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Hirobo Embla - SRB Quark - Lepton
› lepton stretch kit
11-27-2007 02:00 AM  10 years agoPost 1
uh-1b flyer

rrNovice

montreal,Quebec-Cana da

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I was very excited to get th stretch kit for my lepton however, that excitement ended rather quickly as I am already having problems and I haven't even flown with it yet. First off one of the carbon tail blades appears to be cracked on the trailing edge of the blade. Second the carbon tail boom doen not fit properly. The holes simply do not line up with those on the tail block. I am very dissapointed. I am obviously going to return the parts and I am sure that the tail blade is just a defect but has anybody else encountered this problem with the boom. If you have is it just one batch that had a problem or is it all of them? Also how did you fix the problem? I am considering filing down the end of the boom or turning the holes into small slots so that they can line up.

Thanks in advance for your replies.

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11-27-2007 02:56 AM  10 years agoPost 2
TonyTypeS

rrElite Veteran

New Orleans, LA & El Monte, CA

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You can always drill out the 4 holes on the boom a slight bit bigger to get it to align with the tail case. Look and see how much the holes are off with the tail case and drill that hole bigger.
I found a longer carbon boom and drilled the holes myself and found the same problem as you. Easy fix

Sorry to hear about your tail blades. I would returns those and get a new one. Must be a bad set.

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11-27-2007 04:58 AM  10 years agoPost 3
mbfjr

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Lawrenceville, Georgia

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My carbon boom didnt fit exactly either. All I had to do was take a file and file off a tiny bit of length off the back end of the boom. It took very little filing, less than half a mm, then the holes lined up perfect. My Hirobo 64mm tailblades were perfect though, if yours are split, send them back.

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11-27-2007 06:36 PM  10 years agoPost 4
mr2rbo

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Virginia

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I'm about to get the stretch kit myself. I'd like to know how it works out.

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11-28-2007 03:48 AM  10 years agoPost 5
uh-1b flyer

rrNovice

montreal,Quebec-Cana da

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Thanks again for you replies. I filed down the end of the boom and it fit perfectly. As for the tail blades I should be getting a new set.

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11-28-2007 04:50 AM  10 years agoPost 6
mr2rbo

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Virginia

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That's good news! Now it's my turn

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11-28-2007 03:35 PM  10 years agoPost 7
Tmblewd

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Phoenix, AZ

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what is the length of the carbon fiber boom please? Also, is it the same diameter as the stock aluminum tail boom? Thanks

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11-28-2007 04:02 PM  10 years agoPost 8
boltz

rrApprentice

Colwich Kansas U.S.A.

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How much do you think the 465mm rotor blades will upset the set-up and power options versus the original 425mm blades?

Will bigger batteries or stronger motors be required?

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11-28-2007 04:50 PM  10 years agoPost 9
Dr.Don

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Cedar Park, TX -- USA

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For $47 the boom ought to fit perfectly and be hand delivered by a courier.

Dr.Don

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11-29-2007 02:37 AM  10 years agoPost 10
uh-1b flyer

rrNovice

montreal,Quebec-Cana da

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The length of the new boom is 500mm instead of the original which is 455mm. As for the diameter it is the same.

In regards to the new 465mm blades I am not sure how they will affect the setup of the machine but in any case I did not get them yet as I am confident that they will not be necessary. I haven't had a chance to try the heli yet with my new configuration since it has been cold and either snowing or rainy here. However, if I find that I want a bigger main blade I will probably not use the Hirobo blades and go for something in the 440mm range.

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11-29-2007 02:02 PM  10 years agoPost 11
Tmblewd

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Phoenix, AZ

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When I was talking to Jeff Green about the stretch kit, he was thinking the longer blades were going to slow down the cyclic because of the longer/heavier blades. Which, should require more power. I personally am using the Hyperion Motor with a 22 tooth pinion for a head speed of 2700. If more power is needed, I can still go up in pinions.

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11-29-2007 02:30 PM  10 years agoPost 12
Dr.Don

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Cedar Park, TX -- USA

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For me, the whole point of the stretch kit is to increase tail authority. The longer boom adds to the tail moment by itself. If that isn't enough, it makes space for longer tail blades, which should really increase authority. Lengthening the main rotor blades adds torque and requires an even stronger, more authoritative tail. That is going the wrong direction for me.

Dr.Don

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11-29-2007 02:36 PM  10 years agoPost 13
Tmblewd

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Phoenix, AZ

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Well, so far I am happy with my Stock Lepton. I was looking into the stretch kit, but I really don't want a carbon fiber tail boom, especially when it's $47. I found some places on the web that sell aluminum tubing of the correct diameter, but their minimum order is $275.00. Kinda hard to justify $275 in tail booms to the wife.

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11-30-2007 02:36 AM  10 years agoPost 14
uh-1b flyer

rrNovice

montreal,Quebec-Cana da

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I agree with 2alto8 the bigger main blades will probably offset the lengthening of the boom and bring you back to where you started. If you want to slow down the cyclic I would suggest heavier paddles with a thicker airfoil.

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11-30-2007 04:31 AM  10 years agoPost 15
Tmblewd

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Phoenix, AZ

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Well, kinda hard to find heavier or thicker paddles for the Lepton. To slow down the cyclic, I put a set of TRex flybar wieghts on. It works goods for my slow fingers.

But, yes I will have to agree with 2atlo8 that lengthing the boom then the longer blades puts you back where you started, not what anybody really wants.

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11-30-2007 04:34 AM  10 years agoPost 16
Tmblewd

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Phoenix, AZ

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As for Paddles and Blades weights

TRex paddle 6.3 grams

Lepton Paddle 9 grams

Gorilla Paddle with wieght 7.5 grams
without weight 5.6 grams

Stock Lepton Blade 61.2 grams

MAH Blade 58.1 grams

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11-30-2007 05:26 AM  10 years agoPost 17
Jafa

rrElite Veteran

Sydney, Australia

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I just use dual rates to slow down the cyclics - I use this for my rolling circuits

I also have a set of carbon blades from Hong Kong that have an outter C/G - they roll slower than the standard Lepton blades and were good for me when I used to be rather intimidated with the Lepton - but I don't use these blades anymore


Protos | Logo 400 & 500 | Sceadu Evo | Freya Evo | Trex600N | Avant FX

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11-30-2007 06:29 PM  10 years agoPost 18
eheliflyer

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NorCal

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Can someone post pics of the stock and stretched versions?

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Hirobo Embla - SRB Quark - Lepton
› lepton stretch kit
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