:

Dang bloody cars! You need to put up a road block, hee hee. The last clip looks like you opened it up for a second... looks pretty quick

Yup, those cars were a nightmare lol! And I think you're right, that must be the clip where I blipped full throttle for just a split second...and then panicked lol. Like I say, I'll get this thing running again ASAP and get a decent video done. Thanks for all the compliments! :)

TruckBasher · 02.16.2007, 06:24 PM

Great to know your getting "local support" :027: ...I hope things will work out fine. I guess you'll be fitting at least a 6mm outdrive or a buggy diff would definitely make CF fly :028: ...

Cant wait for the next video

glassdoctor · 02.16.2007, 10:45 PM

Quote:

Originally Posted by coolhandcountry

I would like to see it with a little more room. I bet it would get down.

No... someone needs to lean over and step on the gas pedal for him! :005:

It has some quicks but it looks like it was only punched for like 1 second once or twice. careful careful :eek: ha ha ha

Dagger Thrasher · 04:46 PM

Well, it's been three months...and I finally have the new diff! Sorry for bringing an old topic up, but I don't think this needs a whole new topic. Here it is:

This is the very first prototype diff that I've been sent to test. The outer gear-adaptor and inner diff cup are machined 7075 aluminium, with Savage 4-bevel innards. The whole unit is sealed so it can be filled with oil, and uses custom-modified 6mm outdrives (can use 8/9mm if required) and flanged bearings.

I got it all installed in the rear today and filled it with 3000wt oil in preparation for another test run...which in summary, went very well! The power and speed was incredible as it was a hot, dry day and I was able to go to the local park to really open her up...and WOW it's got some top-end! I reckon it was pushing close to 50mph on grass (with lowest motor timing), and I feel it could've gone faster still with a bit more room. While I didn't drive aggressively, the diff and everything else held up excellently. The truck also handled rough ground at speed really well, and cornered with very little chassis roll. It was very predictable and easy to drive.:027:

However...not everything went well. It was fairly hot outside (somewhere between 80 and 90F) and the rear motor was overheating far too easily. After doing several speed runs, the temperature (via telemetry) was already hitting 160F...and at one point, touched 190. I wasn't driving anythere near all the time, so this definitely needs looking at. For the time being I'll see if I can fit a fan, but hopefully a colder day will help.:013:

And I know, still no proper video yet...but I WILL get one I promise! Anyway I'll stop blabbering now lol. Thanks for looking.:018:

Serum · 05.23.2007, 04:57 PM

Holy COW! that's a diff for a 1/10th vehicle!!

Very, very nice!!

Who made it ?

05.23.2007, 05:01 PM

Ya, very cool!

@Serum, I think FLM made it, not sure though...

Bye:018:

Dagger Thrasher · 05.23.2007, 06:43 PM

Pretty beefy isn't it! FLM didn't make it though. It was designed by Henry Weaver, a friend of mine (he's on www.rckingdom.co.uk forums) who's currently at college studying an engineering course of some sort. He really came through with this. Ever since the Dagger was released in 1999, people have been trying to improve the stock diff; and now that both I, and shortly he, have brushless Daggers the need for a stronger diff was urgent...so he set to work with his expertise, and some tips from me.:018:

I'm not sure if CF does qualify as 1/10th any more though; it's got a longer wheelbase than the stock Maxx trucks, but is slightly narrower...so I dunno. 1/9th? lol. The original Dagger is considered 1/10th and this thing is much bigger than that now in every dimension. Who can say? She weighs 3.7kg too, fully laden.

Anyhoo, I've now gotta go off and fiddle around with CF's CVDs...two of the drive pins backed out a bit during the run, so they need sorting (I'll probs put shrinkwrap round them to stop it happening again).:027: