AlexM

Thanks guys!
 
 
I think you are right, if everything else fails, a metal landing gear would be a reasonable investition. Meanwhile, I provisionally pluged the steel-rod-enforced legs and the small support struts into the the designated openings in the wheel wells for a first test. And right now, it looks promising. Not bending visible
 

 

 
I'll leave it like this for a while to see if it stays stable.
 
Cheers
ALex

Hello there, again little progress.
One thing that causes headache is the main landing gear, which is angeled forward in a scary way, while the whole model is rather heavy, not least because of the counterweights to prevent the notorious tail-sitting. The green one, which is printed as one single part, is in no way strong enough, will bend and propably breake. I'm thinking about metal casting by a goldsmith, but I guess this wouldn't be cheap. So right now, I'll try a multi-piece landing gear with 2mm steel rod enforcement. The upper part of the fork now consists of two halves which cover a bent steel rod.  There are still weak spots, but maybe it works. Whish me luck 
 

 

 

 
Cheers
Alex

Thanks, Jason!
 
 
 
I regarded a 2mm hard spring steel rod as necassary.  But I was in no way able to bend one single rod  tight and precise enough at the three 90 degree corners.
Now thinking about it, I guess a combination of steel tubing with 2mm inner diameter as connector, 2mm spring steel rod sections for the straight areas, and some more easily bendable 2mm rods (brass?) for the corners, all jacketed with printed resin halves, could work and would be much stronger than my recent effort.
 
Let's see, maybe I'll give this a try. Until now, the model stands stable on its legs..
 
Cheers
Alex
 

Thanks, Mark!
 
I know what you mean. I printed the parts with a resin that is advertised to be very strong. After all parts were glued together, I put some more liquid resin at the seams and put it under UV light to cure. Now, It's more or less one single resin part with steel-rods within. I'll watch it for some time and hope that is stays stable, especially at the weak point you mentioned.
 
One nice thing is that the balance can now be checked to prevent tail sitting. Until now, the necessary counterweight at the area forward of the main landing gear has only been roughly calculated. Now, with most weight-relevant parts provisionally attached, it already stands like it should. And the resin engines and the forward landing gear isn't attached yet, so I think at least regarding that aspect I'm safe. The weight on the nose landing gear will be minimal, so a fully printed nose gear without metal-rod-enforcement should be fully sufficient.
 

 
Cheers
Alex

Thanks guys!
 
 
I think you are right, if everything else fails, a metal landing gear would be a reasonable investition. Meanwhile, I provisionally pluged the steel-rod-enforced legs and the small support struts into the the designated openings in the wheel wells for a first test. And right now, it looks promising. Not bending visible
 

 

 
I'll leave it like this for a while to see if it stays stable.
 
Cheers
ALex

Thanks, Mark!
 
I know what you mean. I printed the parts with a resin that is advertised to be very strong. After all parts were glued together, I put some more liquid resin at the seams and put it under UV light to cure. Now, It's more or less one single resin part with steel-rods within. I'll watch it for some time and hope that is stays stable, especially at the weak point you mentioned.
 
One nice thing is that the balance can now be checked to prevent tail sitting. Until now, the necessary counterweight at the area forward of the main landing gear has only been roughly calculated. Now, with most weight-relevant parts provisionally attached, it already stands like it should. And the resin engines and the forward landing gear isn't attached yet, so I think at least regarding that aspect I'm safe. The weight on the nose landing gear will be minimal, so a fully printed nose gear without metal-rod-enforcement should be fully sufficient.
 

 
Cheers
Alex

Thanks, Jason!
 
 
 
I regarded a 2mm hard spring steel rod as necassary.  But I was in no way able to bend one single rod  tight and precise enough at the three 90 degree corners.
Now thinking about it, I guess a combination of steel tubing with 2mm inner diameter as connector, 2mm spring steel rod sections for the straight areas, and some more easily bendable 2mm rods (brass?) for the corners, all jacketed with printed resin halves, could work and would be much stronger than my recent effort.
 
Let's see, maybe I'll give this a try. Until now, the model stands stable on its legs..
 
Cheers
Alex
 

Thanks, Mark!
 
I know what you mean. I printed the parts with a resin that is advertised to be very strong. After all parts were glued together, I put some more liquid resin at the seams and put it under UV light to cure. Now, It's more or less one single resin part with steel-rods within. I'll watch it for some time and hope that is stays stable, especially at the weak point you mentioned.
 
One nice thing is that the balance can now be checked to prevent tail sitting. Until now, the necessary counterweight at the area forward of the main landing gear has only been roughly calculated. Now, with most weight-relevant parts provisionally attached, it already stands like it should. And the resin engines and the forward landing gear isn't attached yet, so I think at least regarding that aspect I'm safe. The weight on the nose landing gear will be minimal, so a fully printed nose gear without metal-rod-enforcement should be fully sufficient.
 

 
Cheers
Alex

Thanks guys!
 
 
I think you are right, if everything else fails, a metal landing gear would be a reasonable investition. Meanwhile, I provisionally pluged the steel-rod-enforced legs and the small support struts into the the designated openings in the wheel wells for a first test. And right now, it looks promising. Not bending visible
 

 

 
I'll leave it like this for a while to see if it stays stable.
 
Cheers
ALex

Hello there, again little progress.
One thing that causes headache is the main landing gear, which is angeled forward in a scary way, while the whole model is rather heavy, not least because of the counterweights to prevent the notorious tail-sitting. The green one, which is printed as one single part, is in no way strong enough, will bend and propably breake. I'm thinking about metal casting by a goldsmith, but I guess this wouldn't be cheap. So right now, I'll try a multi-piece landing gear with 2mm steel rod enforcement. The upper part of the fork now consists of two halves which cover a bent steel rod.  There are still weak spots, but maybe it works. Whish me luck 
 

 

 

 
Cheers
Alex

Thanks, Jason!
 
 
 
I regarded a 2mm hard spring steel rod as necassary.  But I was in no way able to bend one single rod  tight and precise enough at the three 90 degree corners.
Now thinking about it, I guess a combination of steel tubing with 2mm inner diameter as connector, 2mm spring steel rod sections for the straight areas, and some more easily bendable 2mm rods (brass?) for the corners, all jacketed with printed resin halves, could work and would be much stronger than my recent effort.
 
Let's see, maybe I'll give this a try. Until now, the model stands stable on its legs..
 
Cheers
Alex
 

Thanks guys!
 
 
I think you are right, if everything else fails, a metal landing gear would be a reasonable investition. Meanwhile, I provisionally pluged the steel-rod-enforced legs and the small support struts into the the designated openings in the wheel wells for a first test. And right now, it looks promising. Not bending visible
 

 

 
I'll leave it like this for a while to see if it stays stable.
 
Cheers
ALex

Thanks, Jason!
 
 
 
I regarded a 2mm hard spring steel rod as necassary.  But I was in no way able to bend one single rod  tight and precise enough at the three 90 degree corners.
Now thinking about it, I guess a combination of steel tubing with 2mm inner diameter as connector, 2mm spring steel rod sections for the straight areas, and some more easily bendable 2mm rods (brass?) for the corners, all jacketed with printed resin halves, could work and would be much stronger than my recent effort.
 
Let's see, maybe I'll give this a try. Until now, the model stands stable on its legs..
 
Cheers
Alex
 

Thanks, Mark!
 
I know what you mean. I printed the parts with a resin that is advertised to be very strong. After all parts were glued together, I put some more liquid resin at the seams and put it under UV light to cure. Now, It's more or less one single resin part with steel-rods within. I'll watch it for some time and hope that is stays stable, especially at the weak point you mentioned.
 
One nice thing is that the balance can now be checked to prevent tail sitting. Until now, the necessary counterweight at the area forward of the main landing gear has only been roughly calculated. Now, with most weight-relevant parts provisionally attached, it already stands like it should. And the resin engines and the forward landing gear isn't attached yet, so I think at least regarding that aspect I'm safe. The weight on the nose landing gear will be minimal, so a fully printed nose gear without metal-rod-enforcement should be fully sufficient.
 

 
Cheers
Alex

Thanks guys!
 
 
I think you are right, if everything else fails, a metal landing gear would be a reasonable investition. Meanwhile, I provisionally pluged the steel-rod-enforced legs and the small support struts into the the designated openings in the wheel wells for a first test. And right now, it looks promising. Not bending visible
 

 

 
I'll leave it like this for a while to see if it stays stable.
 
Cheers
ALex

Interesting project
 
 
That's my philosophy too

Thanks guys!
 
 
I think you are right, if everything else fails, a metal landing gear would be a reasonable investition. Meanwhile, I provisionally pluged the steel-rod-enforced legs and the small support struts into the the designated openings in the wheel wells for a first test. And right now, it looks promising. Not bending visible
 

 

 
I'll leave it like this for a while to see if it stays stable.
 
Cheers
ALex

Hello there, again little progress.
One thing that causes headache is the main landing gear, which is angeled forward in a scary way, while the whole model is rather heavy, not least because of the counterweights to prevent the notorious tail-sitting. The green one, which is printed as one single part, is in no way strong enough, will bend and propably breake. I'm thinking about metal casting by a goldsmith, but I guess this wouldn't be cheap. So right now, I'll try a multi-piece landing gear with 2mm steel rod enforcement. The upper part of the fork now consists of two halves which cover a bent steel rod.  There are still weak spots, but maybe it works. Whish me luck 
 

 

 

 
Cheers
Alex

Thanks, Mark!
 
I know what you mean. I printed the parts with a resin that is advertised to be very strong. After all parts were glued together, I put some more liquid resin at the seams and put it under UV light to cure. Now, It's more or less one single resin part with steel-rods within. I'll watch it for some time and hope that is stays stable, especially at the weak point you mentioned.
 
One nice thing is that the balance can now be checked to prevent tail sitting. Until now, the necessary counterweight at the area forward of the main landing gear has only been roughly calculated. Now, with most weight-relevant parts provisionally attached, it already stands like it should. And the resin engines and the forward landing gear isn't attached yet, so I think at least regarding that aspect I'm safe. The weight on the nose landing gear will be minimal, so a fully printed nose gear without metal-rod-enforcement should be fully sufficient.
 

 
Cheers
Alex

Thanks guys!
 
 
I think you are right, if everything else fails, a metal landing gear would be a reasonable investition. Meanwhile, I provisionally pluged the steel-rod-enforced legs and the small support struts into the the designated openings in the wheel wells for a first test. And right now, it looks promising. Not bending visible
 

 

 
I'll leave it like this for a while to see if it stays stable.
 
Cheers
ALex

Hello there, again little progress.
One thing that causes headache is the main landing gear, which is angeled forward in a scary way, while the whole model is rather heavy, not least because of the counterweights to prevent the notorious tail-sitting. The green one, which is printed as one single part, is in no way strong enough, will bend and propably breake. I'm thinking about metal casting by a goldsmith, but I guess this wouldn't be cheap. So right now, I'll try a multi-piece landing gear with 2mm steel rod enforcement. The upper part of the fork now consists of two halves which cover a bent steel rod.  There are still weak spots, but maybe it works. Whish me luck 
 

 

 

 
Cheers
Alex

Thanks, Mark!
 
I know what you mean. I printed the parts with a resin that is advertised to be very strong. After all parts were glued together, I put some more liquid resin at the seams and put it under UV light to cure. Now, It's more or less one single resin part with steel-rods within. I'll watch it for some time and hope that is stays stable, especially at the weak point you mentioned.
 
One nice thing is that the balance can now be checked to prevent tail sitting. Until now, the necessary counterweight at the area forward of the main landing gear has only been roughly calculated. Now, with most weight-relevant parts provisionally attached, it already stands like it should. And the resin engines and the forward landing gear isn't attached yet, so I think at least regarding that aspect I'm safe. The weight on the nose landing gear will be minimal, so a fully printed nose gear without metal-rod-enforcement should be fully sufficient.
 

 
Cheers
Alex

Thanks guys!
 
 
I think you are right, if everything else fails, a metal landing gear would be a reasonable investition. Meanwhile, I provisionally pluged the steel-rod-enforced legs and the small support struts into the the designated openings in the wheel wells for a first test. And right now, it looks promising. Not bending visible
 

 

 
I'll leave it like this for a while to see if it stays stable.
 
Cheers
ALex

Hello there, again little progress.
One thing that causes headache is the main landing gear, which is angeled forward in a scary way, while the whole model is rather heavy, not least because of the counterweights to prevent the notorious tail-sitting. The green one, which is printed as one single part, is in no way strong enough, will bend and propably breake. I'm thinking about metal casting by a goldsmith, but I guess this wouldn't be cheap. So right now, I'll try a multi-piece landing gear with 2mm steel rod enforcement. The upper part of the fork now consists of two halves which cover a bent steel rod.  There are still weak spots, but maybe it works. Whish me luck 
 

 

 

 
Cheers
Alex

Thanks, Jason!
 
 
 
I regarded a 2mm hard spring steel rod as necassary.  But I was in no way able to bend one single rod  tight and precise enough at the three 90 degree corners.
Now thinking about it, I guess a combination of steel tubing with 2mm inner diameter as connector, 2mm spring steel rod sections for the straight areas, and some more easily bendable 2mm rods (brass?) for the corners, all jacketed with printed resin halves, could work and would be much stronger than my recent effort.
 
Let's see, maybe I'll give this a try. Until now, the model stands stable on its legs..
 
Cheers
Alex