Composite ARF Tucano Build
09-09-2013, 11:46 PM
#355
Why is the cockpit melting ? Are you sure you don't have some hot air from the turbine going into the fuse ? Make sure that the air intake tube is completely sealed. If it's not completely sealed, you turbine could also be getting some hot air and making it run hotter.
11-11-2013, 02:49 AM
#359
Bart:
Very nice pictures....
Are you flying the Tucano with the recommended factory CG or you move it a little bit forward ? My first Tucano was flown with the factory recommended CG and it always felt like the tail was heavy. On my second Tucano I followed the recommendation of Bevar and added some additional weight in the front of the plane...... now it is a completely different animal and flies great. All maneuvers look more clean.
Very nice pictures....
Are you flying the Tucano with the recommended factory CG or you move it a little bit forward ? My first Tucano was flown with the factory recommended CG and it always felt like the tail was heavy. On my second Tucano I followed the recommendation of Bevar and added some additional weight in the front of the plane...... now it is a completely different animal and flies great. All maneuvers look more clean.
11-11-2013, 05:11 AM
#360
Senior Member
Join Date: Mar 2006
Location: Tessenderlo, BELGIUM
Posts: 278
Likes: 0
Received 0 Likes
on
0 Posts
Hi Gonzalo,
I never got around to measuring where the exact CG is. I bought the Tucano from a clubmember who got tired of flying it because he had various issues with fuel and air leaks.
So I stripped it, cleaned up the install and moved all the heavy stuff forward as recommended here in the thread. It has about 70 flights this season and I'm pretty happy how it flies. In landing configuration it is still a little tail heavy but it does not have any bad habits. It is amazing how slow it can land. Inverted flight is neutral, no need to push down elevator. The hardest part in flying this airplane is getting a consistent roll rate in a slow roll because of the rudder coupling. Are you experiencing this same thing?
Prop is a Biela 24x14, I prefer it to a 24x12, It gives me more consistent speed through manouvres and less noise.
Regards, Bart.
I never got around to measuring where the exact CG is. I bought the Tucano from a clubmember who got tired of flying it because he had various issues with fuel and air leaks.
So I stripped it, cleaned up the install and moved all the heavy stuff forward as recommended here in the thread. It has about 70 flights this season and I'm pretty happy how it flies. In landing configuration it is still a little tail heavy but it does not have any bad habits. It is amazing how slow it can land. Inverted flight is neutral, no need to push down elevator. The hardest part in flying this airplane is getting a consistent roll rate in a slow roll because of the rudder coupling. Are you experiencing this same thing?
Prop is a Biela 24x14, I prefer it to a 24x12, It gives me more consistent speed through manouvres and less noise.
Regards, Bart.
11-11-2013, 06:25 AM
#361
Bart:
I'm also using the Biela 24 x 12 with good results. I get at least 500 more rpm's and better speed which helps with the maneuvers. When I tried the 24 x 14, the plane felt very heavy and it didn't have enough power to have good verticals.
The Centre of Gravity should be set at 12mm (1/2”) in front of the spanwise panel-line at the tip of the wing. This is the same as 75mm (3”) back from the leading edge at the wing tip.
Bevars recommendation was to use 12 oz of lead in the nose of the plain but I think I just used 8 oz. This really makes a difference in the plane.
I haven't noticed the rudder coupling problem maybe because I don't roll the plane too slowly. Also a more forward CG and aileron differential could be helping in my case..... and when I connect the iGyro, for sure I can't notice it
I'm also using the Biela 24 x 12 with good results. I get at least 500 more rpm's and better speed which helps with the maneuvers. When I tried the 24 x 14, the plane felt very heavy and it didn't have enough power to have good verticals.
The Centre of Gravity should be set at 12mm (1/2”) in front of the spanwise panel-line at the tip of the wing. This is the same as 75mm (3”) back from the leading edge at the wing tip.
Bevars recommendation was to use 12 oz of lead in the nose of the plain but I think I just used 8 oz. This really makes a difference in the plane.
I haven't noticed the rudder coupling problem maybe because I don't roll the plane too slowly. Also a more forward CG and aileron differential could be helping in my case..... and when I connect the iGyro, for sure I can't notice it
Last edited by Gonzalo38; 11-11-2013 at 06:28 AM.
11-11-2013, 11:03 AM
#362
I guess Andreas came up with the original balance point as he likes a very neutral feel. The one I set up locally also felt very sensitive, I added a little more weight and increased the down elevator expo 10% over up. The rudder is powerful, so again I have 40% expo and it slow rolls nicely.
24 x 12 Biela for us, but its an early SPT-5
Dave
24 x 12 Biela for us, but its an early SPT-5
Dave
11-11-2013, 11:27 AM
#363
Senior Member
Join Date: Mar 2006
Location: Tessenderlo, BELGIUM
Posts: 278
Likes: 0
Received 0 Likes
on
0 Posts
I have one of the early ones too, is there a difference in power in comparisson with a V3?
Seems i'm the only one who favors the 24x14, I find it gives me a more linear throttle range. 50-75% throttle for aerobatic manouvres, only full on long uplines or giant loops. I fly more of a pattern routine, not really into full tilt ballistic flying with supersonic propellor tips.
Regards, Bart.
Seems i'm the only one who favors the 24x14, I find it gives me a more linear throttle range. 50-75% throttle for aerobatic manouvres, only full on long uplines or giant loops. I fly more of a pattern routine, not really into full tilt ballistic flying with supersonic propellor tips.
Regards, Bart.
11-11-2013, 11:45 AM
#364
I have one of the early ones too, is there a difference in power in comparisson with a V3?
Seems i'm the only one who favors the 24x14, I find it gives me a more linear throttle range. 50-75% throttle for aerobatic manouvres, only full on long uplines or giant loops. I fly more of a pattern routine, not really into full tilt ballistic flying with supersonic propellor tips.
Regards, Bart.
Seems i'm the only one who favors the 24x14, I find it gives me a more linear throttle range. 50-75% throttle for aerobatic manouvres, only full on long uplines or giant loops. I fly more of a pattern routine, not really into full tilt ballistic flying with supersonic propellor tips.
Regards, Bart.
We don't fly howl mode either! Constant speed manoeuvres throughout.
To answer Paul D it comes pilots, seats and dash, you use the CARF tub to hang it all together....its a chunk of cash and needs a fair amount of work.
11-11-2013, 01:12 PM
#365
Join Date: Jun 2006
Location: Gold Coast, Queensland, AUSTRALIA
Posts: 1,469
Received 26 Likes
on
24 Posts
Bart:
I'm also using the Biela 24 x 12 with good results. I get at least 500 more rpm's and better speed which helps with the maneuvers. When I tried the 24 x 14, the plane felt very heavy and it didn't have enough power to have good verticals.
The Centre of Gravity should be set at 12mm (1/2”) in front of the spanwise panel-line at the tip of the wing. This is the same as 75mm (3”) back from the leading edge at the wing tip.
Bevars recommendation was to use 12 oz of lead in the nose of the plain but I think I just used 8 oz. This really makes a difference in the plane.
I haven't noticed the rudder coupling problem maybe because I don't roll the plane too slowly. Also a more forward CG and aileron differential could be helping in my case..... and when I connect the iGyro, for sure I can't notice it
I'm also using the Biela 24 x 12 with good results. I get at least 500 more rpm's and better speed which helps with the maneuvers. When I tried the 24 x 14, the plane felt very heavy and it didn't have enough power to have good verticals.
The Centre of Gravity should be set at 12mm (1/2”) in front of the spanwise panel-line at the tip of the wing. This is the same as 75mm (3”) back from the leading edge at the wing tip.
Bevars recommendation was to use 12 oz of lead in the nose of the plain but I think I just used 8 oz. This really makes a difference in the plane.
I haven't noticed the rudder coupling problem maybe because I don't roll the plane too slowly. Also a more forward CG and aileron differential could be helping in my case..... and when I connect the iGyro, for sure I can't notice it
Cheers,
Jan
11-23-2013, 08:46 AM
#366
Join Date: Aug 2007
Location: , FRANCE, METROPOLITAN
Posts: 238
Likes: 0
Received 0 Likes
on
0 Posts
Hello Guys.
I'm painting my Carf tucano and I have a little problem about the nomenclature. I have the nomenclature ready to paint but I need the location on the plane.
Anybody have a drawing of the location of the nomenclature of the Tucano?
Thanks a lot.
bets regards.
Fifou
I'm painting my Carf tucano and I have a little problem about the nomenclature. I have the nomenclature ready to paint but I need the location on the plane.
Anybody have a drawing of the location of the nomenclature of the Tucano?
Thanks a lot.
bets regards.
Fifou
11-23-2013, 06:13 PM
#367
Fifou:
I guess it depends of the schem you are choosing. Have you check www.airliners.net for pictures of different Tucanos ?
Mine is also waiting for the final markings that are going to be made by Rall from Tailormade Decals.
I guess it depends of the schem you are choosing. Have you check www.airliners.net for pictures of different Tucanos ?
Mine is also waiting for the final markings that are going to be made by Rall from Tailormade Decals.
11-26-2013, 02:09 PM
#370
Hi Guys
I like to buy one of these Tucanos but, it will be for flying it off a medium to rough grass field and I have heard that the turbine would need to go back for check-up / service if there is smallest prop strike. For those of you that have been flying this plane for a while, could you please let me know the real fact about this issue. I would really appreciate it.
Thanks again.
Behzad
I like to buy one of these Tucanos but, it will be for flying it off a medium to rough grass field and I have heard that the turbine would need to go back for check-up / service if there is smallest prop strike. For those of you that have been flying this plane for a while, could you please let me know the real fact about this issue. I would really appreciate it.
Thanks again.
Behzad
11-26-2013, 03:53 PM
#371
Behzad:
I've never flown from a grass field with one of my Turboprops, but I do know that the gear case is the weak link in these turbines. Not sure if a prop strike when you are in idle (99% of the time you will not have power applied when you are touching the ground) can really damage the gear case but just because of precaution I would send it to service.
Having said that, the prop has good clearance so you would have to have a really bad landing for the prop to be able to strike the ground. If it cuts a little of grass with out touching a solid surface it shouldn't be a problem
Maybe other people with experience in grass fields will chime in.
If you like the turbo props, have you ever looked at the Comp Arf Marchetti ? I'm in love with that plane. It just flies better than the Tucano if you ask me, plus the landing gear is better suited for a grass strip. Also the nose seats higher and that gives the prop more clearance. It's a plane that can be flown fast but at the same time, in landings you can really slow it down.
I've never flown from a grass field with one of my Turboprops, but I do know that the gear case is the weak link in these turbines. Not sure if a prop strike when you are in idle (99% of the time you will not have power applied when you are touching the ground) can really damage the gear case but just because of precaution I would send it to service.
Having said that, the prop has good clearance so you would have to have a really bad landing for the prop to be able to strike the ground. If it cuts a little of grass with out touching a solid surface it shouldn't be a problem
Maybe other people with experience in grass fields will chime in.
If you like the turbo props, have you ever looked at the Comp Arf Marchetti ? I'm in love with that plane. It just flies better than the Tucano if you ask me, plus the landing gear is better suited for a grass strip. Also the nose seats higher and that gives the prop more clearance. It's a plane that can be flown fast but at the same time, in landings you can really slow it down.
11-26-2013, 04:06 PM
#372
Behzad:
On Saturday I was flying both planes at my club and the one I flew the most was the Marchetti. The quality of the video I have sucks.... but at least you can get an idea of how the marchetti behaves. It was extremely windy....
http://youtu.be/MlB59BR16_k http://youtu.be/aP6oSTT4NBg http://youtu.be/S9Cu0hJLnyQ
On Saturday I was flying both planes at my club and the one I flew the most was the Marchetti. The quality of the video I have sucks.... but at least you can get an idea of how the marchetti behaves. It was extremely windy....
http://youtu.be/MlB59BR16_k http://youtu.be/aP6oSTT4NBg http://youtu.be/S9Cu0hJLnyQ
11-26-2013, 05:24 PM
#373
Hi Gonzalo
thank you for the reply. I have been also looking at the Marchetti but I was thinking of putting a Da 120 or a 3w 4 cylinder 120. From the measurements, it looks like that 3w will be bout 2" too long if I leave the firewall the way it is. But it looks like it can be cut and shortened to fit the 4 Cylinder. But, I think you are recommending the Turbo Marchetti. Correct ?
About the the grass field, I am not concerned about landing. The problem normally is on takeoff and when the plane picks speed. We are flying turbines there as well but they have to be over powered and light so they get and go quick. Otherwise, they bounce hard.
Thanks again.
Behzad
thank you for the reply. I have been also looking at the Marchetti but I was thinking of putting a Da 120 or a 3w 4 cylinder 120. From the measurements, it looks like that 3w will be bout 2" too long if I leave the firewall the way it is. But it looks like it can be cut and shortened to fit the 4 Cylinder. But, I think you are recommending the Turbo Marchetti. Correct ?
About the the grass field, I am not concerned about landing. The problem normally is on takeoff and when the plane picks speed. We are flying turbines there as well but they have to be over powered and light so they get and go quick. Otherwise, they bounce hard.
Thanks again.
Behzad