PIGI - tips? how to build it?  
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HYPERION Z5045-18 TURN BACKMOUNT TYPE BRUSHLESS OUTRUNNER MOTOR
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All Forums >> Electric Aircraft Universe >> 3D Electric Flying! >> PIGI - tips? how to build it?
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PIGI - tips? how to build it? - 9/26/2004 10:12:35 PM   
Rojoyinc


 

Posts: 34
Joined: 10/26/2003
From: Grand Rapids, MI, USA
Status: offline 		I just got a PIGI - and the docs are non exsistant, there is sort of a plan view. anyone have a website that shows it or pics/step by step? I guess I could figure it out but don't want to make any mistakes. The slot on the bottom of the fuse where the wing goes in... do I glue that slot closed after the wing is in?
Any best order to start? I think I'd put the wing in first? then hing the surfaces? I'm also not sure of the battery compartment hole, should it go in the bottom deep enough to cut into the wing too? Or leave the batteries hanging out of the bottom a little?
       Post #: 1

RE: PIGI - tips? how to build it? - 9/27/2004 5:03:19 PM   
Rojoyinc


 

Posts: 34
Joined: 10/26/2003
From: Grand Rapids, MI, USA
Status: offline 		Got it built in one night.
Helped looked at the threads on here to see some pictures of various areas.
Was a little confused at the tail wheel and rudder, but figured it out and it is steerable as it comes out of the box. (by the bend of the wire for the tail wheel).

Was hoving in a loose gripped hand last night in the basement. = )
Now my worries are drawing to many amps for Jeti 30.

(in reply to Rojoyinc)
       Post #: 2

RE: PIGI - tips? how to build it? - 10/4/2004 2:56:41 AM   
ElectricDurango


 

Posts: 69
Joined: 2/7/2004
From: Great Falls, VA, USA
Status: offline 		Have you done a maiden yet? If it flew well, what was your CG measurement from leading edge?

(in reply to Rojoyinc)
       Post #: 3

RE: PIGI - tips? how to build it? - 10/4/2004 4:01:55 AM   
Rojoyinc


 

Posts: 34
Joined: 10/26/2003
From: Grand Rapids, MI, USA
Status: offline 		I used the picture - they show it in the center of the core of the wing under the RZ compartment. I just rough it in for the first flight and make sure I'm a bit nose heavy for safety. I then started moving the battery back until the plane got a little flakey. I then know I'm on the edge. I have some awesome high end elec. planes/gliders, and I have to admidt this is probably my favorite. And I haven't even flown it with the lipo yet! - still awaiting the delivery of my back ordered charger from HL.

First pic - top view of battery (final fitting and placement of Lipoly pack
2nd pic - tail feathers needed some support. Carbon fiber (sport kite stand off sticks) to top the rudder and elevator from flexing at extreme throws
2nrd pic - side view, went and shot these to reply to your msg.
4th pic - 2nd night out flying it pic, with temp 4/5 8 cell nimh pack under it with 2 velcro straps. (keeping it nose heavy) my actual balance point due to my heavy tail is in front of RX compartment. (heavy tail prior to carbon fiber supports. (They weigh nothing).



< Message edited by Rojoyinc -- 10/4/2004 4:05:24 AM >

(in reply to ElectricDurango)
       Post #: 4

RE: PIGI - tips? how to build it? - 10/6/2004 2:28:27 AM   
Berwyn Bill



Posts: 188
Joined: 7/19/2004
From: Berwyn, IL, USA
Status: offline 		Glad you're enjoying your Pigi! If you're using the stock set up from HL, you shouldn't have to worry about the 30 Amp Jeti. My Whatt Meter shows between 24-26 Amps on the bench at full throttle and the Jeti can go a bit beyond the 30 Amp max, so that should cover any additional draw b/c of wind, etc. You'll love the LiPo's! If you don't mind soldering your own connectors, try http://www.espritmodel.com/. They have the TP packs in stock all the time and the price is only $.10 more than HL. Nice folks too. They also have a nice selection of CF rods and tubes.
I see you went with Greg Covey's tail set up with the CF rods. Me too. Makes it quite study. I also added a CF rod set into a shallow groove along the length of each aileron (about 1/3 of the way back from the hinge line). It seems to take a bit of the flex out of the ailerons and give my rolls a bit more snap.
I play with the CG all the time. I velcro my packs on the bottom so I can move them back and forth fairly quickly. You can really change the character of this craft with a 1/2 inch or so! Now I have to find some better landing gear so I can taxi on our grass field without embarrassment!

Berwyn Bill

PS - Nice shot of the plane on the center line.

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< Message edited by Berwyn Bill -- 10/7/2004 4:57:13 AM >

(in reply to Rojoyinc)
       Post #: 5

RE: PIGI - tips? how to build it? - 10/6/2004 4:42:20 AM   
Rojoyinc


 

Posts: 34
Joined: 10/26/2003
From: Grand Rapids, MI, USA
Status: offline 		Came up with my own tail support idea, I'm a sport kiter and have lots of carbon rods around. It would torque, so figured it was the easiest way to add some support.
I flew with the battery now above the wing - and it was a totally different plane. Loop rate was now even both directions, rolls were faster - was really fun tonight.
Still waiting for my lipo charger = /

< Message edited by Rojoyinc -- 10/6/2004 4:46:01 AM >

(in reply to Berwyn Bill)
       Post #: 6

RE: PIGI - tips? how to build it? - 10/6/2004 8:34:19 PM   
Berwyn Bill



Posts: 188
Joined: 7/19/2004
From: Berwyn, IL, USA
Status: offline 		I did my tail the same way after seeing Greg's in the old Pigi thread. It does the job quite nicely, no? I assemble golf clubs so all of my spare CF is a bit too big (but might make a nice tail boom on a little flyer!).
Great idea with the above wing battery. I sometimes forget about moving the CG on the vertical axis. I'm going to try the Microlite CF landing gear. It ws only $12 and have heard fair reviews of it. I'll post some pics once it's arrived and installed.

Berwyn Bill

(in reply to Rojoyinc)
       Post #: 7

RE: PIGI - tips? how to build it? - 10/6/2004 8:55:05 PM   
Rojoyinc


 

Posts: 34
Joined: 10/26/2003
From: Grand Rapids, MI, USA
Status: offline 		wear can I get more info on this gear? I'd like to change mine, dropping it in the grass makes a mess of the gear, so I try to put it down on the blacktop. Wondering if my side saddle battery mount is killing some of my airfoil? wondering if I should turn the battery longways and cut a bigger hole. Still no lipo charger - but it's driving me crazy - and the 4200mah had 11.1 v charge in it when it arrived.
I put it in for a couple minute flight. (didn't want to take it down to low - because I can't recharge it for a while yet until charger arrives).

I wasn't overly impressed with the verticle. I was able to go vertical with a good running start, but going vertical out of a hover wasn't happening. Even the hover was a max power thing. (was this cuz the battery wasn't totally charged)?
Wondering if I should try a lighter 2100 instead of a 4200 which is fairly heavy.

(in reply to Berwyn Bill)
       Post #: 8

RE: PIGI - tips? how to build it? - 10/6/2004 9:08:02 PM   
Rojoyinc


 

Posts: 34
Joined: 10/26/2003
From: Grand Rapids, MI, USA
Status: offline 		I found the gear at NESAIL.
size is of concern

Height (top to axle)- 3.5"
Width (axle to axle) - 7"
Weight (with axles)- 9.5 gms

present gear is about 5" tall
Present gear span is about 11".

so it won't be nearly as wide and add 3/4 to .5 inch for tires and that doesn't get the prop off the tarmack by much!

(in reply to Rojoyinc)
       Post #: 9

RE: PIGI - tips? how to build it? - 10/7/2004 4:32:07 AM   
Berwyn Bill



Posts: 188
Joined: 7/19/2004
From: Berwyn, IL, USA
Status: offline 		Yeah, the height thing is a concern for me too, but I can always add a bit to the gear mount that's already there to get a bit more clearance. I don't want to add too much or the weight savings from the CF go right out the window. But that original gear is just so pitiful! If I can't live with the CF gear, I'll just keep looking. I've seen a lot of other CF gear out there but the $$ started getting a bit steep. Hmmm, I could move the new CF gear a bit back, giving me a bit more clearance for when I use the 12x3.8. I'll just have to wait until it gets here.
As for your vertical, I don't know how much the side-saddle battery affects the airfoil but I'm not sure the battery charge is the culprit. I've gotten good vertical when I'm below 11.1v on my TP4200 and hovering is just under 1/2 throttle. It's tough to say. Depending on how fast your ESC starts powering down for low voltage, you could just be suffering the effects of a low pack. The vertical even at its best is a steady ascent upwards, not exactly rocket like (though with a 2000mah, 15C pack, it's a bit better). Believe me, I know waiting for that charger is killing you but I'd hold off on any more cutting until you get a good charge on the pack and have a go at it. Also, what timing do you have the Jeti set at? I think the blue Jeti have four settings with setting 3 & 4 being the "hardest" (around 20 and 30 degrees respectively). In my experiments with timing on the PJS 1000, you get a bit more oomph between 20-30 degrees timing at a minimal cost of efficiency so maybe try setting 3 or 4. The higher timing seems to be the norm for most outrunner motors. I use a 40 amp Jeti/Hacker Master ESC so I can set the anywhere between 0-30 degrees and like to keep it at 25 for the 11x4.7 prop. Just an idea.
Wish Grand Rapids were a bit closer I'd loan you my AF 109 for a charge.

BB

< Message edited by Berwyn Bill -- 10/7/2004 4:56:18 AM >

(in reply to Rojoyinc)
       Post #: 10

RE: PIGI - tips? how to build it? - 10/7/2004 3:13:13 PM   
Berwyn Bill



Posts: 188
Joined: 7/19/2004
From: Berwyn, IL, USA
Status: offline 		Looks like the Microlitel CF gear are backordered. Looks like I'll have to wait.

BB

(in reply to Berwyn Bill)
       Post #: 11

RE: PIGI - tips? how to build it? - 10/7/2004 4:59:24 PM   
Rojoyinc


 

Posts: 34
Joined: 10/26/2003
From: Grand Rapids, MI, USA
Status: offline 		Where did you order the gear from, NESAIL has it. ( think in stock )

I have blue jeti 30 - it has hard and soft, I switched it to hard (didn't really see any difference) other than it beeps twice on boot up rather than once. What confuses me is the way I see some folks have their battery back behind the gear mount (wood) mine balanced about in the middle of the wood. Making it hard to cut out an area in the bottom to mount it.

< Message edited by Rojoyinc -- 10/7/2004 5:01:09 PM >

(in reply to Berwyn Bill)
       Post #: 12

RE: PIGI - tips? how to build it? - 10/8/2004 1:54:00 AM   
ElectricDurango


 

Posts: 69
Joined: 2/7/2004
From: Great Falls, VA, USA
Status: offline 		My 3s-2100 20c came in today along with my Triton charger........the battery weighs 8.9oz, my other 8cell Sub C 1700 NICAD weighs 13.2oz........so i should see a big improvment right?


I cant charge it yet because the Triton comes with bananna jacks and no charger leads....so i have to make a bananna to deans, and a bananna to jst, and a bananna to tamayia style.....in order to charge any of my batts.

(in reply to Rojoyinc)
       Post #: 13

RE: PIGI - tips? how to build it? - 10/10/2004 12:55:23 AM   
ElectricDurango


 

Posts: 69
Joined: 2/7/2004
From: Great Falls, VA, USA
Status: offline 		OK my pigi with lipo setup flew freakin awsome......for about 10 mins.

my PJS 1000 3d motor burn out totally....it locked to the point where you cannot turn it.


my setup.

pjs 1000 3d
2100 20C 3-cell lipo (42amp)
jeti 30 amp advanced
APC 11x4.7

The above was recommended by peeps online. I think i was running to much wattage and burned up my pjs.

So i went back to LHS and bought another PJS 1000 and a wattage ammeter, along with a 9x6 prop.
with 9x6.....
my volts: 11.1
my amp: 25.8-26.2
my watt: 242-251
is this too much? will i blow aout another motor?

(in reply to ElectricDurango)
       Post #: 14