ZIROLI F9F PANTHER BUILD
10-29-2014, 08:50 AM
#328
Got a couple flights in at Rally of the Giants at Mac's place.
It took a few re-starts to get the turbine started. It sounds like the rubber O ring on the electric starter needs to be replaced. Not sure if I'll try fixing it or sending the turbine in for the fix.
11-17-2014, 06:38 AM
#329
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I have about 10 flights on my Panther and really enjoy flying it. One issue that I am having is it tends to porpus on me on landing. I have tried different landing speeds and flap settings, but still seem to have issues from time to time. I have thought about taking a coil or so out of the gear springs and adding crow breaking as well. Any suggestion would be greatly appreciated.
Thanks,
Mark
Thanks,
Mark
11-17-2014, 07:08 AM
#330
Yep, I had a little of that on my first landing. I use lots of flap (45 degree, like on my prop warbirds) and, if I leave the elevator alone and just use gravity to bring her down, that seems to work pretty well.
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Looks like Christmas morning in the movie 'Christmas story'.
First snow fall of the year. About 3" of sticky snow so it clung to everything.
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Looks like Christmas morning in the movie 'Christmas story'.
First snow fall of the year. About 3" of sticky snow so it clung to everything.
11-17-2014, 10:50 AM
#331
Mark, Do you have any video of your Panther flights posted anywhere? I am not finished with my Ziroli Panther yet but my BVM Bobcat will do the bunny hop on landing also if you do not land it correctly.
Typically my landing technique is as follows: On your landing approach keep in mind that elevator controls airspeed and throttle controls altitude. I slow the plane down and gradually apply elevator, once it is on final and has the proper attitude I adjust the altitude with throttle, this way I can always land at my feet directly in front of me or right on the #'s. At no time though during the approach is my turbine at idle. I varies with each jet and engine set up, for instance my Yellow F-15 comes in at half throttle with flaps and air brake. Any other approach and it's hit or miss, you see this all the time in video's and at the field. People dive for the runway with the throttle at idle and hope they hit the elevator at the right moment usually landing long and too hot.
Good luck and keep us posted with what you find and learn about the Z Panther.
Typically my landing technique is as follows: On your landing approach keep in mind that elevator controls airspeed and throttle controls altitude. I slow the plane down and gradually apply elevator, once it is on final and has the proper attitude I adjust the altitude with throttle, this way I can always land at my feet directly in front of me or right on the #'s. At no time though during the approach is my turbine at idle. I varies with each jet and engine set up, for instance my Yellow F-15 comes in at half throttle with flaps and air brake. Any other approach and it's hit or miss, you see this all the time in video's and at the field. People dive for the runway with the throttle at idle and hope they hit the elevator at the right moment usually landing long and too hot.
Good luck and keep us posted with what you find and learn about the Z Panther.
11-20-2014, 10:13 AM
#332
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Thanks for the input! I do find that I have better luck with lower elevator throws on landing (less opportunity to over correct). I do need to spend some time dialing in elevator/throttle settings on landing, but unfortunately our flying season is quickly coming to an end and will have to wait until next spring. Building (& fixing) season has begun!
Mark
Mark
11-20-2014, 02:13 PM
#333
You're welcome Mark! One thing that will make them bounce for sure is coming in too fast. What I do is practice whenever I can on Real Flight, I will even get a high wing trainer and just practice using the left stick, using throttle to control altitude. Once my approach is set, elevator input is not really necessary, I flair with throttle most of the time. Even my Giant Spitfire, I'm at full up elevator 5 feet over the runway and on the throttle for the flair! Generally my Bobcat is at full up elevator at touchdown also, sensitivity on the elevator could mean you are still carrying too much speed. Most Youtube video's of maiden flights rarely show the modeler practicing slow flight, this is the first thing I do after trimming, it's the only way to know what to expect on landing and most of the time if it's a good bird will calm your nerves on landing.
Can't wait to get my panther going, hope it will be soon!
Luke
Can't wait to get my panther going, hope it will be soon!
Luke
11-21-2014, 02:10 AM
#334
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Luke, on those YouTube maidens there is no time to prat ice slow flight as they are to busy ringing the plane out with full power loops and sharp pull outs after full power dives. 
05-29-2015, 04:20 PM
#335
PM:
Last October, I sent the jecat P70 turbine to Carlos at (http://www.rtiturbines.com/index.asp) to fix the O ring and check out the bearings. He also updated the software.
After installing the turbine and ECU, the engine wouldn't start: it took a few minutes to realize that for Carlos to test the engine, he had to bind it to his transmitter and set the fail safe. Once I performed the fail safe procedure, she started up at 38K/122K rpm's.
Checked all the surfaces and servos. All's good except the brakes. I've got a double tray and the brake servo in on the bottom tray (bummer).
I'm on my last bottle of old coleman powermax (no longer produced) and had to buy bernsomatic and the nipple is different so I'll have to figure out a mod for that.
Last October, I sent the jecat P70 turbine to Carlos at (http://www.rtiturbines.com/index.asp) to fix the O ring and check out the bearings. He also updated the software.
After installing the turbine and ECU, the engine wouldn't start: it took a few minutes to realize that for Carlos to test the engine, he had to bind it to his transmitter and set the fail safe. Once I performed the fail safe procedure, she started up at 38K/122K rpm's.
Checked all the surfaces and servos. All's good except the brakes. I've got a double tray and the brake servo in on the bottom tray (bummer).
I'm on my last bottle of old coleman powermax (no longer produced) and had to buy bernsomatic and the nipple is different so I'll have to figure out a mod for that.
06-16-2015, 04:06 PM
#337
She got two flights at warbirds over Georgia. 1400' long runway makes for easy landings!
The LE of the vertical fin got some hanger rash on the way home.
Fortunately, the damage was all under the aluminum tape so no yellow painting was needed.
Some 'easy sand' and new tape fixed her up.
The LE of the vertical fin got some hanger rash on the way home.
Fortunately, the damage was all under the aluminum tape so no yellow painting was needed.
Some 'easy sand' and new tape fixed her up.
06-19-2015, 07:30 AM
#338
More PM:
While at Mac's, the ECU said low battery, and after charging, it only said 400 ma input so I figured it was about to die. Got a new 6 cell at Batteries plus.
Also, the air was slowly escaping. I find it easiest to just put a medical clamp on the lines and keep moving the clamp until I find the leak (pressure valve drops). Since I've never had a robart quick connect leak, I just cut the line, install a quick link and put in some BVM thin lube oil ( I shy away from removing the lines from the T's as I fear scoring the sides while trying to remove the air lines). In this case, the main retract O rings must have been dry.
While at Mac's, the ECU said low battery, and after charging, it only said 400 ma input so I figured it was about to die. Got a new 6 cell at Batteries plus.
Also, the air was slowly escaping. I find it easiest to just put a medical clamp on the lines and keep moving the clamp until I find the leak (pressure valve drops). Since I've never had a robart quick connect leak, I just cut the line, install a quick link and put in some BVM thin lube oil ( I shy away from removing the lines from the T's as I fear scoring the sides while trying to remove the air lines). In this case, the main retract O rings must have been dry.
08-21-2015, 01:33 PM
#339
Got 3 flights in at Fond du Lac, last week.
Wing bags/tail feather protectors.
I cut open the aluminum insulation (from home depot) and lined the interior with felt from Joanne's fabric store using 3M spray adhesive.
PM:
Got some sever hanger rash to the vertical fin and one main wood mount broke free to the outer rib.
I wood mount was an easy repair using epoxy.
After masking off the vertical fin, the area was sanded smooth, lots of thin CA was used to secure the sheeting and some easy sand used to fill in the blemishes.
Wing bags/tail feather protectors.
I cut open the aluminum insulation (from home depot) and lined the interior with felt from Joanne's fabric store using 3M spray adhesive.
PM:
Got some sever hanger rash to the vertical fin and one main wood mount broke free to the outer rib.
I wood mount was an easy repair using epoxy.
After masking off the vertical fin, the area was sanded smooth, lots of thin CA was used to secure the sheeting and some easy sand used to fill in the blemishes.
Last edited by samparfitt; 08-21-2015 at 01:36 PM.
08-23-2015, 02:32 PM
#340
Vertical fin repair (cont)
After two applications of easy sand, an air brush was used to add some 2 part primer and then the yellow was added.
A white color primer would have been better for the yellow.
Last item is to add the aluminum tape along the vertical fin's LE.
The rudder was easy to remove for the repairs since robart's pocket hinges were used.
After two applications of easy sand, an air brush was used to add some 2 part primer and then the yellow was added.
A white color primer would have been better for the yellow.
Last item is to add the aluminum tape along the vertical fin's LE.
The rudder was easy to remove for the repairs since robart's pocket hinges were used.
Last edited by samparfitt; 08-23-2015 at 02:35 PM.
10-20-2015, 04:34 PM
#341
Finally got her done, man this plane is an awesome flyer! I can land it so soft you can't tell it's on the ground, reminds me of my old Kaos!
Have 4 flight on it now, looking forward to bringing it to Jetoberfest in November?
at Bomber field Nov. 7. I have the cockpit to install and it'll be ready for prime time! Power is a Kingtech K80 and it weighs 24lbs, dropped my bombs on the second flight and lost them in the grass!
It's all painted finish, Vikie at get stencils helped me out and the nomenclature is from Taylor Made Decals in Germany, my Panther now says under the cockpit, "REFER TO THE ERECTION MANUAL" on the red placard!
Luke
Have 4 flight on it now, looking forward to bringing it to Jetoberfest in November?
at Bomber field Nov. 7. I have the cockpit to install and it'll be ready for prime time! Power is a Kingtech K80 and it weighs 24lbs, dropped my bombs on the second flight and lost them in the grass! It's all painted finish, Vikie at get stencils helped me out and the nomenclature is from Taylor Made Decals in Germany, my Panther now says under the cockpit, "REFER TO THE ERECTION MANUAL" on the red placard!
Luke
09-09-2022, 10:36 PM
#346
Join Date: Mar 2006
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Although this is built up from Ziroli plans and wood kit was purchased, I think, from laser design, the fuse has been made of fiber epoxy, but formers should be in the same place.
Thank you
Joe
