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Jan 28, 2009, 04:42 PM
Team Wack-a-Mole
Melnic's Avatar
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EXI 500 Thread

There are 2 versions of the Kit:

EXI 500 Carbon fiber frame version at Xheli (new RED Canopy version)
EXI 500 metal frame version at Xheli (new RED Canopy version)

Xheli Coupon Codes here
More Review info HERE
EXI 500 Budget Build info here
Note: The plastic version actually has lots of metal in it!

What does the Metal version have that the Plastic does not?:
CF frames instead of Aluminum
Metal Tail box instead of plastic.
CF and metal tail servo holder instead of simple plastic
Metal tail blade grips instead of plastic
Metal front boom holder instead of plastic.
CF fins instead of plastic.
Lightweight paddles instead of solid plastic
Metal washout arms instead of plastic
CF boom braces instead of aluminum.

As I see them posted, I will add potential Motors, ESC's, Blades and Servos people have used.

Potential Motors: 500 size, 5mm shaft diameter
NOTE: Remove ANY label on the motor or it will come loose in operation
NOTICE: I advise NOT to get the Typhoon 500H at this time if you want to run 6S because no one can seem to find 11T pinions!!!
There are people running the Turnigy Typhoon 500H with 5S packs with success.
Turnigy Typhoon : 1800kV (Lots of power, really measures to an 1850-1900Kv motor so use 11T for 2700-3000RPM. Do not use 10T or it will strip maingears)
3mm mounting screws 6mm in length or 8mm with washers (make sure screws don't hit internal wires)
Turnigy 500 Typhoon at Hobby City
Hobby King 500H
Xheli 500 Optima/Helium 1500KvUse 13T with 100% throttle curve for sport flying or 14T pinion.
Xheli 500 motor 1620Kv, About same power as Align500L, good bearing quality.

Align 500L : 1600kV (Well known in the Trex 500, use 13T pinion)
500L motor at Amain
HobbyMate HB3650 : 1700kV (Performs well, use 12T pinion)
3mm mounting screws 6-10mm in length
Hobbymate HB3650 from Dealextreme

HB3650 from HobbyZoom
HB3650 from rcmodelpart

(Kit comes with a 5mm shaft 0.6 Modulus (M0.6) 13T hardened steel pinion).
This pinion was not suitable for the Turnigy Typhoon 500H. An 11T is recommended.
TR 500 12T - 24T Pinions at Heli Direct
TR 500 12T - 17T Pinions at Ready Heli
Revco HARD ONE 10T-26T Pinions at Ready Heli

Potential Cyclic Servos:
Servos opening in the frame and tail are 36mm x 17mm
Hitec HS5245MG Mini digital (Metal Gear, digital, good power and decent centering.)
Hitec HS225MG Mini Analog (Metal Gear, good overall bang for buck)
Hitec HS225BB Mini Analog (Nylon Gear, BB, inexpensive power for the $)
Hitec HS82MG (Sport flying, inexpensive known reliability)
Align DS510 (Mini digital)
Futaba 9650 mini Digital (Nylon gear but Metal gear upgrade available)
Tower Pro MG930 Digital Metal Gear (Hobby City Inexpensive, unknown performance)
Fitec 9250 Nylon gear (awaiting feedback)

Potential Tail servos:
Futaba 9257 (not for 6V)
Align DS520 (Mini Digital)
Tower Pro MG930 Digital Metal Gear (not a fast servo for the tail but cheap)
Fitec 9257 Fast Analog (T3Beatz uses these)

Potential ESC (best to use external BEC and disable any internal BEC)
I recommend an ESC with super soft start ONLY or you may prematurely burn up a one way bearing or sleeve.
Volcano 60A w/o BEC from Xheli (60A if running 6S)
Hobbywing 80A w/o BEC from Xheli (80A if running 5S)
Align 60A ESC (if running 6s)

Use an external 5A BEC

Batteries (6S) (Hobbymate on 6S 12T/13T), (Typhoon on 11T/12T)
BlueLipo 6S 3000mAh 20C, 25C, or 30C
Hobby City Turnigy 2650 or 3000 6S batteries
Hobbypartz Gens Ace (better than Blue Lipo and high charge rate)
Batteries (5S) (Typhoon on 13T)

Xheli 430mm 3D Pro blades
430mm Blades at Heli Direct

Build notes:
Download the Trex 500 manual for some helpful information.
Use the Trex linkage lenths for the head to start with.
Initially I recommend mechanically setting up for +/- 12 collective and +/-8 cyclic pitch but use your swash AFR or swash mixing to get +/- 10 and +/- to start with.

Re-apply Blue loctite to ALL metal to metal screws. you can wait till you have it all build up but do it BEFORE you maiden your helicopter. I found the blade grips and tail grips were loctited so you may need to heat them to remove and inspect. If it's hard to remove, don't force it, heat it or you can snap the smaller 2mm screws. Tail box and head are 2 placed you don't want to forget to make sure has loctite. Fast spinning and high vibration will turn those screws out faster than you think.

Some people have reported tail blade grip screws (2mm x 6mm long) have snapped either on dissassembly, in a crash or in flight. Recommend you replace that with 2mm (6mm long) threaded socket head cap screws. (RTLFASTINERS.COM or MICROFASTINERS.COM).

Some people have reported the right tail shaft bearing has failed either initially or after a few flights. This bearing can also fail in a crash or if you have a tail imbalance so it's a good part to have a spare and are cheap. EXI 500 part # EXI-500-BR040904 or Align Part #MRZ6844ZZ

It is a good idea to have some spare 2mm and 2.5mm bolts and nylon locknuts on hand for ANY helicopter build. If you don't find you need them during the build it helps to have them later. There will be some spare screws in the kit but not the longer ones. A spare screw package from the EXI 450 spare parts list may be helpful if you add that to your order. Some sizes I recommend are:
2mm x 6mm
2.5mm x 6mm
2mm x 16mm (You may need this for servos like the deeper Hitecs)
2mm nuts & locnuts
2.5mm nuts & locnuts

Folks, to help serve others, once you get yours flying, please post your:
Blades, Motor, Pinion, Battery, ESC, BEC, BEC battery (if seperate from flight pack), Cyclic servo, Tail servo, gyro and any mods you needed to do.

Scroll down to the bottom of this website for Xheli and Hobby Partz coupons
Last edited by Melnic; Nov 24, 2012 at 10:35 PM.
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Jan 28, 2009, 05:12 PM
A man with too many toys
Is that a true 500 size helicopter (500mm to 550mm blades) or is just called a 500 with 400mm blades?
Jan 30, 2009, 05:56 PM
Hey Mel you beat me to it! I was going to make a similar thread I am gonna lurk here to see how people like it. Now who is going to dive in first?
Jan 30, 2009, 06:58 PM
nieves50's Avatar
I'm waiting until someone releases a T600 clone.....
I don't need or want the latest and greatest of components...
Jan 30, 2009, 07:28 PM
Some fly...some don't.
Cool, now we can have 450 sized models in the LARGE heli section too. Are they ubiquitous or what?
Feb 08, 2009, 04:47 AM
Registered User
my old lady is gonna get me one for valentines day!!!
Feb 11, 2009, 01:48 PM
Registered User
BigGuyJT's Avatar
Originally Posted by RC Man
Is that a true 500 size helicopter (500mm to 550mm blades) or is just called a 500 with 400mm blades?
Exi 500:
Length: 850mm
Height: 310mm
Main Blade Length: 425mm
Main Rotor Diameter: 970mm
Tail Rotor Diameter: 200mm
Motor Drive Gear: 12T/13T
Main Drive Gear: 162T
Autorotation Tail Drive Gear: 145T
Tail Drive Gear: 31T
Drive Gear Ratio: 1:13.5:4.68/1:12.46:4.68
Weight(w/o power system): 935g
Flying Weight: Approx 1700g

Trex 500:
●Main Blade Length:425mm
●Main Rotor Diameter:970mm
●Tail Rotor Diameter:200mm
●Motor Drive Gear:12T/13T
●Main Drive Gear:162T
●Autorotation Tail Drive Gear:145T
●Tail Drive Gear:31T
●Drive Gear Ratio:1:13.5:4.68/1:12.46:4.68
●Weight(w/o power system):955g
●Flying Weight:Approx 1700g

Looks the same to me.
Last edited by BigGuyJT; Feb 11, 2009 at 01:55 PM.
Feb 11, 2009, 10:16 PM
Our Daddy and Heli Junkie
Fred Bronk's Avatar
Just another MINI HELI!!!!

Feb 25, 2009, 10:04 PM
Registered User
heres mine i love it the parts went together smoothly and are of good quality. now i need a loan to power it lol

i would recomend this heli
Feb 26, 2009, 03:37 AM
Registered User
BigGuyJT's Avatar
Originally Posted by blackened260
heres mine i love it the parts went together smoothly and are of good quality. now i need a loan to power it lol

i would recomend this heli
How about doin it up hobby city style? Thats what I'm thinking of doing if I get one.
Feb 27, 2009, 03:45 PM
Registered User
what do you mean hobby city style?? like all cheap electronics???
Feb 27, 2009, 03:49 PM
Registered User
BigGuyJT's Avatar
Originally Posted by blackened260
what do you mean hobby city style?? like all cheap electronics???
Yeah, but I like to think of it as "enexpensive". Most of their items have proven themselves.
Feb 28, 2009, 01:47 AM
Registered User
After much research a 500 clone with quality parts was similar price to t-rex 500 ESP from reputable eBay dealer in HK.

No doubt HobbyCity/King is cheaper.
Mar 06, 2009, 06:18 PM
Brit abroad
jongp's Avatar
This is the problem - I keep looking at a bigger heli and for $229 the EXI 500 looks good but then you need ALL the other stuff!

I am thinking of either going for it and getting a Trex 600ESP with all the expensive stuff...............or.........I have bought a few pieces from R2Hobbies recently and they deliver just fine and when I had a question they responded within 24 hours - no problems!

Howsabout this:

Exi 500 $229
HY400 Gyro $15
4 x Turborix Servos $60
Turborix 60A ESC $37
Turborix 2.4 TX/RX $40
Turborix RC500 Motor $37
2 x 11.1, 2200mah, 25C $76

That's a total of $ some shipping and a few spares so an easy $600

You can go to flying hobby and get a trex 500 (not ESP) for $600 that includes better electronics than I listed above plus $60 for the same 2.4 radio gear! What to do??

The EXI 500 does not make sense I am sorry to say.
Last edited by jongp; Mar 06, 2009 at 06:36 PM.

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