Started the Couger

Guernsey

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The aircraft we are talking about with the 160hp is a Sierra , With our aircraft with heavier motors, we now have a bigger nose leg from a 11/4" to 11/2" dia. The fire wall is moved to suite the weight of motors used like the Sierra if using a 80hp or a 120hp there is 2" difference .
I realise that it is being fitted in a Sierra but you did mention its performance in a Cougar.
Alan.
 

Garry Morgan

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Good point Alan, We have a larger nose leg 11/2"x 83 thou heat treated,as it will have an extra 100lb on it, the C/G would move, so the fire wall would also move. My blue Cougar nose length is ok ,you may notice the grey Cougar has a longer nose,this is good for a 4 seater with the Jab engine weight,where my blue one is limited to 75kg in the rear seat. I am also looking at a longer canopy (my new sierra canopy we made a 3m long bubble),a lot less curve)and move the join aft for better entry to the back seat,a better folding seat,also a lot more sweep on the fin.
 

Guernsey

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Good point Alan, We have a larger nose leg 11/2"x 83 thou heat treated,as it will have an extra 100lb on it, the C/G would move, so the fire wall would also move. My blue Cougar nose length is ok ,you may notice the grey Cougar has a longer nose,this is good for a 4 seater with the Jab engine weight,where my blue one is limited to 75kg in the rear seat. I am also looking at a longer canopy (my new sierra canopy we made a 3m long bubble),a lot less curve)and move the join aft for better entry to the back seat,a better folding seat,also a lot more sweep on the fin.
Thanks for the reply Gary, I knew that you would be improving your aircraft all of the time, I just wanted to let everybody know on this forum. :score 010:
Alan.
 

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Sloper

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Goodaye all

Been a while, not much work done on the plane but a heap of car maintence.

Have a idea about the elevator trim that l would like to run past people.
Always trying to have redundacy l wanted to be able to use the elevator trim to fly the aircraft if the elevator cable or controls failed.
Flown a warrior with the trim wheel just for the experience (not landing or take off)

Have a look at the pic and give me some thoughts.



First the trim wheel is conected to a relay lever by a continuos length of bungee.
Then connected to the relay lever is a Bowden cable that is connected to the elevator horn.
Simple l think.
l would expect to have a number of positions in the relay lever to get the force required right and the bugee cable would be 1.5-2m long.

Cant see me getting much done until after April, have anew decking to build and one of my sons purchased a Gemini rolling shell which muggens here will have to paint and get it going.

regards Bruce
 

geoffreywh

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it's not geared low enough!.No finesse of operation..why not get one of those electric servos ( R.C. Allen) and plant it in the tailplane..( I did) ...otherwise look for a geared right angled drive.(turn the handle and you get a push pull motion) ..an italian company used to make one. Ingegno I believe....They also make great wheels.........
 

gareth lacey

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Hi Sloper
Craig and I installed a Ray allen servo with trim indicator and dual control switches , the servo is very light and has a lot of pull and is very finite in controlling the trim flaps ( we install 100mmx600mm trim flaps into our elavator)
it is easily controlled and the total cost about $400 and a loom of 5 wires to the rear ,just my solution
cheeers Gareth
 

geoffreywh

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I've had my Allen servo for 7 years now, I got the up/down rocker and the positional led with it... works fine. Althought I like that manual red thing in the previous post. But then you have to have a push/ pull cable which spells disaster if I jams ( just like my original one..) .OK if you can get access...are you going to move the whole elevator asd a trim opr put a tab on the trailing edge.?... ( much simpler ) ......
 

geoffreywh

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I'm sorry Bruce. Excuse my ignorance. But, I don't see how your drawing of the trim works in conjunction with the elevator/joystick/ up-down action?
 

Virago

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I've fitted the RC Allen trim servo and moveable tab (complete with rocker switch and LED position indicator) to my Sierra project. I've flown a Cheetah with the exact same trim system and the fore/aft authority is excellent.
 

Old Koreelah

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Just read thru your entire thread, Bruce, Very impressed with your workmanship and innovations. I too have spent years stuck in the shed building and learned that it's easy to neglect the most important component of all: your flying skills. Are you keeping your hours up, especially in a similar aircraft?
 

Sloper

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Not flying as much as l want but am keeping my skills ok.
Next flight is a check flight.
Medical due next month and shhhh l am turning 50

regards Bruce
 

geoffreywh

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Bloody hell , That's why I don't believe I can build an aeroplane , There's just not enough time left (70 next birthday)
 

Deskpilot

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Bloody hell , That's why I don't believe I can build an aeroplane , There's just not enough time left (70 next birthday)
Of course there is. 5 years to build at the most, and at least 10 to enjoy your labours. At 72 I'm just waiting on my inheritance (mum's a healthy 96yo) and then it's all stops out to build one of my creations.