1/5.3 Horten 229
03-05-2013, 02:51 PM
#26
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RE: 1/5.3 Horten 229
ORIGINAL: invertmast
I am working on getting a dealer for these based in Europe to possibly make it available to you guys on the other side of the pond. Ill update the thread with more info on that as i get it.
I am working on getting a dealer for these based in Europe to possibly make it available to you guys on the other side of the pond. Ill update the thread with more info on that as i get it.
[8D]
04-16-2013, 07:07 PM
#30
RE: 1/5.3 Horten 229
Well after a long and trying process... including 2 flights and 2 crash's, the second completely destroying the outer wing panel and damaging the center section. New wing panels were built over the past 4 1/2 weeks, the center section repaired and everything repainted an re-installed, we went out sunday for the third attempt at a successful takeoff and landing. That ended during the abort of the take-off roll when there wasn't enough up elevator to rotate and a damaged retract trunnion. All that was fixed over Sunday and monday evening and today we went back out for another attempt.
Today we had SUCCESS! Its still a bit nose heavy and there are a few bugs to work out, but other than that, it flew extremely well and came down and home in one piece! Very relieved and happy at this point as this has been a very frustrating project! One down, one to go!
The bugs:
The nose gear didn't get all the way up in the well, which caused a gear door hinge to crack when the doors closed... gotta fix this again. Its odd though, as today was the first time the nose gear has never gone up completely, i've got to look into seeing if i can program the door sequencer delay to a longer delay time.
The second and last bug, is the lack of steering. With 19lbs of weight on the nose gear and a 8711 servo for steering (yes an 8711!) the model still has very limited steering on the ground. Its currently got a 4-40 pull-pull setup and I know the cables have stretched since install.
Anyone have any suggestions on a pull-pull arrangement that won't stretch?
Here's a video, I forgot to turn the auto-focus off so you'll have to excuse the lack of model in the screen at times, we didn't have any other camera's to use as we decided to pick a day where the local crowd wouldn't be at the field asking questions.
Video should be up in about 45 minutes
http://youtu.be/qKA_6zhIKz0
Today we had SUCCESS! Its still a bit nose heavy and there are a few bugs to work out, but other than that, it flew extremely well and came down and home in one piece! Very relieved and happy at this point as this has been a very frustrating project! One down, one to go!
The bugs:
The nose gear didn't get all the way up in the well, which caused a gear door hinge to crack when the doors closed... gotta fix this again. Its odd though, as today was the first time the nose gear has never gone up completely, i've got to look into seeing if i can program the door sequencer delay to a longer delay time.
The second and last bug, is the lack of steering. With 19lbs of weight on the nose gear and a 8711 servo for steering (yes an 8711!) the model still has very limited steering on the ground. Its currently got a 4-40 pull-pull setup and I know the cables have stretched since install.
Anyone have any suggestions on a pull-pull arrangement that won't stretch?
Here's a video, I forgot to turn the auto-focus off so you'll have to excuse the lack of model in the screen at times, we didn't have any other camera's to use as we decided to pick a day where the local crowd wouldn't be at the field asking questions.
Video should be up in about 45 minutes
http://youtu.be/qKA_6zhIKz0
04-16-2013, 11:42 PM
#33
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RE: 1/5.3 Horten 229
Thomas
Well done in persevering, yes it is a truly rewarding plane to see in the air. The plane flies well and you should only need minor tinkering to get the best out of it. I just checked the steering servo I am using. It is a Hitec Hs645 with 9.6Kg.cm torque. This compares to your 25Kg +!!
My plane is much heavier than yours and is larger, however the difference must be in the nose leg length. If the leg is too short then too much of the weight is taken through the nose leg.
My servo is the same one I originally fitted and has not been changed. The steering is direct on the nose leg. The only issue I have had is breaking the brass pin that secures the servo arm to the nose leg. I have since made up mild steel ones.
John
Well done in persevering, yes it is a truly rewarding plane to see in the air. The plane flies well and you should only need minor tinkering to get the best out of it. I just checked the steering servo I am using. It is a Hitec Hs645 with 9.6Kg.cm torque. This compares to your 25Kg +!!
My plane is much heavier than yours and is larger, however the difference must be in the nose leg length. If the leg is too short then too much of the weight is taken through the nose leg.
My servo is the same one I originally fitted and has not been changed. The steering is direct on the nose leg. The only issue I have had is breaking the brass pin that secures the servo arm to the nose leg. I have since made up mild steel ones.
John
04-18-2013, 03:20 AM
#37
RE: 1/5.3 Horten 229
ORIGINAL: rcjets_63
Awesome accomplishment Thomas, congrats!
No time to rest on your laurels, get back to work on the Tomcat!
Regards,
Jim
Awesome accomplishment Thomas, congrats!
No time to rest on your laurels, get back to work on the Tomcat!
Regards,
Jim
Thanks Jim!
Im out or town all next week for work (yay! Makin money! Lol) but when i return i plan to start getting all the molds prepped for layups. The F14 landing gear and layup supplies are priority for this summer, along with getting the paint to finish my geebee.
If i had some investors, i could progress on the Tomcat quicker
04-18-2013, 09:51 AM
#40
RE: 1/5.3 Horten 229
ORIGINAL: invertmast
Do you man on the horten? No its fixes lemgth
On the F-14, yes it will
You could probably fly the horten on P20,s as long as they make atleast 6lbs of thrust each.
Do you man on the horten? No its fixes lemgth
On the F-14, yes it will
You could probably fly the horten on P20,s as long as they make atleast 6lbs of thrust each.
sorry for my bad english
04-18-2013, 10:05 AM
#41
RE: 1/5.3 Horten 229
There are a few guys in the UK/germany that have utilized a nose strut that will compress more on landing to help the model "stick" more on landing, but I believe they eventually quit using it.
My model would of bounced slightly less,but with as much issues i've had with it and the high winds, i decided to come in much faster than necessary in case I had to do a go-around.. this thing has only flown three times and crashed twice! Hopefully the one landing per takeoff will stay consistent now
My model would of bounced slightly less,but with as much issues i've had with it and the high winds, i decided to come in much faster than necessary in case I had to do a go-around.. this thing has only flown three times and crashed twice! Hopefully the one landing per takeoff will stay consistent now
04-18-2013, 02:29 PM
#42
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RE: 1/5.3 Horten 229
I've noticed on big Ho IX i've seen in flight (included the big UK one kero powered) that the scale incidence is far too high for the model. On the big one, a normal take off is speed up until the rear gear fly and Ho IX sits only on its front legs [:-][:@][:'(], then pull-up and fly ! And on landing, you can never put the nose as high as it should be to ensure rear gear landing first... So its boucing everytime.[:@][:'(]
I've seen your small front leg, it looks good for landing but it seems you need a lot of up elevator to take off...
Great job... For this size maybe twin P20 is a bit small, but should be really scale powered. Maybe twin Wren44 should be great...
I've seen your small front leg, it looks good for landing but it seems you need a lot of up elevator to take off...
Great job... For this size maybe twin P20 is a bit small, but should be really scale powered. Maybe twin Wren44 should be great...
04-18-2013, 02:36 PM
#43
RE: 1/5.3 Horten 229
It needed allot of up elevator as it is still really nose heavy. The cg was calculated at 19" aft of the nose, but i believe even that is still conservative. I plan to remove nose weight until i like the feel of it in flight and keep it there.
04-27-2013, 12:38 PM
#44
RE: 1/5.3 Horten 229
Flights #4 and 5 were completed successfully today. I removed 2oz of lead for flight #4. Other than a gear door coming off in flight due to a broken hinge (still not sure why the hinge was broken, as the nose gear was fully up when the doors close... weird). Otherwise, not allot of change noticed with the nose weight removed. I did replace the steering servo/battery mount plate with a 1/4" aircraft ply plate. Ground steering is greatly improved and its issues finally (hopefully) fixed..
Flight #5 involved remove 3oz of weight from the nose. I feel this made a much better improvement in handling than previous weight removal's. It got off the ground quicker, and elevator authority felt better during the landing flare. This could be wrong, as there was a significant headwind as well.
Here's flight #4's video.. still a bit shaky, but Tom's getting better
http://www.youtube.com/watch?v=5oekW...ature=youtu.be
Flight #5 involved remove 3oz of weight from the nose. I feel this made a much better improvement in handling than previous weight removal's. It got off the ground quicker, and elevator authority felt better during the landing flare. This could be wrong, as there was a significant headwind as well.
Here's flight #4's video.. still a bit shaky, but Tom's getting better
http://www.youtube.com/watch?v=5oekW...ature=youtu.be
04-27-2013, 05:30 PM
#50
RE: 1/5.3 Horten 229
ORIGINAL: hooker53
I could see the Diff the Sec you hit the throttle on that take-off with the lead out. Looking good Thomas.
I can see Two new, matched Kingtech K35's in your future just sure as the world. Ha. Ha.
I could see the Diff the Sec you hit the throttle on that take-off with the lead out. Looking good Thomas.
I can see Two new, matched Kingtech K35's in your future just sure as the world. Ha. Ha.