racingjeff1

Keeping the Kougar post going. Here is my just completed lightened and electrified Kougar in CF-101 voodoo type trim and colours. The fin, rudder, hoz stab are all stick built, long holes in the fuselage, 1/16" sheeting, eliminated big under nose balsa block, sullivan golden rods, foam wing tips, modified bulkhead to allow cockpit area to be removed for battery changes. RTF weight is 5lbs, the battery is 18oz of that. Power is a 37-40-650KV, 60A ESC, 4A UBEC, 7.4V 800Mah lipo servo battery, main battery 15-20C 5000 Mah 4 cell, prop APCE 14x12 cut to 13". Power is 740 Watts, thats a nice 148W per/lb. This is a back up motor, you can easily get over 800Watts with a 35-48-850KV.

jollyroger

My Feedback: (6)

Jeff, Your Kougar looks really great! Mine also came out to 5# complete. I don't have a pilot for it yet, but he shouldn't add too much to it as long as he watches his weight. LOL
I'm going to replace the Axi 2826-10 with a Hyperion 4020-10 for more power handling capability. I plan to use a 5S Lipo. I'd like to get her to about 80 MPH or so and it's going to take all of 800 watts according to E Calc .
Keep us posted when you get it flying.
cheers

juice90

Its been an interesting journy the last few days on rcu. First, I came across a post about the sig kadet and now this one, of the kougar.

I learned to fly on a kadet and I remember many many moons ago, sum buddies haveing the Kougar. They were a great flying plane. Either 40 sized or the one feller who put an asp 61 in his ( useing it as a trainer no less )

The most interesting thing is, just last week, I picked up a used kougar as I was looking for a quick throw in the car and go fly airplane.
Wasn't pretty but after tinkering one it the last couple of days, doesn't look so bad anymore. ( should have taken before pics ) The covering is a lil uneven and beat up, but the addition of sum stripeing cleaned up the looks.

Powering it with an asp 46 ( i hope) and I am debateing either reg muffler... or a tuned pipe I'll decide shortly after I see where the cg is going to be.

As I said, its been an interesting journey. What was old, is new again.Or so it seems. lol... been flying for 26 years now and appears this plane at least, is standing the test of time. And its interesting that it too, is makeing the move towards the electric set ups as well.

All of you have done very nice jobs on your planes and I wish all of you the best of luck with them, and happy flying.

Juicer

racingjeff1

Hi Jollyroger, Yes I use MCalc too, really great tool, I also have a bench test rig to physically test the best MCalc combos. With a 5 cell you will be really cranking some power, into 1000W range I suspect. I run electronics and motors from Hobbycity and the pilot is from there too, can't beat $4.85 here's the link http://www.hobbycity.com/hobbycity/s...idProduct=4075 , you have to cut him down but he is the correct scale size. I thought about trying a 3 blade on this as well, other tests have shown nice results. The only other issue I come up with is the potential for heat buildup everything is so smooth with the Kougar nose. I set the motor a little further ahead so the spinner has more space behind it , hoping for some airflow and made the scoop under the nose as well, but from tests and other aircraft this all should be fine.

racingjeff1

Hey Juice90 did you see the guy in the early pages of this thread who did his up in Snowbirds colours?

juice90

Hi ya Raceingjeff1 ya I did... wow.. beautifull job too. Almost looks like a real snowbirds jet...........

racingjeff1

Ya looks nice, its different. I flew mine yesterday, the 740 Watts of power was right on. A careful slow takeoff roll it tracked real nice hit full throttle at wheels up and it went verticle. Can't beat electric power.

submikester

My Feedback: (6)

Wow, that is a nice looking Kougar man.

bayareajeff

Very nice Jeff.. Makes me want to build another..

J

racingjeff1

Funny about that, when I was building this one I was considering how much work would be involved to make an EDF version. I started drawing that up today for a 95mm 7 blade unit that would put 1000Watts output. I think the basic airframe would make for a nice EDF trainer.

bayareajeff

Thats true... If you could get the thrust... would be sweet.. Maybe sig would buy the design from ya..

J

racingjeff1

Ya the thrust is no problem, some calculations show it can be done with a 4 cell, 5 is better. The problem is that fan units are ahead in tech of motors which are ahead of batteries. The project has to have a decent flight time at a decent price. I am working numbers for 5000Mah 30C which are pretty reasonable from hobbycity now. But those A123's really show promise at 60C discharge. The prop Kougar was pretty light until I dropped that 18oz battery in the front.

HeliTB

Well Well...I gotten rejuvenated to complete my Sig Kougar Build for our club May '08 contest.

Part 1
I decided to put two aileron servos in the wing, to reduce the chance of anything hitting inside.

You must sand the servo box at slant from front to back, since the wing core width is less at the rear

HeliTB

Part 2

HeliTB

Part 3

You must turn the wing over and cut a trench to run the servo wire. I cut about 5/8" trench V cut with a new #11 blade on each side.

You can barely see it but I made a tube to pass the servo wire through with regular paper. This way I can replace the servo without tearing up the wing.

I forgot mention be careful when removing the wing skin and foam. Yes, you must remove both you will not be able to remove just the wing skin. After you glue the tube you can trim some foam and re-glue the wing skin and foam you removed to run the trench.

HeliTB

Part 4

Completed two aileron servo modification.

Took me about 4 hours to do the modification. Well worth it. I can do Flaperons, Airbrakes and Spoilerons. It will also make trimming the ailerons alot easier since they each have there own servo.

BTW: It only took that long since I had Tech Support (My Flight Instructor, Good Friend and Mentor) Thanks JBen!!!

jollyroger

My Feedback: (6)

Nice job heli. very simple method and easy to do. Sometimes make me think about ordering another wing and trying it myself. Would like to install retracts as well. Hmmmm, well, maybe next year.

HeliTB

jollyroger...It wouldn't be that hard to do with the wing covered. I did the same modification on my Alpha 40 Trainer, which was an ARF. That was a little bit easier since it had wing spars instead of solid foam, fishing the wiring and mounting was simple.

Thanks for the kudos.

jollyroger

My Feedback: (6)

Heli, I've done that for a number of built-up wings including the venerable Sig Seniorita, which had no ailerons. I really don't care for the torque rod setup unless it's really neccessary. As far as retracts, there is a thread regarding installation somewhere. Having checked the CG with the battery pack, I found there would be enough room for even a Robart pneumatic system. Installed with scale struts and you have a great looking plane.
Yes, I could still convert the ailerons, but I'll fly it this way for now.
I wonder how difficult it would be to install a flap system?
1: Glue ailerons directly to wing trailing edge and shape.
2: Mark out aileron/flap locations with the proper length and width.
3: Cut out both, using part of the wing for control surfaces.
4: Instal servos for ailerons and one for flaps.
Oh now, I can see where one could get crazy with this plane.[sm=bananahead.gif]
Anyway keep up the good work and let's all hope some nice spring weather.
cheers jollyroger
see you in Toledo!

HeliTB

jollyroger...I would love to go to Toledo. I'm flying to Miami with the wife on the 4th. It's funny you mention it, I thought about doing flaps while I was doing the modification, but I figured I would have to use OS 55AX because this little plane is picking up weight. I will begin covering sometime next week.

jollyroger

My Feedback: (6)

Hitec makes a nice little wing servo, HS-125MG.Super slim and lightweight, produces standard sport servo torque. I have a glider with very thin wings and will have to use a pair of these for the ailerons. These would reduce the weight from the standard size servo.
The Toledo show is my little getaway before the flying season begins. In the past, I've spent tons of money (read:not married), but this year I'm cutting way back...(yeah right) Let's see if I can resist all those bargains and swapshop goodies. LOL[&o]
see ya jollyroger

racingjeff1

Flew the Kougar 101 again today, this time with a balsa built wing 1" wider plus with 1 1/2" ailerons. Seems to be more responsive in rolling. This is the wing I want to use on the EDF fuselage.

HeliTB

racingjeff1...Do you have some pics to post of what you described above?

racingjeff1

Ya I will take a couple today, its the wing only right now the EDF fuselage is still a drawing.

ramcfarland

My Feedback: (44)

I found myself out of planes way back in 77 and bought a perfectly Monokoted Sig Cougar from an old friengd Gary Horn. The Cougar is an easy flyer and lands on a dime.

Gent's enjoy your Cougars its on well engineered kit and an EXCELLENT sport pattern ship-Enjoy