RunRyder RC
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 2257 views POST REPLY
Home✈️Aircraft🚁Helicoptere-Hirobo Embla - SRB Quark - Lepton › Hirobo Lepton EX part...
01-26-2016 04:14 AM  4 years ago
Topic Vote0Post 1
dkshema

rrMaster

Cedar Rapids, IA

MyPosts All Forum Topic
Hirobo Lepton EX part...
I came across a Hirobo Lepton EX yesterday -- was given to me so I could find it a good home. It looked to be in excellent shape. As I was going over it last evening, I discovered the magnesium main channel is broken at the rear end, allowing the motor to move around.

Does anyone know where I can find a Hirobo 0304-029 magnesium main channel for the Lepton?
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-26-2016 04:40 AM  4 years ago
TMoore

rrMaster

Cookeville, TN

MyPosts All Forum Topic
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-26-2016 10:26 AM  4 years ago
Mike0251

rrVeteran

Hills of the Blue Ridge VA

MyPosts All Forum Topic
It is very weak in that area. $25 plus shipping from RCJ per Terry's link. The very back bone of the Lepton.
Terry if your bored let me know and we can create a science project..lol. I can whip that part up in cad either as a sheet metal part or machining. Maybe 6061-T6 instead of magnesium. The lepton can handle the 34% weight increase for this small part. It weighs 19.5g so aluminum would be another 6g.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-26-2016 03:21 PM  4 years ago
TMoore

rrMaster

Cookeville, TN

MyPosts All Forum Topic
Do it. I don't have any of those parts in the spares inventory and we should be able to get some aluminum that is close.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-27-2016 01:00 AM  4 years ago
Mike0251

rrVeteran

Hills of the Blue Ridge VA

MyPosts All Forum Topic
Terry, I was able to get the base form done tonight. I will add all the holes and mounting features in the next day or so as time permits (still working a demanding Aerospace job..lol). I've done this with the sheetmetal program to start as it is cheaper to mfg than a full up machining. But will do one of those too. PEM makes a 2.5 press nut whereas Hirobo specs 2.6. I do believe the 2.6 fastener will work with the 2.5 insert. I will be able to provide both the as built file as well as the flat pattern file in iges/step/or others as needed

SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-27-2016 01:16 AM  4 years ago
TMoore

rrMaster

Cookeville, TN

MyPosts All Forum Topic
Step would be fine. What system did you design it in?

I'm going to machine it out of billet.
Part 107.
The only ZERO flight hour certificate in the world.
It's like getting a driver's license without the driver's test.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-27-2016 02:04 AM  4 years ago
dkshema

rrMaster

Cedar Rapids, IA

MyPosts All Forum Topic
Looking good from here.-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-27-2016 10:12 AM  4 years ago
Mike0251

rrVeteran

Hills of the Blue Ridge VA

MyPosts All Forum Topic
Ok T, I will modify this (another one) for machining then. Will add boss's for tapped holes instead of pems and streamline for that process.
I am using SDRC Ideas that I still have on my laptop, use NX at work now.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-27-2016 05:12 PM  3 years ago
TMoore

rrMaster

Cookeville, TN

MyPosts All Forum Topic
The sheet metal part looks great but machining I have, press brakes no.Part 107.
The only ZERO flight hour certificate in the world.
It's like getting a driver's license without the driver's test.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-27-2016 05:14 PM  3 years ago
Mike0251

rrVeteran

Hills of the Blue Ridge VA

MyPosts All Forum Topic
I caught that..lol. I will design for machining.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-28-2016 12:19 AM  3 years ago
Mike0251

rrVeteran

Hills of the Blue Ridge VA

MyPosts All Forum Topic
I will work the motor mounting next. The slots may be a close fit to the forward frame bosses. Will see...there's a reason they folded it HA!
Edit- Almost made it to dinner. I think it would be better to remove the bosses all together and use the PEM nuts. Simplifies machining greatly and the PEMS are cheap and available from MCMcarr.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-28-2016 12:46 AM  3 years ago
prototype3a

rrApprentice

Christiansburg,VA

MyPosts All Forum Topic
Dang. I wish I had a part in these shenanigans. You're going to make me update my old Lepton 3d model.~Drew
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-28-2016 01:44 AM  3 years ago
dkshema

rrMaster

Cedar Rapids, IA

MyPosts All Forum Topic
I will be more than happy to be a beta tester..-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-28-2016 01:50 AM  3 years ago
TMoore

rrMaster

Cookeville, TN

MyPosts All Forum Topic
Good work.Part 107.
The only ZERO flight hour certificate in the world.
It's like getting a driver's license without the driver's test.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-30-2016 02:24 PM  3 years ago
Mike0251

rrVeteran

Hills of the Blue Ridge VA

MyPosts All Forum Topic
Terry the machined version is complete. IM me your email and I will send you (2) step files (not big). One for the part only and one with PEMS installed. Dave looks to be the acceptance test person here
After you review if there are concerns or design modifications you might like it's no problem, it's CAD baby!
Design Features:
*Commonality throughout for holes
*Motor mount slots increased in length slightly
*One vertical slot by motor mounting was omitted as it is not used for anything and wanted more strength in that area
*MCCarr #99437A125 PEM 2.5mm PEM nuts installed, requires 4.5mm hole .177", should play well with Hirobo 2.6mm screws (verify) $6 for 10
*Sides were kept at .060
*Base was increased to .065 from .060
*Weight is 29g, 10g more than the OEM part

SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-30-2016 05:52 PM  3 years ago
prototype3a

rrApprentice

Christiansburg,VA

MyPosts All Forum Topic
I was just thinking it would be nice to make a new battery back stop from sheet metal that attaches to the frames instead of the 'spine'. Changing the position of that battery stop was always such a pain.~Drew
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-30-2016 07:01 PM  3 years ago
dkshema

rrMaster

Cedar Rapids, IA

MyPosts All Forum Topic
Looking mighty fine.

To me, if I need different screws to make things work, that's no problem. Hardware is hardware, easy to source, and inexpensive. These aren't really consumables, they should last "forever".

The Lepton I picked up was one I had maidened for a local flyer several years ago. It's been sitting in his hobby room ever since, maybe has somewhere between a dozen and 20 flights, with no crashes. As I was looking it over, I noticed that one of the tabs near the rear was broken, allowing the motor to move around. List for that part is $45, and no stock in the US. As Terry's link showed, I think I can source the original from RC Japan, but again, the price, with shipping would again be pretty steep. All that, and I am still concerned about the mechanical longevity of the magnesium part.

The Lepton was a heli introduced before it's time, and remained quite expensive, even after better alternatives arrived on the market. Price and its "uniqueness" in the hobby kept me from purchasing one.

A machined aluminum replacement looks to be a viable, less costly alternative, and I suspect, more serviceable in the long run. 10 grams isn't a real problem -- motors and batteries have come quite a long way since the Lepton was introduced.

Speaking of motors, this one has some form of Hacker -- I haven't even looked at it to figure out what Hacker it might be. Since the center spine fatigued and broke in just a handful of flights, I'm going to take a close look at the motor itself, perhaps it vibrates a lot, and perhaps there is a better choice these days.

I'm eager to see the final product, it looks good on paper.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-30-2016 08:07 PM  3 years ago
prototype3a

rrApprentice

Christiansburg,VA

MyPosts All Forum Topic
One of the Goblin 380 motors would probably be a good choice for the Lepton these days and especially so on 4s or maybe 5s. The gearing on the Lepton basically makes 6s a no-go. But a light weight medium headspeed setup on 4s should do very well.~Drew
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-30-2016 08:18 PM  3 years ago
Mike0251

rrVeteran

Hills of the Blue Ridge VA

MyPosts All Forum Topic
I have two left. One on the board for sale as you all know.
My personal one uses 4S and a Scorpion HK-3026-880/22T
The for sale also uses 4S and a Hyperion HP-HS3026-0880/22T
The both fly very well with that gearing. Once upon a time I had mine set up for 5S but it was a pain the arse getting that pack in and out. It was damn fast though...LOL

As for the battery back strap stop, OMG you are not kidding that is a pain to move! No more though since I got these set up the way they are.

The magnesium OEM sheet part is of course lighter and stronger than a sheet metal aluminum part. But it fractures more so then bend. The part as designed for Terry keeps the machining intricacy to a minimum. I could of course add additional lighting holes/slots in it but this is a good starting point.

Terry will this be CNC or manual mill?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-30-2016 08:36 PM  3 years ago
TMoore

rrMaster

Cookeville, TN

MyPosts All Forum Topic
I'll run it on the CNC in my basement.Part 107.
The only ZERO flight hour certificate in the world.
It's like getting a driver's license without the driver's test.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 2257 views POST REPLY
Home✈️Aircraft🚁Helicoptere-Hirobo Embla - SRB Quark - Lepton › Hirobo Lepton EX part...
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Sunday, January 26 - 10:58 am - Copyright © 2000-2020 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online