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e-JR Voyager E > JR PARKMITE

steph280
Key Veteran
Location: Irvine, California

T-rex tail servo mount will fit if you sand it down.

now thinking back, I am a bit suprised how much weight those Hornet can lift when it has to haul those nimh packs around. I am hoping the TP 3s-730 should make some dramatic difference in flight characteristic since it's almost half the weight of 1320. It is the recommended pack in the Parkmite manual addendum.

Logitech would be perfect. But I got a good deal on one of those telebee 6oz gyro, so will give those a try first.

I wonder if any of the darth fuselage will fit the parkmite?

06-05-2007 04:44 PM

wsilvio
Heliman
Location: Boston, MA

I went ahead and ordered a 2100 gyro for it. Now I have to contemplate getting smaller batteries! After looking at the comparison pics you posted, this thing is small! It looks even smaller than a blade cp.

06-05-2007 04:56 PM

wsilvio
Heliman
Location: Boston, MA

So my parkmite arrived today. I started building it. It's a really nice kit. I would say that anyone out there thinking about this heli should go for it. It's like the lepton of the micro world! I hope it flies as good as it looks!

Anyone know what pinion I should use with the park 400 4200kv?

-will

06-12-2007 03:11 AM

steph280
Key Veteran
Location: Irvine, California

I am running 11T on a 3600kv motor and headspeed is just right at 3400RPM. I would go with 10T on a 4200kv motor and adjust throttle accordingly.

I got the telebee 6g gyro installed. This gyro is extremely small, much smaller than I expected. However, it does not lock the tail as well as the 401, which is expeted. Other than the occassional wagging, it holds relatively well for the size/price. I will need to play around with the settings some more. But Logitech would be perfect for this heli IMO.

BTW I got a CC Phoenix 10 ESC for it. About the size of my thumb nail and works really well. Good ESC to keep the weight down.

Word of advice, make sure you losen up the links while building the heli as per instruction. most links are too tight for the little micro servos.

Still waiting for my 730 battery pack...

06-12-2007 03:33 PM

wsilvio
Heliman
Location: Boston, MA

Are you using the stock blades at that head speed? If you get 3400 HS on that motor, maybe the 4200kv is overkill! Plus it adds weight.

Yeah, I usually spend a lot of time getting the links smooth. It's time consuming, but always makes a big difference. I'm going to try futaba micro digitals all the way around. I think the bec in my spin 11 controller can handle it.

06-12-2007 04:08 PM

steph280
Key Veteran
Location: Irvine, California

3600kv and 4200kv can be had in the same 370 motor size. I beliebe you can also order the speed 400 size in either kv. So it's not just about the kv, but the max watt rating of the motor (physical size). I am using the Hacker B20-22s so it's more of 370 size. But I don't think it would mind having a speed 400 size motor.

I did some more flight today and ended up putting a GY240 in place of the Telebee. Needless to say the GY240 is staying in there. Do you know who has Logitech in stock?

06-13-2007 04:53 AM

wsilvio
Heliman
Location: Boston, MA

I ordered mine from grand rc. I think it's www.grandrc.com

I think Heliproz carries it, and readyheli. Although the last time I checked, readyheli was out of stock.

You might want to check this out too:

http://www.rcgroups.com/forums/showthread.php?t=670786

-will

06-13-2007 06:04 AM

steph280
Key Veteran
Location: Irvine, California

Thanks. Found one at grandrc. Found out Hitec will be selling these under their brand. I might just hold off until they are available for better service/warranty.

06-13-2007 06:40 AM

wsilvio
Heliman
Location: Boston, MA

Did you guys find that the setup instructions were accurate? For instance, the 2mm for the tail slider distance at hover, and the fact that the heli has some pitch at neutral stick instead of zero. On my machine, it looks like 2mm for the tail is way too much pitch. I guess the proof will be when I finish and take it up for the first time. Also, was there a lot of play in the tail pulley? Is it ok to shim this? Thanks.

will

06-17-2007 04:59 PM

wsilvio
Heliman
Location: Boston, MA

So I made the first test flight on the parkmite last night. This think is so quiet and smooth. I still have tail issues to figure out. There is a lot of slop between the tail pully and tail case. I think I'll try to shim it with a washer. My futaba micro digital for the tail was defective and will have to be sent back, so all I had was an hs-50. Worked ok, but not great. Also, I couldn't get the tail servo plate to stick to the boom so I used a trex servo mount. It worked, but the servo sticks out to far. I'm sure this has an effect on the tail as well. I have a servo mount coming from freestyle-hooby in Australia that should fix that.

So far though, I think this heli has a lot of potential. The cyclic is very precise especially with all digital servos!

06-21-2007 03:27 PM

steph280
Key Veteran
Location: Irvine, California

I also have the tail pulley play problem. Used one of those extra small shim from T-Rex's mixing arm and all play went away. The tail pitch slider is a bit rough on the tail shaft, which causes the rudder servo to work extra hard. Hopefully this will wear in. I got my 3154 mounted on the tail fin with the included double sided tape and it sticks ok. But my friend claim his tape lost its stickness after a while. Tried those 3M double sided tape but the foam makes the servo move a little.

Tried Thunderpower 3s-730 and 3s-910 packs. 730 does not put out enough amp so RPM is noticably lower. 910 is perfect and still balances the heli. Also got a Logitech 2100 gyro on there and it is one sweet gyro. But I think I need higher headspeed as the tail is kind of "weak".

BTW my friend crashed his earlier this week. Typical crashed parts prices which weren't too bad. But if you break the main frame be prepared to have a sticker shock!

06-21-2007 05:56 PM

wsilvio
Heliman
Location: Boston, MA

Thanks for letting me know about the packs. I was just about to order the 730's.

Maybe I'll try to mount the servo on the tail fin. I was trying to use the other mount. I think I'll take the 3154 off my maxir for the time being and put it on the p'mite. I also like the 2100t gyro.

You could try larger tail blades to get a stronger tail. Maybe hornet blades.

06-21-2007 06:38 PM

Fred I
Senior Heliman
Location: Irvine, CA

Yep, per steph's comment, I crashed mine. It looked bad at first, but only minor parts need replacing. Shouldn't have flown during windy condition. Parts are obviously more than the trex but not too bad overall. I must admit, this is a really fun little heli. Not for beginner for sure though. The hard part on this heli is making the tail holds.

06-21-2007 10:32 PM

wsilvio
Heliman
Location: Boston, MA

I worked on the tail tonight, and got it holding pretty well. At least flying in the basement. I'll take it out this weekend to see how it does in forward flight. I shimmed the tail gearbox, and put the tail servo on the tailfin. It definately is a fun little heli. I'm impressed so far. I do need more head speed. The 10 tooth on the 4200 e-flight only gives me 2300 rpm. I'll try a 12 tooth and see what happens there. If not, I might try a razor or hacker b20-22s.

Steph280, did you have any problems mounting the hacker, and also did the pinions fit, or did you drill them out?

Also, on your 2100t, does your tail have a little bounce after turn the tail?

06-22-2007 03:29 AM

steph280
Key Veteran
Location: Irvine, California

The Hacker mounted ok. I didn't use the heli's heatsink plate, but the fiberglass plate that came with the motor. Not that it's needed, but I didn't want to take any chance of the mounting screws being too long.

Yes I did have to drill out the pinion to fit. I believe the pinion is for 2mm but Hacker shaft is 2.3mm. Had to drive all over town to find metric sized drill bit.

Yes I also noticed the little bounce on the tail. Still haven't had the time to play with the gyro yet, but I suspect the spin rate (delay) adjustment may cure it.

On the last flights I started to get some glitches with my futaba micro receiver. So I popped in a Berg 7P and just have to test it again. Hopefully those Futaba 2.4ghz modules will come out soon.

06-27-2007 06:27 PM

wsilvio
Heliman
Location: Boston, MA

Let me know how the berg 7 works. I had some glitching on my r146ip the other day. Basically went into lockout briefly. I recovered, so no damage. I've ordered a second parkmite, and was thinking of putting in the berg 7 because it's so small. Spectrum is really the way to go, but don't know which radio I want to get. I might get a module for my 9c, or go with the jr9303. The thing is, My 9c is only a year old, and I wasn't planning on buying a new radio any time soon.

06-27-2007 06:40 PM

wsilvio
Heliman
Location: Boston, MA

So I put a 12 tooth on the park 400, and only got up to 3000 rpm. I'm guessing that I got what I paid for. I'm building another parkmite, so I might put the hacker in it.

07-05-2007 10:30 PM

Flying Cat
Heliman
Location: Cary, NC - USA

I changed motors in my Parkmite yesterday. It had the Hacker B20-22S with 11T pinion. Head speed was 2600 RPM, but and the end of the flight the motor temp was about 130-140F. CC-10 ESC temp about 120-130F

So I decided to install a JGF 400DH. I first put 11T pinion. Head speed was 2900-3000 RPM. However, the CC-10 ESC was quite hot 150+F and the batteries (TP 1300 prolite) were hotter than with the Hacker.

Next, I replace the pinion to a 10T pinion. Ah, much better now! Head speed is 2750 RPM, and the end of the flight motor temp is 90F, ESC temp 120F, and battery just warm.

What I want to do next is to find better tail blades. What tail blades are you using that perform better than the stock tail blades?

Thanks,

08-12-2007 03:08 PM

cy-fan
Heliman
Location: Waterloo, Ontario Canada

Hi Guys,

I am working on completeing my Parkmite at the moment. I have done some mods to it by incorperating the lower parts of the Hornet 2. The lower flat plate and landing gear fit nicely to the Parkmite aluminum frame. The plate allows a nice place to put the receiver and gyro on the very front. This allows the battery to be in the open under the mainshaft.

I have alos ordered the JGF 400DH and I am waiting for it to arrive. My concern with this motor is that the CC-10 would be to small for the current ( over 20A) that the 400DH can consume. It looks like Flying Cat has not exceeded the limits of the CC-10. Flying Cat, are you doing forward flight with your Parkmite? The CC-10 is quite a bit lighter than the CC-25.

I also have some MS composite tail blades that I am going to use. These are very stiff and light. I expect that they will perform better than the stock plastic blades. For mainblades, I have some MS Composite 255mm blades.

Regards,

Richard

08-16-2007 03:40 AM

Flying Cat
Heliman
Location: Cary, NC - USA

I checked current consumption with the 400DH motor at 2750 RPM and 0 degrees, and it is 5.3 AMPS. Hence, it is within the limits of the CC-10 ESC. I do fly FF and started to do loops & rolls. I have discovered that the best batteries for this heli are the Thunder Power 910 mAh. The TP 1350 mAh allows for very long flights, but when the heli does loops you can see it is a bit heavy.

I have also ordered a set of MS Composit Hornet carbon tail blades for my Parkmite.

With regards to the MS Composit 255 main blades, I decided not to order them because they are listed as being 5mm thick where they attach to the blade holder. But the Parkmite blade holders are only 4mm wide.

Did you have any problems installing the MS Composit main blades? Also, it would be great if you could post a picture of the lower flat plane you are using.

I agree about the Hornet landing gear. I am using it as well

08-16-2007 06:00 PM

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