HPR135, LMT3060, Hifei300 my first build

**Yamadori** · 04-02-2014, 04:05 AM

Maciek,
Are you sure you will be able to squeeze those 3060 in sponsoons of hpr 135.
And yes, they are very heavy
What I know is...I have mhz 1850 with 2x3080...and eveybody was telling me that I should have 3060 instead...that 3080 are almost too big for 1850.
Now, if 3060 would be suficient to drive 1850 with additional 6kg of batteries...maybe they are really too big for hpr 135.
I believe hpr 135 is 1300mm.
I have H&M Agitator hull 1300 built with 2x2250...on 2x6s..and it goes like crazy.
That's just my experience.
:)

**Maciek74** · 04-02-2014, 04:22 AM

Thanks Yamadori :)
iam not sure of anything yet :) in MHZ 1380 they looked quite ok, i wont be sure untill i get hull, Hanspeter told me its ment for 10S max with LMT22 series, but who knows how this will work :) maybe ill oversize props a bit for 60mm? :) crazy ideas sometimes pay off :) i can always change motors to TPP

**nata2run** · 04-02-2014, 08:36 AM

Congrats on your hull. HPR is a piece of art by it self!! As many may have told you, yes the LMT's are too big considering that a set of 3040's can punch that hull to over 120mph. The 15s is fine if you can keep the weight to about 1600g per side (maybe 15s 3500mah) it's all about weight and not the volt you run. More volt less amps, to reach a desired watt...make sense? How ever 15s is not a practical lipo configuration in a hull like that. 14s would be ok for even distribution of packs on each side, but 500kv is not optimal unless you run huge props. You still only around 30k loaded. It's enough, but still not optimal. I would not recommend to use those motors though.

**ManuelW** · 04-02-2014, 08:49 AM

Hi Ernest,

mhh I think I've built a couple of HPR 135 and sorry to say it the hard way but I dont think that will work in a way you are satisfied.

So I have two proposals:
-HPR 135: Use the TP 5850/1150kv motors on 8S each in your 135. I'm running the exact same setup in a BK Bandit XL (catamaran, slightly bigger than HPR 135) and its runs beautiful. Top-Speed with X457 is close to 140km/h, with very good lipos 140-145km/h are possible and you may still upgrade to 2x 9S.

-big setup with 3060/14, Hifei 300A: That is overkill in a HPR 135 but would in my eyes be a beautiful setup in a HPR C5008 "Mystic-Style". It may sound as not too much rpm but I fully agree with Kent that 14S per motor are enough. Plus you can spin props like Octura X470 full sized (!) and still get to decent speeds plus some nice runtimes. The electric 233 run 3080/8 on 12S which is about 12% more rpm but also higher load and on X470 cut down to 60mm those boats run serious speeds.

So in case you have those two sets of motors I'd build two projects suiting them.

regards,
Manuel

**iridebikes247** · 04-02-2014, 09:36 AM

I'd keep those big lehners for another build and throw in the 5850 motors. I have tested 1000kv on 11s very strong lipos, and 13s on 920kv with weaker lipos.

There are quite a few guys on here that will help you with that hpr, you have a nice stock of parts to work with this will be a great boat, I'm not sure exactly where you're located and your experience with prop tuning but spending some $ on props is a good idea. Andy Brown is the guy most of us turn to, I never realized fully the potential of these things until professional prop tuning.

**Maciek74** · 04-02-2014, 09:53 AM

Thanks guys :)
Who wants to buy 2 Lehners 3060/14?!?

So far ill give it a try, diference in weight between 3040 and 3060 is 210gramm if it wont work ill put TPPs in there which are already on shelf :) but so far i have around 2,7kg per side so its really heavy according to Natas suggestion, but even on TPPs (960gramm) it will be around 2400 so still quite heavy...

1850 hull is no match, i would have to buy trailer for it :) so far we re working on HPR135 and nothing else :)

regards
Ernest/Maciek :)

EDIT: iridebikes, i live in Szczecin/Poland quite far from you but airmail works great these days :) how can i contact Andy and what props will you advice?

**iridebikes247** · 04-02-2014, 12:55 PM

www.cmdracing.com

As far as rec. goes a lot depends on which motor will be run. If running the tp motor an octura x457 would be great, i'd order up 2 sets, it totally sucks if you lose a prop then have to wait 5 weeks to run again. Perhaps some others can chime in on the more aggressive stuff.

Andy Brown is quite reasonable with pricing if all you ask for is a balanced and sharpened prop.

**nata2run** · 04-02-2014, 11:18 PM

Maciek, Ive found the heavier the HPR, the harder it is to drive! Don't get me wrong, a heavy hull can still go fast! but there is no point in any way of you installing the 3060's, specially the 500kv version, that require 14-15s to run. As many have told you, keep them for the next 70"+ build. If you really want LMT, 2280's or 3040's are right on the money for that boat! and both 3040's and 2280's are happy to spin higher RPM's. You will also find it easier to control the boat with smaller props, but for that you need the higher RMP's also. I'm not saying the setup will not work, simply stating you should reconsider your choice of motors and cell count. 8s-10s is a nice setup for a HPR135 spinning 35k-45k RPM and a few different prop choices.

**Maciek74** · 04-03-2014, 12:53 AM

Hey :)
guys iam already convinced to get smaller motors, those 3060 iam treating rather like experiment not final setup now :) just after i calculated 1150kv TPs on 8s will draw 275 amps max since my ESCs are only 300/380, how do You think should I be afraid of this or the margin of error is enough? anyways its still 2,5kg per side including packs (probably more).
What motors and kv will You advice? how about 12s setup per side, it will make less Amp draw and easier to setup since i already bought 6s 60c lipo packs. Where can i buy bare props of this size? i would like to sharpen and balance them on my own to have comparison to those from Andy :) and where can i order those distance nuts to screw main board above tunnel?

Regards Maciek

**nata2run** · 04-03-2014, 01:59 AM

Well, firstly 2,5kg per side including motors is fine. If 5000mah then good chance it's less. My big packs 6s 5800mah are 825g each so if I ran 10s then just over 1300g per side. My 3040's are 1170g. So yes under 2,5kg is quite possible. Regarding the setup and your ESC's I wouldn't worry, I honestly think they will hold up! Of cause running big props on the maiden without knowing how the hull rides is not a good idea. You can run 12s if you want with motors between 800 and 1000kv with various props, and motors around 1000kv will run on 10s also so you have options there.

**Maciek74** · 04-03-2014, 04:09 AM

What about these props, anyone used them? are they good, bad or reasonable? i see a lot in different sizes on Ebay>>>
http://www.ebay.com/itm/VXP-V959-3-R...item486138998e

**nata2run** · 04-03-2014, 05:25 AM

You are more than fine with 2 blade props. Honestly. A lot of people has gone insane speeds with modified octuras

**Maciek74** · 04-03-2014, 10:06 AM

yep, and i like their price better, but on every vid these are on 3 so i thouht 2 are for single motor setups, now iam wiser :) thanks :)

**Maciek74** · 04-19-2014, 01:23 PM

Finally i got the hull, its beautifull and very hard and strong, now i will start questions time :)

First question is how far can i put end of drives and propellers behind back of hull, minimum that i measured today for my Click Drives is 43mm (from stern to tip of drive dog). What is the rule? shorter is better, or maybe longer, or some positioning to rudder?

Regards
Maciek

HPR135, LMT3060, Hifei300 my first build

HPR135, LMT3060, Hifei300 my first build

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