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01-10-2011 05:19 PM  7 years agoPost 1
GM1

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Tallahassee, Florida US

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What brands of TR blades will fit in the narrow Lepton grips. I need some about 70-75mm long. Also does anyone know where I can acquire a speed up tail gear for the Lepton?
I read all the old threads but was hoping for current information.
Gordie

On a dog sled team, if you're not the lead dog, the view never changes.

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01-10-2011 05:33 PM  7 years agoPost 2
kcgraves

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rochester, ny - USA

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I use the KBDD 70mm blades with a 4mm root. They also fit the Protos and Atom. Readyheli has them. Just make sure they say 4mm root as they also have a 70mm with a 5mm root.

I have the HDX 13T aluminum tail pulley on mine. It is a bit wide but if you have any experience, or know someone who does, with alum. you can have them shave it down to the same thickness as the stock plastic one. Other than that the only other way I know is to get the HDX tail case, but it is not the same quality as the Lepton case. HDX is available at Helidirect. Look for the HDX 500, they have a 13T and 14T. The plastic Lepton one is 14T.

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01-10-2011 05:47 PM  7 years agoPost 3
Dr.Don

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Cedar Park, TX -- USA

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Gordie,
I saw your post on allmyrc. Longer blades alone are not going to save this thing. If someone makes a 13T pulley as noted above, try that with the longer blades. There is probably enough takeup in the boom adjustment that you can use the existing belt. The tail ratio on this machine has been a problem for almost everyone who has tried one.

Dr.Don

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01-10-2011 07:52 PM  7 years agoPost 4
kcgraves

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rochester, ny - USA

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Plenty of belt. The pulley is the same diameter just one less tooth. I don't have much trouble with the tail unless I get close to or go over 2800 RPM, it likes between 2600 and 2700 RPM. I sport fly but have let a 3D pilot fly it. He didn't have any tail issues with it with the 70mm KBDD and the 13T pulley.

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01-11-2011 03:42 PM  7 years agoPost 5
GM1

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Tallahassee, Florida US

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Whew

OK, got 13T pulley and 70mm TR blades ordered so we shall see how this works out. I really enjoyed building this model and think the quality was outstanding. I do not understand the choice of main and TR gear ratios but I guess this was a while back and the knowledge base wasn't what we have now. Thanks for the advice.
Gordie

On a dog sled team, if you're not the lead dog, the view never changes.

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01-11-2011 04:13 PM  7 years agoPost 6
Dr.Don

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Cedar Park, TX -- USA

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Gordie,

You're right; I think it was about the first machine out that ran 425 size blades. I know it was months ahead of the Trex 500 because I bought one while waiting for the Trex. It's original concept was to use 3S or 4S when lipos were much more expensive than now. I think most people went 4S. The tail ratio is unexplainable and Hirobo's approach to solving it by extending the tail boom seems obtuse and inadequate. I sold mine after many months of inadequate tail performance. At that time no one offered an aftermarket tail pulley, so maybe you will have a better time with it.

The real mystery to me regarding this machine is why Hirobo never came out with a mod kit that would re-gear it for 6S and a tail ratio of about 4.5-4.7.

Dr.Don

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01-11-2011 04:40 PM  7 years agoPost 7
Tag1260

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Ohio USA

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I could be proven wrong but I think Hirobo has abandoned this heli all together. It will surprise me if there is ever another version of it.

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01-11-2011 04:59 PM  7 years agoPost 8
kcgraves

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rochester, ny - USA

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From what I understand and have read on different forums it is still popular in Europe and it is still prominently listed on the Hirobo Japan web site. As 2atlo8 said it was one of the first, if not the first, 500 size electrics when it came out in 2006. It never caught on big in the US because the kit was over $600, batteries were $$$, and the Hirobo motor and ESC were over $400. So with a couple three batteries you are close to $2K. And the selection of 3rd party batteries, motors, and ESC were not what they are today. It was ahead of its time for a 500.

There was a company in Europe that made an upgraded main/tail gear set but as far as I can find they haven't made it in over two years.

But I agree, I don't think Hirobo will do an upgrade to the Lepton and unfortunately there are not enough of them around in the US to warrant any 3rd party vendors making upgrades.

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01-15-2011 05:51 AM  7 years agoPost 9
TMoore

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Cookeville, TN

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I don't know which tail pulley that Gordie has coming but the one that I did needed a little modification. I had to take it apart, machine it, move the slot for the drive pin and reassemble.

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01-15-2011 10:53 AM  7 years agoPost 10
kcgraves

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rochester, ny - USA

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I have the one for the HDX 500:
http://www.helidirect.com/metal-cnc...ssah-p-5872.hdx

It is about 1mm or so too wide as the HDX tail case has the bearings mounted a little differently. The slot and the pin were OK so I had someone mill down the side opposite the pin until it was the same thickness as the Hirobo 14T pulley.

It looks just like yours TMoore.

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01-15-2011 12:47 PM  7 years agoPost 11
Mike0251

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Hills of the Blue Ridge VA

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Some points worth noting for you. The kb plastic blades need careful attention in balancing vs the carbon 65mm that I currently use. 70mm are also very long for the Lepton and ground clearance is minimum. I use this all metal tail unit and it too has 13t and works great:
http://www.helihobby.com/html/heli_lepton_upgrades.html
I tried the kb blades, would not spin smooth and went back to 65 carbons. PM me your address and I will send you two new sets for free in neon green and orange. The 13t by itself will do the trick just mod it like Moore said or use the above case.
Next up, HDX parts are crap when compared to Hirobo parts in quality and material. Lets take the main shaft, its steel and weighs a ton, the hirobo part is aluminum. Will include that to you too for free. The feathering shaft is a tad to long and looks like someone forgot to finish machine that as well, another part for your care package. Keep the drive belt to the tight side not the loose side otherwise she could jump, I know. Hirobo stock blades fly great too. Rons was giving them away a few weeks ago in their clearance for $30 but that has ended. Extended tail tube. Its nice, adds some control and nice looks to the bird. About 1.5 inches, need extended belt. Tube from Hirobo is expensive, about $38(?). However, I found a carbon tube supplier in Germany that makes 15mmOD x 14mmID carbon tube and they come in 1000mm lengths. They will cut in half at 500mm which is exactly the length of the extended boom. You can get 4 for 1.5 the cost of the OEM part. Need to drill 4 little holes. I sent Ben the data/mods for you showing how to squeeze in a 35c 5s pack as well. Replacement parts are expensive, jump a kit if you find one for sale cheap or even an airframe if you plan to keep this. If you need anything else just yell.

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01-15-2011 03:42 PM  7 years agoPost 12
Tag1260

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Ohio USA

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Lots of good info in your post. Thanks. I have a "new to me" Lepton on it's way and can use all the info I can get.
Thanks again

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01-15-2011 03:43 PM  7 years agoPost 13
kcgraves

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rochester, ny - USA

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Agree completely on the HDX parts. The tail pulley and flybar shaft are the only two parts I would consider putting on my Lepton. The quality is definitely inferior to Hirobo's.

I put GAUI 500 skids on my Lepton. Gives much better ground clearance when using 70mm tail blades. Just have to drill a couple of new holes in the skids. Also the MJP vertical tail fin helps, which unfortunately, is no longer available.

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01-24-2011 03:37 PM  6 years agoPost 14
GM1

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Tallahassee, Florida US

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Well

The Lepton is flying with the KBDD 70mm TR blades even though I have not updated to the 13t pulley. I have an issue with the tail wagging like it has too much gyro gain but it is too slow to be just that. I have been using a Fut 9650 servo but I may have to go to a high speed servo to see if that helps. The 13t pulley is in the future as it flies now and I am working on my EX-2 for contest season.

On a dog sled team, if you're not the lead dog, the view never changes.

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01-24-2011 03:50 PM  6 years agoPost 15
kcgraves

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rochester, ny - USA

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The Lepton is flying with the KBDD 70mm TR blades even though I have not updated to the 13t pulley. I have an issue with the tail wagging like it has too much gyro gain but it is too slow to be just that. I have been using a Fut 9650 servo but I may have to go to a high speed servo to see if that helps.
Where is the ball on the tail servo horn? I had to move mine into the closest hole. Have also read that people even drilled another hole at 5mm and that helped. I am using a Futaba S9257 on mine and occasionally it will do a wag or two but it is not consistent so I have been living with it.

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01-24-2011 03:59 PM  6 years agoPost 16
Mike0251

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Hills of the Blue Ridge VA

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I have recently switched my servo out to a 9254 full size. First hover went well and then the Escape decided it did not want to play anymore so that is back to the mfg for warranty. Then the new ice age descended upon us and that took care of any flying for awhile. I will report back on the 9254 when possible.
The Gaui skids are great!

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02-03-2011 01:15 PM  6 years agoPost 17
GM1

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Tallahassee, Florida US

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RATS!

Bls 257 did not solve the problem. Tail wag is still there but I did find out it is not gain related as I could run the gain up and down 30% and not change anything.
Will try BLS 251, then GY 401. Also will eliminate any mechanical issues (for sure)and tighten the belt a little. Sometimes it sux to be me.

On a dog sled team, if you're not the lead dog, the view never changes.

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02-03-2011 02:49 PM  6 years agoPost 18
TMoore

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Cookeville, TN

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401's don't play well in the Lepton.

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02-03-2011 04:01 PM  6 years agoPost 19
Flying Brian

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St. Clairsville, Ohio

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If you guys keep this up(showing pictures), Im going to have to get another Lepton...

I also contacted HeliProz to check and see if they can still get the model. I havent heard back from them just yet.

"I just don't Listen" "

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02-03-2011 04:19 PM  6 years agoPost 20
kcgraves

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rochester, ny - USA

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I use to have a GY520 on mine but could never get it dialed in with either an S9257 or a BLS257. Pulled it off at IRCHA and put a 401 on it. Had a Hirobo sponsored pilot fly it, all he did was kick the gain up to 45% (AVCS) and flew it around, much more aggressively than I fly. He said it was fine. KBDD tail blades and Edge mains with a 13T tail gear.

But I have read other posts that say a 401 is not a good match for the Lepton.

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