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Other › Using Eksy CP2 parts
09-11-2005 02:38 AM  12 years agoPost 1
stealth916

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Rocklin, CA

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I got the Esky CP2 parts in from - only 3 days coast to coast with their std shipping!

I forgot to order the 'servo control' - ie - servo mounts, so I am not in the air yet. Here are my preliminary notes.


ESKY CP2 FRAME
Anyone ordering a Esky frame - should also order the servo mount kit, and at least one set of skids. This will get you what you need to convert your Blade to use the cheaper Esky CP2 frame.

One you get a set of Esky skids and have the screw mounts that come with them, the Esky frame can be used with Blade/Eflite skids if you like. I noticed that the Blade/Eflite skids are a little taller - maybe 1/2" than Esky - and they are shaped a little differently. I prefer the Blade skids.

You will also need new motor mount screws - perhaps 3mm longer than the Blade screws - because the Esky frame is thicker in that area.

Next, the Esky frame is a little taller in the bearing block area - so it gives the main shaft a little better support.

The servo mounts sit a little higher up, because of the main gear to frame spacing (see below). The servos are screw mounted to the frame, and should be more secure and easier to change to a new frame, than the Blade sticky tape method.

The skids on the Esky CP2 frame are screw mounted. I don't plan on using the screws - I just snapped the mounts onto the frame and it is solid but crash resilient. It is a lot easier to get the Esky skids off than with the Eflite/Blade. In fact - you can remove the complete/intact Skid/Battery tray assembly from the frame in a minute.

ESKY CP2 MAIN GEAR & SHAFT
The Esky CP2 main gear is thicker and has a metal hub. It definately runs truer. It also sits a little closer to the frame than the Eflite gear, and this makes the head assembly sit a little higher too - but this is handled by the servo mounts.

It also means the Eflite motor needs the pinion pressed on 2-3mm farther to use with an Esky gear. So while not required, you should press the pinion of the Eflite/Blade motor down about 2mm farther on the shaft - using a vise. When you start using the less expensive Esky motors - this will not be a problem.

The Esky main gear and main shaft are seperate parts. This is nice, because you can now drop in or remove your whole, assembled head/shaft assembly for maintenance! Every Esky replacement main shaft comes with shear pins.

ESKY CP2 MAIN BLADES
The Esky CP2 main blades are Symmetrical. They are the same length and chord as the flat bottom blades that come stock with the Blade CP.

The Esky blades are 10mm longer than Eflite sym blades. They are also 1 gram heavier.

However, the root reinforcements of the Esky blades are thicker than the Eflite/Blade flat bottom blades. The root reinforcements are not interchangeable from the flat bottom blades.

So you will probably want to get a set of Esky CP2 blade grips, if you want to use the cheaper Esky blades. It will save a lot of time in the long run. I decided to order the Esky blade grips...

I did not have a set of Eflite Sym blades to compare the Esky blades to, but here are the specs of the Esky blades.

- 235mm from bolt hole to tip
- 35mm chord
- The tips are swept similar to the Blade/Eflite sym blades - maybe a slighty different angle.

ESKY CP2 CANOPY
The Esky canopy is nice & light like the Eflite - but not as cool looking. It is a slightly different shape, but not much. It only uses two rubber grommets up high for mounting, and down low it attaches to the skids. This is less fiddly than with the Blade canopy, but maybe not as sleek looking. A little work with some scissors will have it looking a little more stylish.

You could CA a carbon rod to the frame for the low mounts, and easily use a Blade canopy with 4 grommets if you wanted to.

The Esky canopy is white - with some plastic decals applied. You can heat them with a hair dryer and easily remove them, to have a plain white canopy (canvas). Then you could paint it or cut your own decals from sheet.


ESKY HEAD PARTS
The Esky swash is the exact same as Eflite.

A Bell-Hiller mixing system is used on the Esky CP2, compared to the Hiller only system of the Blade. You can continue to use your Blade CP head assembly, or you can get the Esky head & mixing arms to go Bell-Hiller.


SUMMARY
So it appears that all Esky parts will work no problem. Just be sure and get at least one servo mount kit, and one set of skids with your Esky frame. You should not have to buy the servo mounts or skid mounts again even if you trash the frame.

Here is the ESKY CP2 exploded drawing for parts hunters:


CLICK FOR LARGER

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09-11-2005 03:13 AM  12 years agoPost 2
Sam Mc D

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Lexington,KY--U.S.

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won't these parts work with the blade frame?
I was thinking of using just the blades,main shaft and rod, and the skids.
This seems to be what I break most trying to learn to fly this thing.

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09-11-2005 03:19 AM  12 years agoPost 3
stealth916

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Rocklin, CA

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The Esky skids will work fine on the stock Eflite frame, but keep in mind they are a little shorter. The blades should work with a 9T pinion (aero enhancement kit) motor, but probably not good with the stock Blade motor. But the blade root reinforcements will need to be filed down to get them to fit properly into the grips. I had to do the same thing with the real Eflite Sym blades - so maybe better to get one set of grips and get it over with - then you can use the $6 Esky blades with no hassle.

The main shaft & gear assembly should work no problem.

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09-11-2005 03:28 AM  12 years agoPost 4
Sam Mc D

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Lexington,KY--U.S.

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I have the acro kit already, just still using the flat blades I have left.
So the blade grips go right on ,while still maintaining the sticky collective fix...?

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09-11-2005 03:50 AM  12 years agoPost 5
stealth916

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Rocklin, CA

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I would imagine no problem using the grips - but I cannot confirm it until I get them here (with the servo mounts). The stacking order of the parts is the exact same - as you can see by the parts drawing.

I will know for sure mid-week.

To be honest - in my personal experience, the sticky collective was resolved more evidently after I enlarged the see-saw slot in the hub for the flybar. This made all the difference in the world in my case.

It was also mentioned that the Esky blades may be larger in chord and/or length than the Eflite sym blades - but I cannot confirm until somone meaures an Eflite blade for me.

To me - they look the exact same size. Perhaps Esky used to make some larger blades than these.

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09-11-2005 04:31 AM  12 years agoPost 6
Sam Mc D

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Lexington,KY--U.S.

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I have a set of e-flight sym blades but don't have calipers to measure them. Right now I am working on my ducted tail fan and will look more into this later.
If there is another way to do it let me know where and how and I will do it.

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09-11-2005 04:52 AM  12 years agoPost 7
stealth916

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Rocklin, CA

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You'd need a big set of calipers to do 235 mm :-) I just used a lead lined (flexible) ruler with mm markings. You could probably just use a normal ruler with mm markings. We just need approximate numbers, and not worried about the thickness. THANKS !!!

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09-11-2005 08:04 AM  12 years agoPost 8
Sam Mc D

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Lexington,KY--U.S.

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The E-flight blade is about 22.5mm from bolt to tip. maybe just a bit over that... like 2 lines. but is pretty close. I can't see 1mm making that much differance.

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09-11-2005 12:37 PM  12 years agoPost 9
helaboy

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Winston-Salem, NC

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Thanks for all of your work in posting this great info stealth916. I am really looking forward to your future posts concerning this conversion. Are you planning on converting the head assembly also?
Thx

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09-11-2005 02:34 PM  12 years agoPost 10
stealth916

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Rocklin, CA

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Sam Mc D - THANKS! I think (hope) you mean 22.5cm - or 225mm - or perhaps a little more if you are using a cm scale and say it is a few lines more? What about the chord (the distance from leading edge to trailing edge)?

Helaboy - I did not order the Bell/Hiller parts yet, as I am thinking of putting the money into the Esky King instead. Plus I have a few spare Hiller only head parts laying around already. Perhaps if I trash them all out I would replace them with the new parts.

If anyone else could double check the Eflite sym blade length and chord with a mm scale, we can determine if some blade chopping is in order. Thanks!

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09-11-2005 06:27 PM  12 years agoPost 11
stealth916

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Rocklin, CA

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Here is a bank template for the Esky canopy., so you can try sketching out some designs on paper...

This image prints to scale - do not enlarge or reduce.

CLICK HERE FOR TWO PER PAGE L/R SIDES
CLICK HERE FOR TWO PER PAGE


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09-11-2005 09:32 PM  12 years agoPost 12
Sam Mc D

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Lexington,KY--U.S.

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Ok No lines more measured again while sober....LOL
22.5 Milimeter tip to bolt hole
3.5MM from leading edge to trailing

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09-11-2005 10:41 PM  12 years agoPost 13
dcochra1

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Palm Harbor, FL

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Using Eksy CP2 parts
My question for stealth916 what parts do you need for the bell-hiller conversion for the blade cp?

These are what I came up with at http://www.balsapr.com/
just wanted to be sure before I placed the order.

Center hub set (EK1-0228)
Rotor head set (EK1-0229)
Paddle control frame (outer) (EK1-0231)
Flybar (EK1-0232)
Paddle (EK1-0233A)
Pitch control link (EK1-0234)

Thanks!!

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09-12-2005 05:29 AM  12 years agoPost 14
stealth916

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Rocklin, CA

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The flybar and paddle are probably the same as the Blade, so you probably don't need to order those. Everything on your list looks good, but I wonder if the paddle control links are the same length?

I add that up to only $19.07 worth of parts from . I just added it to my order shipping tomorrow, so we'll see. I can splurge for $19 to find out.


SamMcD - thanks again! We'll call it 225mm x 35mm. So that makes the Esky blades 10mm longer than Eflite sym blades, and the same length as Eflite flat bottom blades. They appear to have the same chord.

That makes the Esky blades 12.73 sq. in, and the Eflite sym blades are 12.19 sq. in. That is only about 4.5% larger area, and also only 4.5% longer span.

I also weighed the Esky blade, and it is 10.0 grams. That is 1.0 grams heavier than Eflite - or 11% heavier.

Will this burn out the motor prematurely? Time will tell. I won't sweat the $5 price tag for the Esky motor

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09-12-2005 05:45 AM  12 years agoPost 15
stealth916

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Rocklin, CA

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Here are the Esky CP2 parts to convert a Blade CP to Bell Hiller. I am not sure yet if the paddle control links/hoops are the same length.


Center hub set (EK1-0228)
Rotor head set (EK1-0229)
Paddle control frame (outer) (EK1-0231)
Pitch control link (EK1-0234)


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09-12-2005 03:16 PM  12 years agoPost 16
bluesky123

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Boulder, Colorado, US

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Blade comparison
I've just received E-Sky blades (they are symmetrical) and compared to the flat bottom E-flite blades--they are identical except for E-Sky blade tips (E-Sky have triangular "corners" removed, which looks cool). Otherwise, the length and the width are exactly equal.
I've got no E-flite symmetrical blades to compare with E-Sky...

Boris

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09-16-2005 07:05 AM  12 years agoPost 17
stealth916

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Rocklin, CA

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Anyone ordering the Bell Hiller Esky CP2 parts - also needs to order a set of the 3 x 2.5mm bearings, EK1-0213

$3.31 - brings the total conversion to about $22 and change.

Anyone ordering an Esky CP2 frame may also want to order a screw kit or two, unless you have a good collection of small screws already like I did.

You need them to screw the servo mounts to the frame, and then the servos to the mounts.

I got my heli in the air tonight with the new Esky parts for about 3 mins of hovering in the dark. I am still using the Hiller only head from the Blade. I did have to move the z-bends on the links to a different (higher) servo hole, but that was it. I am still using the stock Tx.

Everything seems in trim and ready to rock. The DD tail mod didn't even need a REVO change.

The Esky blades needed only a little filing to fit into the Esky grips properly; much less than it would have taken to get them into the Blade grips. The Esky grips go together the exact same way as the Blade grips, and all of the guts from the grips are interchangeable.

More after the sun comes up...

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09-16-2005 01:09 PM  12 years agoPost 18
lsnover

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Lehigh Valley, PA

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The E-Flite Symetrical blads also have the rounded (corner removed tip).

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09-16-2005 02:19 PM  12 years agoPost 19
Hoverup

rrElite Veteran

Golden Gulf Coast - USA

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You'll love it with the full Bell-Hiller head. It's a totally different helicopter with this upgrade.

Cheers - Boyd
AMA 80393
IRCHA 3355
LSF 853
Major USAF
Retired

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09-16-2005 03:37 PM  12 years agoPost 20
stealth916

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Rocklin, CA

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It is windy as heck this morning! At least was able to track my blades and did get in some circuits, and all I can say for now is it flies again.

Contradicting what I said earlier, I can now tell that I will need to reduce REVO a little with the DD motor on the 4.5 x 3 prop.


OTHER OBSERVATIONS
- The Esky paddle control links are the same as the Blade, which means they're good for replacements - or conversely it means your Blade links will work in a Bell/Hiller conversion.

- The Esky Paddle control frame is shaped differently for Bell/Hiller use - but it WILL work as a straight replacement for a Hiller only paddle frame for a Blade CP. I would replace my Blade paddle control frame with this if I ever broke one - you'd be one part closer to Bell/Hiller.

-The Esky replacement motor comes with the screws you need mount it, and the pinion is lower on the shaft as earlier discussed.

- I really like the Esky main frame/chassis - it does seem more rigid.

- I really like the 2-piece main gear/shaft! It makes working on this heli much easier. You can now pull out your entire head assembly even with the main blades in place if you want, and drop in a another complete assembly in less than 60 seconds.

- The Esky canopy is a little more fiddly to get on - it seems the main motor is ever so slightly in the way. I may drill a cooling hole in the canopy for added clearance.


ESKY CONVERSION - CONCLUDING
So concluding - it was definately no problem to convert to the Esky frame, main shaft, and main gear. If you have a good collection of small screws you're in business, otherwise get some with the frame and servo mounts.

Another considerable option is just getting the WHOLE Esky CP2 heli with motors & blades, for $75 from - and you will have EVERYTHING you need and probably more!

I have not even touched my Tx trims, and I am using the stock Tx with the stock pitch curve, so the servo position in relation to the swash must be pretty close to original - it's too windy to let the cyclic stick go yet.

I only had to move two of my servo links to another hole, and everything seems glorious.

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