wespen
01-02-2008, 05:03 PM
Performance in a small package
http://www.23hq.com/23666/2738709_cf54d4b992ae8b1716cc100ded4da571_mblog.jpg
Is it freezing outside? Are your thumbs cold and numb? Or you just want to experience flying inside? I have just a thing for you, sub-micro 3D heli, the Gaui Hurricane 200. Don’t be fouled by its size, this is not co-axial Lama, Sabre/Blade CP or Apache Attack Helicopter you can find in toy store, this is full blown 3D machine. It features CNC head, 120°CCPM swash, carbon frame and tail belt drive. It’s your big heli shrunk to 200 size with all bells and whistles. Inverted reverse, piro flips, funnels you name it, small Hurri can do it.
http://www.23hq.com/23666/2738566_56bc466591b2ea242aaa9b20901520bb_mblog.jpg
This Hurry comes from Infinity-Hobby (http://www.infinity-hobby.com) and it’s a Kit Combo deal with everything you need to make it fly, except your TX/RX. If you fly big stuff take this combo coz you won’t find spare electronics lying in your garage and no 2100 Lipo or S9650 won’t fit on it. What you need is pico or micro sized stuff.
http://www.23hq.com/23666/2738629_dcd86c1a4bc136a75c265bbf5ab43956_mblog.jpg http://www.23hq.com/23666/2738644_c44dc1a923704696b1b17e61a5ef69d5_mblog.jpg http://www.23hq.com/23666/2738657_8fe37a0a528696be4d87c4c372b98144_mblog.jpg
Size comparison with T-Rex 450
For us non-Americans shipping from USA shops actually takes longer than Asian retailers and with recent USPS unpopular prices its way cheaper. In my search for cheapest T-Rex parts I found Infinity and this is where their Hurry 200 kit combo caught my eye.
The kit comes with 3 GWS pico servos, Heading Hold gyro with Hitec HS-55 for tail servo, Gaui 12A ESC with matching 4800KV brushless motor and 800 mAh 2S Lipo.
Now don’t go compare it with cheap RTF co-axials, this is a real heli. Yes it costs just like bare-bones 450 sized but this is as much heli as its bigger brothers and its RTF.
http://www.23hq.com/23666/2738559_992176d1c5209ee921bf0974bf6d647c_standard. jpg
http://www.23hq.com/23666/2738630_c80ff8188330e53cadc41c60ac797d36_standard. jpg
Small storm
Hurricane 200 is evolution from EP100/EP100Pro line with new frame and all of the upgrades in one place. It’s turning 200mm blades over 3000 RPM and with 800 mAh lipo you can have fun from 4 to 6 minutes. Just be sure to buy some more lipos, make em a bit bigger while you at it. 1000-1100 mAh will last longer. The frame is 34mm wide, inner side to side, so dimension your lipos accordingly.
Precision machining is stunning on these small parts.
It features full carbon frames and carbon quality is top notch. I had a friend who is building 2.6m scale carbon fuses for Extras and Caps come over to check this small frame. He said quality and finish is great, no air bubbles, good stiffness and its light. Machining and cuts are solid with no fraying, good enough for me. The whole frame when assembled is rigid, with no flexing.
Head is downsized full Bell-Hiller setup with overslung flybar just like the big birds. Main shaft is supported by 3 bearings which you don’t see often even on bigger helis.
http://www.23hq.com/23666/2738655_a198c2371c6058390c0473ca62389103_standard. jpg
http://www.23hq.com/23666/2738652_a4e9d89e71214fdd4f432699602fd5cc_standard. jpg
There is a bit of slop in the head, resulting in a few degrees on play on the flybar pitch. Most of the slop is coming from the washout block bushing which has some free play on the shaft.
Not to worry about, same thing was bugging me on my T-Rex, I even go and checked the Hirobo Leptons head (they say it’s the best quality) and it was almost the same.
Tail is belt powered but tail gear is fixed to main gear so make your autos low. Head will keep spinning without power but tail hold wont last long.
I don’t prefer batman vertical fin, but its personal preference so I won’t take this as a bad thing. Servo links are direct to swash, true eCCPM setup.
http://www.23hq.com/23666/2738669_ed929e15af009d19ecc944170c2b641a_mblog.jpg http://www.23hq.com/23666/2738671_22cfdabfe9134874103a46a90dcf8fa2_mblog.jpg http://www.23hq.com/23666/2738687_28482d1669654cbcae67ef527750b299_mblog.jpg
Tail pitch slider is Raptor/T-rex 450 V2 style for minimum slop.
To sum it up, it’s like big heli just shrunk to micro size, 250 grams to be precise.
The build
http://www.23hq.com/23666/2738663_bdc625157c896d95a1c8b9e49465be79_standard. jpg
As little Gaui comes pretty much assembled there is not much to do. You need to install electronics and you are ready to go. You really need some small screwdrivers and patience or you will be searching parts all over the floor. Manual is a bit sparse and all the text is on Chinese with just exploded views and parts numbers. If this is not your first heli you wont have any trouble getting it right, as for others check http://www.gaui.com.tw/en/200h.htm for updated manual and spec.
I rechecked the frame screws and switched my attention to the head. It wasn’t really spinning free and the pitch change was a bit stiff. I found out that bottom collar was a bit tight on the bottom bearing so I loosened the grub screw and push the collar to the bearing with a bit less force. Tighten it down, no up/down play and shaft was now spinning free. Moving on up, after rechecking all the links I found out that the problem was in only one tight link that made the whole head stiff. It was the short one from the flybar to blade holders. I poped it out, cleared a bit of flashing from the mould, put it back on and problem solved. Nice and free. Be sure to check yours.
Electronics
Moving on to electronics. Since the kit comes with GWS pico servos so that’s what I will be using. They are fairly fast at 0.12sec@60° and weight only 5.4 grams, perfect fit. The frame looked a bit weak at the front servo mount but the servos tight fit stiffened it up.
Mounting screws are just a hair too small and since I’m not a fan of self taping screws in carbon frame I had to do a mod. Using my trusty old Dremel I widened the mounting holes to M2 size and used screw and nut to secure the servos. I ditched the brass bushings and use only rubber grommets since standard M2 hex screw head was big enough. Tight and vibration free but still enough flex so you don’t rip your carbon frame in a crash. Remember, lower servo on the right side to avoid clicking on the main gear.
http://www.23hq.com/23666/2738672_7f560bbd710d7594944360c40df741af_standard. jpg
http://www.23hq.com/23666/2738678_575ec32d28fe236e3fdc56d20d7aa287_standard. jpg
Setting up CCPM took some time. There is just one image on the swash setup page in the manual and its only height measurement from the frame to the swash. To help myself I trimmed a small piece of balsa to the correct height (saw it on one of the forums) and leveled the swash on top of it. It made things a lot easier.
Elevator link length adjustments are hard to do in such a small place so arm yourself with patience and enough time to set it up right. Pitch and aileron balls are second hole from the center and elevator is 3rd, which gives perfect link setup.
http://www.23hq.com/23666/2738689_84801c6c647706e1c0eda385e6e58de2_mblog.jpg http://www.23hq.com/23666/2738690_409295d100a6886241e3d820267821b3_mblog.jpg
http://www.23hq.com/23666/2738709_cf54d4b992ae8b1716cc100ded4da571_mblog.jpg
Is it freezing outside? Are your thumbs cold and numb? Or you just want to experience flying inside? I have just a thing for you, sub-micro 3D heli, the Gaui Hurricane 200. Don’t be fouled by its size, this is not co-axial Lama, Sabre/Blade CP or Apache Attack Helicopter you can find in toy store, this is full blown 3D machine. It features CNC head, 120°CCPM swash, carbon frame and tail belt drive. It’s your big heli shrunk to 200 size with all bells and whistles. Inverted reverse, piro flips, funnels you name it, small Hurri can do it.
http://www.23hq.com/23666/2738566_56bc466591b2ea242aaa9b20901520bb_mblog.jpg
This Hurry comes from Infinity-Hobby (http://www.infinity-hobby.com) and it’s a Kit Combo deal with everything you need to make it fly, except your TX/RX. If you fly big stuff take this combo coz you won’t find spare electronics lying in your garage and no 2100 Lipo or S9650 won’t fit on it. What you need is pico or micro sized stuff.
http://www.23hq.com/23666/2738629_dcd86c1a4bc136a75c265bbf5ab43956_mblog.jpg http://www.23hq.com/23666/2738644_c44dc1a923704696b1b17e61a5ef69d5_mblog.jpg http://www.23hq.com/23666/2738657_8fe37a0a528696be4d87c4c372b98144_mblog.jpg
Size comparison with T-Rex 450
For us non-Americans shipping from USA shops actually takes longer than Asian retailers and with recent USPS unpopular prices its way cheaper. In my search for cheapest T-Rex parts I found Infinity and this is where their Hurry 200 kit combo caught my eye.
The kit comes with 3 GWS pico servos, Heading Hold gyro with Hitec HS-55 for tail servo, Gaui 12A ESC with matching 4800KV brushless motor and 800 mAh 2S Lipo.
Now don’t go compare it with cheap RTF co-axials, this is a real heli. Yes it costs just like bare-bones 450 sized but this is as much heli as its bigger brothers and its RTF.
http://www.23hq.com/23666/2738559_992176d1c5209ee921bf0974bf6d647c_standard. jpg
http://www.23hq.com/23666/2738630_c80ff8188330e53cadc41c60ac797d36_standard. jpg
Small storm
Hurricane 200 is evolution from EP100/EP100Pro line with new frame and all of the upgrades in one place. It’s turning 200mm blades over 3000 RPM and with 800 mAh lipo you can have fun from 4 to 6 minutes. Just be sure to buy some more lipos, make em a bit bigger while you at it. 1000-1100 mAh will last longer. The frame is 34mm wide, inner side to side, so dimension your lipos accordingly.
Precision machining is stunning on these small parts.
It features full carbon frames and carbon quality is top notch. I had a friend who is building 2.6m scale carbon fuses for Extras and Caps come over to check this small frame. He said quality and finish is great, no air bubbles, good stiffness and its light. Machining and cuts are solid with no fraying, good enough for me. The whole frame when assembled is rigid, with no flexing.
Head is downsized full Bell-Hiller setup with overslung flybar just like the big birds. Main shaft is supported by 3 bearings which you don’t see often even on bigger helis.
http://www.23hq.com/23666/2738655_a198c2371c6058390c0473ca62389103_standard. jpg
http://www.23hq.com/23666/2738652_a4e9d89e71214fdd4f432699602fd5cc_standard. jpg
There is a bit of slop in the head, resulting in a few degrees on play on the flybar pitch. Most of the slop is coming from the washout block bushing which has some free play on the shaft.
Not to worry about, same thing was bugging me on my T-Rex, I even go and checked the Hirobo Leptons head (they say it’s the best quality) and it was almost the same.
Tail is belt powered but tail gear is fixed to main gear so make your autos low. Head will keep spinning without power but tail hold wont last long.
I don’t prefer batman vertical fin, but its personal preference so I won’t take this as a bad thing. Servo links are direct to swash, true eCCPM setup.
http://www.23hq.com/23666/2738669_ed929e15af009d19ecc944170c2b641a_mblog.jpg http://www.23hq.com/23666/2738671_22cfdabfe9134874103a46a90dcf8fa2_mblog.jpg http://www.23hq.com/23666/2738687_28482d1669654cbcae67ef527750b299_mblog.jpg
Tail pitch slider is Raptor/T-rex 450 V2 style for minimum slop.
To sum it up, it’s like big heli just shrunk to micro size, 250 grams to be precise.
The build
http://www.23hq.com/23666/2738663_bdc625157c896d95a1c8b9e49465be79_standard. jpg
As little Gaui comes pretty much assembled there is not much to do. You need to install electronics and you are ready to go. You really need some small screwdrivers and patience or you will be searching parts all over the floor. Manual is a bit sparse and all the text is on Chinese with just exploded views and parts numbers. If this is not your first heli you wont have any trouble getting it right, as for others check http://www.gaui.com.tw/en/200h.htm for updated manual and spec.
I rechecked the frame screws and switched my attention to the head. It wasn’t really spinning free and the pitch change was a bit stiff. I found out that bottom collar was a bit tight on the bottom bearing so I loosened the grub screw and push the collar to the bearing with a bit less force. Tighten it down, no up/down play and shaft was now spinning free. Moving on up, after rechecking all the links I found out that the problem was in only one tight link that made the whole head stiff. It was the short one from the flybar to blade holders. I poped it out, cleared a bit of flashing from the mould, put it back on and problem solved. Nice and free. Be sure to check yours.
Electronics
Moving on to electronics. Since the kit comes with GWS pico servos so that’s what I will be using. They are fairly fast at 0.12sec@60° and weight only 5.4 grams, perfect fit. The frame looked a bit weak at the front servo mount but the servos tight fit stiffened it up.
Mounting screws are just a hair too small and since I’m not a fan of self taping screws in carbon frame I had to do a mod. Using my trusty old Dremel I widened the mounting holes to M2 size and used screw and nut to secure the servos. I ditched the brass bushings and use only rubber grommets since standard M2 hex screw head was big enough. Tight and vibration free but still enough flex so you don’t rip your carbon frame in a crash. Remember, lower servo on the right side to avoid clicking on the main gear.
http://www.23hq.com/23666/2738672_7f560bbd710d7594944360c40df741af_standard. jpg
http://www.23hq.com/23666/2738678_575ec32d28fe236e3fdc56d20d7aa287_standard. jpg
Setting up CCPM took some time. There is just one image on the swash setup page in the manual and its only height measurement from the frame to the swash. To help myself I trimmed a small piece of balsa to the correct height (saw it on one of the forums) and leveled the swash on top of it. It made things a lot easier.
Elevator link length adjustments are hard to do in such a small place so arm yourself with patience and enough time to set it up right. Pitch and aileron balls are second hole from the center and elevator is 3rd, which gives perfect link setup.
http://www.23hq.com/23666/2738689_84801c6c647706e1c0eda385e6e58de2_mblog.jpg http://www.23hq.com/23666/2738690_409295d100a6886241e3d820267821b3_mblog.jpg