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MaxAmps.com . HeliDirect . PowerHelis

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e-Electric Conversions > Conversion of Hirobo Heli's
 
 
Jaxx0n
Heliman
Location: Minnesota

Hey all,

I have been trying to determine if I should proceed with this, but was looking for insight as to run times, what batt to use, etc. I have a couple of old Hirobo heli's that I bought for parts, and need some links or something as far as how to get started on my conversions. I really do not want to run gas/nitro since they are such a pain to deal with, not to mention the noise. What motor and gearing would you use? Do any online companies make such a "kit" to convert Hirobo heli's from gas to electric?


Thanks in advance
10-02-2004 Over year old.
 
 
Bell Bloke
Veteran
Location: England

Hi There, thought I must reply to your post. Now I don't know what helis you have but if they are about 1.8m rotor span I would look at a Joker type set up, that after all it is quite a big heli. A large 60 size in the case of the Maxi Joker,
& I would use that as your starting point. When I converted My Century Bell 47 heli I used a 50 sized electric motor (Hacker C50 16XL) the motor is rated at 1050rpm per volt so at 22.2 volts my motor is at 23310rpm, roughly DOUBLE the rpm of the IC unit, so then all I had to do was find a pinion gear with HALF the number of teeth, EASY! So I would recon if your Hirobo heli is Joker sized find out the rpm of that Joker set up and calculate your gearing accordingly. If your Hirobo is a 30-50 sized heli just copy what I've done, mine works beautifully, and with 30 minute flight times. Oh, just two more things, Li-pos are a must have, I used 3s4ps x2 of them, and I went over the top with a 75 amp speed controller, just to be safe. The Joker controller is 100amps I think, and for the Li-pos, it may be worth you Emailing julian@flightpower.co.uk, on that one, a very nice helpful chap!
Hope this helps you out a bit!

All The Best!
12-05-2004 Over year old.
 
 
Hoverup
Elite Veteran
Location: Gulf Coast

I too am looking to do a Hirobo conversion. Santa is bringing me an early Christmas present in the form of a .30 sized Lama. I understand that these have Shuttle mechanics, but have been unable to find anyone that has converted this beast to e-power. Spoke with Jeff Green (first class chap BTW) at Altech Marketing today and he told me they were working on a Scedeau E-conversion, but that it wouldn't help me in my project. So I guess we can break trail with a little help from the pioneers that have done the Century and Raptor conversions.

Cheers - Boyd
AMA80393
Major USAF
Retired
12-07-2004 Over year old.
 
 
Bell Bloke
Veteran
Location: England

Hi Boyd-Hoverup, funny you should say that but Santa is getting me the same present too, I am going to do the same set up with the Hirobo as with my Bell 47, I've realy got this electric conversion bug bad! I know the Hirobo is a bit smaller, so it may have a little bit more power than is required but, better too much than too little! Will hopefully have it finished for the end of January. I am sure this setup will work with this heli because it is so similar to the Bell 47 in size and weight.
Here is my finished electric Century Bell, I have posted these pics before, but that was a few weeks ago and thay may be hard to find now. I have now logged 19 hours flying time with this heli, and its so far so good, or should I say, so far so Great!
All The Best!

12-07-2004 Over year old.
 
 
Hoverup
Elite Veteran
Location: Gulf Coast

Your Bell 47 inspired me. Hopefully we can get there with a little collaboration. Let's keep this thread alive or start an E-Lama thread devoted to our conversions. Your call.

Cheers - Boyd
AMA80393
Major USAF
Retired
12-07-2004 Over year old.
 
 
Bell Bloke
Veteran
Location: England

Hi Boyd-Hoverup, sounds like a great idea. What I will do is photograph the build-up of the Lama, and when I have made some real progress on the conversion, I'll post all of the results with photos, gear ratios etc on this section under, Electric Hirobo Lama.30. I should have some results by mid January.
Until then, All The Best!
12-07-2004 Over year old.
 
 
Bell Bloke
Veteran
Location: England

Actually, there was one more thing, I was thinking of importing the Lama from the USA could you recommend a good Hirobo dealer in your area who exports to England mail order. Many Thanks.
12-07-2004 Over year old.
 
 
Paul_Barsamian
Senior Heliman
Location: Glenview (North Suburban Chicago)

Hate to toot my own horn here but check out this thread,
http://runryder.com/helicopter/t140633p1/
and the one entitled E-Evo conversion just a few screens down on this thread.

I will have the Proton frame kit ready in about 3 weeks for production. I have been testing it and the prototype flies really well, 8.5 lbs all up weight with batteries and the power is outstanding.

I recommend no matter what you do that you do a 2 stage gearbox and a hacker C50 15XL setup with 10series batteries. This seems to be the best power setup for a 50, there is also several threads on the Efficient Raptor 50 conversion that uses similar power systems and has more info.

Let me know if you decide to do it or have specific questions.

Son, before you can soar with the eagles you have to learn to sh** with the chickens
12-07-2004 Over year old.
HOMEPAGE  
 
 
Hoverup
Elite Veteran
Location: Gulf Coast

That's great news! I have no ownership experience with IC Hirobo choppers, but the .30 sized Lama has Shuttle mechanics (or so I'm told - my Lama is due in tomorrow). So the first question I have is............are there enough common points between the EVO and the Shuttle so that your E-Evo conversion will make my task less painful and less expensive? I have a Hacker C50 20XL new in the box bought for another conversion. I'm looking to do scale circuits with the Lama and don't need 3D capability, just enough power to get me out of trouble if needed. Thanks for chiming in and I will take you up on ypour offer of help.

Cheers - Boyd
AMA80393
Major USAF
Retired
12-08-2004 Over year old.
 
 
Paul_Barsamian
Senior Heliman
Location: Glenview (North Suburban Chicago)

Boyd,
I also have a simpler conversion kit for those not worried about weight and 3D flying, it is make to be a bolt on to the Evo, was selling for 50 bucks without the gear set from tppacks.com. I don't know what the Lama mechanics look like exactly but I am more than willing to help you out. I will need to get a good pic of the Lama mechanics and see of the baseplates I made for the first conversion kit will fit.

The 20XL might be too high of a wind, but I think we can still swing it, need to punch some numbers to tell. What kind of ESC do you have?

Also have you bought batteries yet? Probably recommend Lipoly but I have no idea yet what config.

If the ready made stuff doesn't fit, I am willing to help do some leg work to make a set of mounts. I have ready access to machining for CF parts and delrin so I am sure we can come up with something.

Son, before you can soar with the eagles you have to learn to sh** with the chickens
12-08-2004 Over year old.
HOMEPAGE  
 
 
Hoverup
Elite Veteran
Location: Gulf Coast

Man this is super! Thanks for your help! No ESC or Lipolys for this project as yet, so I am open to suggestions. I should have the Lama kit tomorrow and will post some picks ASAP after I receive it. Thanks again.

Cheers - Boyd
AMA80393
Major USAF
Retired
12-08-2004 Over year old.
 
 
ozheli
Senior Heliman
Location: Sydney, Australia

I have completed a Shuttle conversion to electric. I bought an engine mount from hhiheli.com that will bolt straight into a shuttle. This replaced the .30 engine but still retains the clutch setup aswell. There is nomodifications to the frame at all so you can go to an IC motor anytime in the future. I'm not completely sure if the frame for the Lama is the same as the shuttle.

I used a Hacker C50-20XL motor and 8S4P 8000mAh Thunder Power LiPo batteries. It will have more than enough power for what you want and will sound awsome in the air.

If you need any more info just PM me.

Cheers.
12-08-2004 Over year old.
 
 
Hoverup
Elite Veteran
Location: Gulf Coast

Thanks very, very much!! Isn't this www stuff absolutely awesome!! Thanks for sharing. Time to get out the credit card

Cheers - Boyd
AMA80393
Major USAF
Retired
12-08-2004 Over year old.
 
 
Hoverup
Elite Veteran
Location: Gulf Coast

ozheli - What ESC are you using?

Cheers - Boyd
AMA80393
Major USAF
Retired
12-08-2004 Over year old.
 
 
Paul_Barsamian
Senior Heliman
Location: Glenview (North Suburban Chicago)

Boyd I am embarrassed that I forgot about the HHI Heli kit, nice call OZ.

Was a purty blue piece if I remember right?

OZheli, do you have an AUW you could share? I think for the scale conversion it will likely be fine, I am just curious as to the kind of load Boyd might have to carry with a scale setup and all those batts.

That lama will surely be more realistic with a turbine sounding electric and no crazy smoke trail.

Son, before you can soar with the eagles you have to learn to sh** with the chickens
12-08-2004 Over year old.
HOMEPAGE  
 
 
Hoverup
Elite Veteran
Location: Gulf Coast

No problem b0gh0s Yes it's a nice blue anodized piece that will be buried in the frame and hidden by the Lama body panels. This is turning into a much easier task with the help you guys are providing. My E-Shuttle conversion kit is on the way from PA by USPS Priority mail as I type. And you are right about the absence of a smoke/grease trail and the sound of the BL motor sounding like a gas turbine. I guess the only thing better would be the 1/5th scale Lama with a gas turbine for power, but I don't have $15,000.00 to invest and I'd have to add the lawyer fees and alimony costs to that when my bride found out.

Cheers - Boyd
AMA80393
Major USAF
Retired
12-08-2004 Over year old.
 
 
ScotY
Senior Heliman
Location: Honolulu, HI

Oh, goodness...please don't use the HHI conversion kit. It looks purty and is certainly inexpensive enough but it's just silly. Also, the 20XL isn't a very good choice for motors...too much resistance = too much heat.
12-09-2004 Over year old.
 
 
steph280
Key Veteran
Location: Irvine, California

Like Scot said, 20XL is not a good candidate. You should get a 15 or 16XL and gear around it. They are much more efficient.

Or go for one of those Actro outrunners.
12-09-2004 Over year old.
 
 
ozheli
Senior Heliman
Location: Sydney, Australia

ScotY, I have to disaggre..The 20XL was perfect for the conversion....It is the right KV for the job since you are limited to the gearing you can use with the HHI mount.

The all up weight of my shuttle was around the 3.9kg mark. It was a bit heavy but felt great in the air. It had plenty of power and would fly for about 20 mins.

The turbine sound of that brushless motor is going to sound awsome for the lama.
12-09-2004 Over year old.
 
 
ozheli
Senior Heliman
Location: Sydney, Australia

Boyd,

I used the hacker 48-3P heli speed controller. It will be all you need for this conversion and is a very reliable unit. I put it through hell and it never let me down.
12-09-2004 Over year old.
 
 
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