darrenelmslie

Now sorted!

Good points - thanks both 👍 My motor mount does have some adjustability so I think I'll be okay but will definitely check. I have changed out my 57t steel spur gear back to a stock 57t nylon one initially. It was pretty noisy and I'l like a little bit of give in the system. I'll see how I get on with that and perhaps try a few different pinions based on how it's driving. The Max5 is a Gen2. I'm definitely keeping 8s as my battery limit though. I was wondering about trying some LiHV packs - my charger supports them after I upgraded the firmware and there seemed some pretty decent options on AliExpress. In the end I've decided to go with regular LiPos for convenience. Comparing both motors is a great idea - I'll do that and share the findings. I think the Max5 Gen2 has a logger? l can also get a GPS speed reading and use an IR heat gun on the components.

Thanks Tug, much appreciated 👍 I'm just stripping it down at the moment to clean it up and make sure everything's done up properly. On a related note. I used to run the Toro Beast 780kv as I mentioned. I've also got a 780kv Leopard motor doing nothing which I could fit while I've go it apart. Looking at the specs, I don't *think* they're both pretty close. Would you opt for one over the other? Dunno how the windings impact them if the Leopard really is a 2.5Y. The internal resistance and current handling seem better on the Toro, although I suppose that means it could put more strain on the ESC sometimes. The Leopard is a fair bit lighter. Leopard LBP5892/V-2.5Y Winding: 2.5 Wye (I think?) Internal resistance: 0.0088 ohm Max Current 120A Max power 6000W Weight: 1020g Toro Beast X528 2Y Winding: 2 Wye internal resistance: 0.0061 ohm Max current: 193A Max power: 7350W Weight 1581g

After a 6 year leave of absence I've found and dusted off my electric 5B again. It got put away after it's last run when the Toro Beast ESC popped and one of my old Thunder Power packs was no longer recognised by the charger. Fast forward to today and I've got a Max5 Gen2 and some new 4S lipos to put back in it. I'm looking forward to running it again and I think my son is going to love it too 🙂 It's still got a Toro Beast 780kv motor in it I had to remind myself of some of the mods I'd done to it because it's been so long I'd completely forgotten.. I'd like to make sure the gearing is right - can anyone sanity-check it for me? I'm running 8s power, on grass with Hostile MX tyres. Not so interested in outright speed but I'd like wheelies on demand . I've got a 57T spur fitted at the moment. It looks as though I was running an 18T pinion originally and have a 15T in the spares box. Do either of those sound like they'd give what I'm after with that spur gear, or should I be looking at something different? Thanks for your help! Darren

'ey up...🙂 I have a pair of 780kv motors on the bench to choose for my 1/5 scale HPI Baja 5B, Can anyone advise if one is any better than the other? They are; Leopard LBP5892/V-2.5Y Winding: 2.5 Wye (I think?) Internal resistance: 0.0088 ohm Max Current 120A Max power 6000W Weight: 1020g Toro Beast X528 2Y Winding: 2 Wye internal resistance: 0.0061 ohm Max current: 193A Max power: 7350W Weight 1581g I think they're probably pretty close to be honest... the Toro may have the edge due to it's lower internal resistance and higher current capacity? although it comes with a weight penalty. I'm not sure how and if the 2.5Y vs 2Y windings plays into it....

I have one on order. It won't land tho (haha) until next year. It is controllable via app or the tracker/wrist controller. It's a shame there's no collision avoidance but no doubt that'll come. I'm also looking forward to my Robugtix TX8 arriving sometime soon. I must remember to forewarn the kids tho, it's spookily spider-like and the last thing i need is one of them stamping on it Sent from my iPhone using Tapatalk

Cheers Kangarilla. Will try Outlaw Graphics also Sent from my iPhone using Tapatalk

I'll get in touch with Louse and sound her out Tug, thanks for the pointer. If you get a chance to ask the question of your Canadian guy, that'd be great flatout! Not that there's much rush at the moment! lol

I was weighing up both controllers and although I think the Alien would do just as good a job as the MGM (and cheaper!), I really didn't like the control software as much. For me, that was an important factor. I also liked the fact it is monitoring motor and battery temps, and can use them as watermarks for shutdown. Time will tell whether I've got reliability or not...

what a cheek! It's one of the new 800A ones.. Surely nothing can blow that up! Okay....It's *not* an 800A

Yes, I was thinking stick-on decals. No-one I've contacted yet seems to be able to help..

It's taken a back seat recently I'm afraid. A few things've cropped up which mean RC has taken a bit of a back seat. I dusted the shell off last week however and have removed the flashing from around the edges. Next step is to sand and fill a few areas. I'll be taking the cutting list to B&Q again next week so hopefully something to report soon.

Sold! Sent from my iPhone using Tapatalk

I was going to use it for my 5ive project, but I've opted for an MGM instead. I'm half-tempted to keep it sitting on the shelf, but I seem to be stockpiling ESCs; it's getting ridiculous As it's you, you can have it for 150 if you want it. Of course, if you want to offer more than 160 for it, that's okay too

As title. Bought from Bruno last month and no longer needed. http://r.ebay.com/EdFTH4 Looking for

Please close

Vario large carbon Airwolf (part no. 2003) which is designed for the Vario SkyFox, Extreme and petrol mechanics. These fuselages have also been succesfully fitted with Trex 700 airframes to good effect. This fuselage was to be a second build as a shelf queen but after a couple of years I haven't had time to finish the first fuselage! This is taking up space and should go to someone who will build and fly it. http://www.msuk-forum.co.uk/gallery/image/32875-/ http://www.msuk-forum.co.uk/gallery/image/32877-/ http://www.msuk-forum.co.uk/gallery/image/32876-/ http://www.msuk-forum.co.uk/gallery/image/32878-/ http://www.msuk-forum.co.uk/gallery/image/32879-img-1584/ It is complete and untouched. Also comes with Vario's Airwolf CD (part no. 3612). Scale is 1:7, overall length is 1.8m , width is 550mm, height is 480mm and it swings a 1.8m rotor disc. All-up weight is about 7kg This currently retails for

...or it never happened! Sent from my iPhone using Tapatalk

Sorry, you're right Jari. kV is usually taken unloaded. Motor wattage value would be maximum power, so generated at maximum rpm.

Very true, factor in resistance, efficency and whatnot and the maths will always be out. It *is* staggering though, how powerful brushless motors are and I guess they're only getting to get even more powerful and efficient. The last 5 years have been tumultuous in terms of RC electonics. It's an exciting time to be living though that's for sure Jari, strapping a known weight to the car and running the same tests as before would make for some extremely interesting results. The kV figures are in the main, I believe, unloaded ones (Leopard's are taken with a light load) and must surely corrolate to the wattage ones

Oh, I forgot to mention. You can hack the high voltage (150A) eagle tree logger to double its current measuring capacity to 300A. Pretty useful stuff.. There's info on the net but it's very simple. the boat guys seem to do it a fair bit Sent from my iPhone using Tapatalk

Thanks both, interesting stuff. Especially your thread Jari. Yes, manufacturers motor wattage will be quoted at the motor max voltage. Do you happen to know the wattage rating of your motor Jari? That 1900kv Hobbyking motor is apparently rated to 2200w max which will be at 5s. Given your max draw at 5s, I make that just over 1900w, What I still don't understand is this; the maximum wattage of the motor is just that isn't it? An absolute maximum. Putting it under a load such as terrain/gearing/friction will never increase this right? So using w=iv means i can calculate maximum current for maximum motor demand? [EDIT] Doh - I've just realised that the wattage the manufacturers provide will be the unloaded value. Applying a load externally, presumably pushes this up to whatever figure can be reached until the weakest part in the chain breaks (to take an extreme example, if for example you could lock the shaft stationary and then apply maximum voltage) Being able to measure current draw/watts is the only way to accurately tailor a system in that case

I've been trying to increase my understanding of brushless setups in relation to large scale. I've read through Garrys excellent articles and have been Googling topics until my brain has started to What I think I know so far is; Pack Voltage x motor kV = theoretical/no-load max rpm for the setup. Moving greater weight requires more torque, so a more torquey motor is beneficial to reduce strain on the system Lower kV motor = Lower rpm / more torque. A larger pinion is needed (larger pinion = more speed) to maintain speed compared to a higher kV motor Higher voltage = lower current = less heat. So is it the maximum wattage of the motor that dictates maximum current draw in the circuit? say for example a 6,000w motor running on 50V will draw a nominal 120A

Sweet! it doesn't look as though you're using the ESC fans either. Is that the case? I've taken the plunge and ordered the same Alien ESC which I'm hoping to run a Neu 2028 Extreme that's been sitting on the shelf, on 12S initially, although a lower kV motor would be ideal. Looking forward to it based on your results!

Cheers for that, much appreciated. I've not had any luck so far with the 2 places I've tried contacting. The decals would be pretty simple in design terms I think. Essentially it's;