FIXACRASH
02-24-2010 | 11:05 PM
#4
RE: FIXACRASH
You're the Man, Crank. It is sad to watch the current generation of airplane buyers. They will throw away an airplane if it gets a hole in it's chinakote, let alone a broken stick of wood.
02-25-2010 | 02:58 AM
#5
RE: FIXACRASH
About repairing airplanes:
Back in 1970th in our RC club one guy learned to fly on a Goldberg Ranger 42 (foam plane). He crashed rather often but since it was a foam plane and rather light it was also rather easy to repair. I saw it dive straight down into the ground several times but was not that much damaged by his dive and crash exercises. Anyway I think he had it for a year and was probably reparied 20 times, at least. Then new people wanted to learn to fly RC and he sold the Ranger to another guy and he basically continued the pattern with dive and crashes while learning to fly. Before that Ranger 42 was ready for trash can the fuselage was probably made more by epoxy (repairs) then foam - that is a very good example of NOT throw away an airplane just because it had some crash and needed repairs.
/Bo
Back in 1970th in our RC club one guy learned to fly on a Goldberg Ranger 42 (foam plane). He crashed rather often but since it was a foam plane and rather light it was also rather easy to repair. I saw it dive straight down into the ground several times but was not that much damaged by his dive and crash exercises. Anyway I think he had it for a year and was probably reparied 20 times, at least. Then new people wanted to learn to fly RC and he sold the Ranger to another guy and he basically continued the pattern with dive and crashes while learning to fly. Before that Ranger 42 was ready for trash can the fuselage was probably made more by epoxy (repairs) then foam - that is a very good example of NOT throw away an airplane just because it had some crash and needed repairs.
/Bo
02-25-2010 | 04:19 AM
#6
Thread Starter
My Feedback: (15)
RE: FIXACRASH
Joefroo - Wing is fine, it hit on one wing tip, separated the seam that is butted up to the balsa, it is fiber-glas wing tip's. On these Intruder's, I join the wing halve's, glass the center section, just like a foam wing.
I had a write up on the first post, too much to read. This is Intruder #3. This fuselage broke at the exact place that Intruder #1 broke at the Apopka contest over two years ago. Downwind turn on final, cut throttle little too soon, it just fell out of the air, high speed stall? Fell nose down into a sand pit, you could almost mate these fuselage's together, both broke right in front of the dorsal fin. Many years ago, flying Goldberg Falcon 56's, a hard landing, the fuselage would crack right in front of the stab.
I will glass this area, monokote, will be like new. These WM Intruder's are stripped of the factory film, monokote applied.
Crank
I had a write up on the first post, too much to read. This is Intruder #3. This fuselage broke at the exact place that Intruder #1 broke at the Apopka contest over two years ago. Downwind turn on final, cut throttle little too soon, it just fell out of the air, high speed stall? Fell nose down into a sand pit, you could almost mate these fuselage's together, both broke right in front of the dorsal fin. Many years ago, flying Goldberg Falcon 56's, a hard landing, the fuselage would crack right in front of the stab.
I will glass this area, monokote, will be like new. These WM Intruder's are stripped of the factory film, monokote applied.
Crank
02-25-2010 | 06:25 AM
#7
RE: FIXACRASH
Gents, Crank
Same repair job, but with paint finish, FIXACRASH 2.
I also prefer wood as the construction material, easy to repair and if you are careful, without extra weight.
My Taurus fuse also was on a moment in two pieces after an low inverted dead stick. Picture 1
The drawing, picture 2, show how I repair: renew the destroyed section by replace new material. Make the glue joint surfaces with a ramp of about 1 : 10. When these glue joints are good you do not have to add extra reinforcements.
During repair I fix the front and backside exact “IN LINE and on RIGHT DISTANCE” on an extra structure of plywood..
The picture of the painting (3) of the repaired section is during last overhauling, only inside the fuselage the glue joints of the crash are still visible.
I only use the old school sheeting and finishing materials, so never glassing or film.
Last picture plane now, more than 5 years old.
Cees
Same repair job, but with paint finish, FIXACRASH 2.
I also prefer wood as the construction material, easy to repair and if you are careful, without extra weight.
My Taurus fuse also was on a moment in two pieces after an low inverted dead stick. Picture 1
The drawing, picture 2, show how I repair: renew the destroyed section by replace new material. Make the glue joint surfaces with a ramp of about 1 : 10. When these glue joints are good you do not have to add extra reinforcements.
During repair I fix the front and backside exact “IN LINE and on RIGHT DISTANCE” on an extra structure of plywood..
The picture of the painting (3) of the repaired section is during last overhauling, only inside the fuselage the glue joints of the crash are still visible.
I only use the old school sheeting and finishing materials, so never glassing or film.
Last picture plane now, more than 5 years old.
Cees
02-25-2010 | 06:46 AM
#8
Thread Starter
My Feedback: (15)
RE: FIXACRASH
Cees - Very nice repair. I am re-inforcing a little more back there, to just strengthen the area. May change the CG a little. I am using the OS61SF's in these plane's, little extra weight not hurt anything. What is the "cruise control" device you have there ?
Crank
Crank
02-25-2010 | 07:39 AM
#9
RE: FIXACRASH
Crank, your reinforcemnt is also a kind of modification, and on that weak place it sounds oké of cours. Especially to compensate the engine weight.
About the switch, I did show this picture in the past.
The switch detects g forces of moment of touch down. A second (back up) switch is mounted on one of the main legs of the landing gear.
On my transmitter I can select normal manual throttle control but also cruise control, an electronic device to give the Taurus more constant speed than constant speed by drag.
In fact one more step Ed Kazmirski could not make in the past!
When fly the Taurus with cruise control, the measured airspeed is maintained within a very narrow band of a few km/h, m/h. The controller manipulate the throttle servo for me. I only make the choice of the wanted airspeed. For example 50 % throttle stick position really is 75 km/h , 47 mph.
A third selection I can make is ; cruise control and switch over to normal manual throttle control on moment of touch down.
With this selection I land the Taurus, the cruise control does prevent any stall during flight and especially on final, the touchdown detection does switch over the cruise control to manual throttle control.
When the controller is not switched off it will speed up the revs of the engine to maintain the airspeed on ground level. Even in the strongest wind the wind speed on ground level is nearly 0 km/h (especially on grass) so the plane will reach the end of a small airfield within moments. Safety is also the reason of the two different switches, this action might not fail.
For touch and go the cruise control is continue on.
Cees
About the switch, I did show this picture in the past.
The switch detects g forces of moment of touch down. A second (back up) switch is mounted on one of the main legs of the landing gear.
On my transmitter I can select normal manual throttle control but also cruise control, an electronic device to give the Taurus more constant speed than constant speed by drag.
In fact one more step Ed Kazmirski could not make in the past!
When fly the Taurus with cruise control, the measured airspeed is maintained within a very narrow band of a few km/h, m/h. The controller manipulate the throttle servo for me. I only make the choice of the wanted airspeed. For example 50 % throttle stick position really is 75 km/h , 47 mph.
A third selection I can make is ; cruise control and switch over to normal manual throttle control on moment of touch down.
With this selection I land the Taurus, the cruise control does prevent any stall during flight and especially on final, the touchdown detection does switch over the cruise control to manual throttle control.
When the controller is not switched off it will speed up the revs of the engine to maintain the airspeed on ground level. Even in the strongest wind the wind speed on ground level is nearly 0 km/h (especially on grass) so the plane will reach the end of a small airfield within moments. Safety is also the reason of the two different switches, this action might not fail.
For touch and go the cruise control is continue on.
Cees
