Aviation Design's Diamond 70mm EDF - Plans and Build
- Thread starter DamoRC
- Start date
@Kevin
Sure - let me check that its up to date and I will attach it to the Zip file that has the tiled plans at the start of this thread. Those plans work fine. I have made some tweaks since so I also need to update the plans. Should get this done over the weekend.
@ Stig
Thanks! I really like(d) flying this plane although it does (did) have a tip stall tendency that you had to be aware of. The version in the build thread was the one I flew at FFW and I had been flying it every time I was at the park since then. Just put it on the short grass, give her 100% throttle and after 15-20 feet take off.
I finally convinced DamoRC Jnr to fly it a couple of weekends ago - he worries about crashing planes that I really like to fly. But I had built a new, slightly modified version and the original has taken quite a beating so it was getting to the end of its shelf life. Unfortunately he had a radio problem (post mortem confirmed that the shielding on his TX antenna had split) and it lawn darted. Initial assessment was that a little hot glue was not going to fix this...
The new version was an attempt to make the build easier and hopefully get rid of the tip stall. The tip stall wasn't a huge problem, you just needed to know it was there.
This is the new build.
Ignore the tape between the EDF holder and the rear of the fuse. Once I had finished the build I wondered what the ESC and EDF would do on 6S and I can confirm that the Vktech RS Pro 70mm Ducted Fan+ B2839 3000KV that I got from ebay throws all of its magnets at 6S! So I had to cut the EDF unit out, re-glue the magnets and re-install - that's why the rear looks a little messy.
Main changes are a flat bottom, FT style airfoil (using the same planform that is in the current plans), a single layer horizontal stabilizer with a simpler elevator setup, and the fact that I did not score and bend the turtle deck pieces, I just removed the paper on the inside and rolled them. Also cut a hatch in the top which works nicely.
Good news is that there is no tip stall with this wing - you can bank and yank as hard as you want, and slow way down without dropping a wing-tip - love flying this version.
DamoRC
Sure - let me check that its up to date and I will attach it to the Zip file that has the tiled plans at the start of this thread. Those plans work fine. I have made some tweaks since so I also need to update the plans. Should get this done over the weekend.
@ Stig
Thanks! I really like(d) flying this plane although it does (did) have a tip stall tendency that you had to be aware of. The version in the build thread was the one I flew at FFW and I had been flying it every time I was at the park since then. Just put it on the short grass, give her 100% throttle and after 15-20 feet take off.
I finally convinced DamoRC Jnr to fly it a couple of weekends ago - he worries about crashing planes that I really like to fly. But I had built a new, slightly modified version and the original has taken quite a beating so it was getting to the end of its shelf life. Unfortunately he had a radio problem (post mortem confirmed that the shielding on his TX antenna had split) and it lawn darted. Initial assessment was that a little hot glue was not going to fix this...
The new version was an attempt to make the build easier and hopefully get rid of the tip stall. The tip stall wasn't a huge problem, you just needed to know it was there.
This is the new build.
Ignore the tape between the EDF holder and the rear of the fuse. Once I had finished the build I wondered what the ESC and EDF would do on 6S and I can confirm that the Vktech RS Pro 70mm Ducted Fan+ B2839 3000KV that I got from ebay throws all of its magnets at 6S! So I had to cut the EDF unit out, re-glue the magnets and re-install - that's why the rear looks a little messy.
Main changes are a flat bottom, FT style airfoil (using the same planform that is in the current plans), a single layer horizontal stabilizer with a simpler elevator setup, and the fact that I did not score and bend the turtle deck pieces, I just removed the paper on the inside and rolled them. Also cut a hatch in the top which works nicely.
Good news is that there is no tip stall with this wing - you can bank and yank as hard as you want, and slow way down without dropping a wing-tip - love flying this version.
DamoRC
I have never tried one with a 64mm unit. All up weight on this build with a 2200mAh 4s is 32oz, so I would think that you would be okay with a 64mm.
DamoRC
Sky Sword?
So there I was at work checking my email as I often do and saw a new Hobby King ad and thought of this build.
Is it me or does this bear a remarkable resemblance to your build?
So there I was at work checking my email as I often do and saw a new Hobby King ad and thought of this build.
Is it me or does this bear a remarkable resemblance to your build?
Holy cow! $430? That's insane for a sport jet EDF! You could get almost any of the super scale freewing EDfs at that price.
TurtlesThatFly
Member
It's pretty big...
https://www.youtube.com/watch?v=LO3ap9W5sPA
https://www.youtube.com/watch?v=LO3ap9W5sPA
@JimCR120 - It's not so much that it looks like my build, it's that a few manufacturers are now making 90mm EDF versions of the original plane that I was trying to model, Aviation Design's Diamond, designed by Éric Rantet.
DamoRC
jaredstrees
Well-known member
How does that vetch rs pro 70mm hold up under 4s? I'm thinking of picking on up for a winter build, but $26 sounds too good to be true!
I have had no problems with them. I got two and flew them in a Diamond, the A-4, the Reichenberg and the Ohka (obviously not all at the same time) always on 4S.
What is your winter build gonna be?
DamoRC
TurtlesThatFly
Member
im going to china to scour for electronics and see what i will make out of them
and also a pink foam mirage thing
noname4now
Member
Hi...whats the specs of this plane ? I am thinking to build one for 50 mm edf...need to scale down accordingly..
Its ~50 inches long, ~37 inch wingspan, uses a 70mm EDF (5 blade, 3200KV) and a 2200mAh 4S. All up weight is ~32 oz.
The sketchup file is included in the plans posted at the top of the thread. So you could just scale it down from there (note the flattened parts in the Sketchup file were modified after flattening so they don't 100% match the parts in the 3D model).
Would be cool to see someone try a 50mm version of this.
DamoRC
The sketchup file is included in the plans posted at the top of the thread. So you could just scale it down from there (note the flattened parts in the Sketchup file were modified after flattening so they don't 100% match the parts in the 3D model).
Would be cool to see someone try a 50mm version of this.
DamoRC
noname4now
Member
Thanks damorc for the fast response...I will try to build one very soon.
Sorry Therry - keep meaning to update these plans and include the CG.
The CG is 6.5 inches forward from where the tailing edge meets the fuse.
Any pics of the build?
DamoRC
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