bracesport
Very Strong User
thanks Nate - this one is a good project! 
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bracesport
Very Strong User
some more progress this morning - this time I attempted to pre-preg the CF tow and roller in the epoxy between foils - after that I placed the wing and trimmed the edges - the underside foil stayed on inside the bag and kept it all tidy while transferring the wings into the bag - so clean, no gloves required - we shall see in the morning!
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bracesport
Very Strong User
Tahoed
Very Strong User
Nope, just your basic 2 servo PSS Here's the RCG build thread... https://www.rcgroups.com/forums/showthread.php?3530031-Zephyr-46-group-build
bracesport
Very Strong User
oh yes, I remember flicking past that thread - nice fuse design. I will go and investigate further!
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bracesport
Very Strong User
The wings turned out great (for a hand built job) - I dry fitted the rotor and wing rod with the slots all cut out and it looks good - working on the canopy as well (just a few tweaks to tidy the fit) - I think I will get it rigged up for a test flight before sanding and finishing.
Really coming along...
Yes, pre-wetting sure makes things easier. But I do suggest you keep the gloves on with Epoxy, the toxins from Epoxy can gang up on you over time. Keep that stuff off your skin!! Read up on epoxy tolerance sickness (something like that). Pretty nasty. First sign is you feel a little sick, maybe land in the ER. Not sure what the cause was, then feeling better you go back into the workshop and REALLY get sick.
Yes, pre-wetting sure makes things easier. But I do suggest you keep the gloves on with Epoxy, the toxins from Epoxy can gang up on you over time. Keep that stuff off your skin!! Read up on epoxy tolerance sickness (something like that). Pretty nasty. First sign is you feel a little sick, maybe land in the ER. Not sure what the cause was, then feeling better you go back into the workshop and REALLY get sick.
bracesport
Very Strong User
thenated0g
Moderator
Konrad
Very Strong User
In post #21 of this thread I showed where I was building a Nexus 900.
Well I just came back from maidening her at Thorton Beach. It is times like these that I wish there were bystanders to video the flight.
The Nexus is fast very smooth in the control response. I was surprised at just how nice this micro glider is in roll, I didn't notice any adverse yaw. Again she was moving very fast, in the 18mph to 25mph wind. I was starting to narrow in on the control response. I'm starting to like the ailerons with 25% expo.
I did notice that the elevator was a little bit slower than say a typical full flying stab. But not much, it really was nice. Elevator does not need Expo. I was a bit concerned with the floating rocker control bar but this was unfounded.
The only down side to this model is that there are no lift control devices. It has been years since I last flew a model where I didn't have spoilerons, flaps or crow. Normally small ships aren't effecient enough to really need lift dump devices. Well, I wish I had them on this ship this time! I messed up one of my landing approaches and tore loose the main pivot tube. This will give me the opportunity to correct a build error I had made in the the vertical stab was not square to the wings. So the crash actually was a good thing.
If the Epoxy cures I hope to try a second flight tomorrow. Maybe I can get lucky and get a dog walker to video a few minutes of flight.
I'm really like this model, not only for its one finger salute to the FAA but also for how nice she flies!
Well I just came back from maidening her at Thorton Beach. It is times like these that I wish there were bystanders to video the flight.
The Nexus is fast very smooth in the control response. I was surprised at just how nice this micro glider is in roll, I didn't notice any adverse yaw. Again she was moving very fast, in the 18mph to 25mph wind. I was starting to narrow in on the control response. I'm starting to like the ailerons with 25% expo.
I did notice that the elevator was a little bit slower than say a typical full flying stab. But not much, it really was nice. Elevator does not need Expo. I was a bit concerned with the floating rocker control bar but this was unfounded.
The only down side to this model is that there are no lift control devices. It has been years since I last flew a model where I didn't have spoilerons, flaps or crow. Normally small ships aren't effecient enough to really need lift dump devices. Well, I wish I had them on this ship this time! I messed up one of my landing approaches and tore loose the main pivot tube. This will give me the opportunity to correct a build error I had made in the the vertical stab was not square to the wings. So the crash actually was a good thing.
If the Epoxy cures I hope to try a second flight tomorrow. Maybe I can get lucky and get a dog walker to video a few minutes of flight.
I'm really like this model, not only for its one finger salute to the FAA but also for how nice she flies!
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Konrad
Very Strong User
Here is a dirty little secret. Most food cans can be used as very effective gauge blocks. Most cans are with in 0.005mm (yes count the zeros) of each other. They need to be this close to run through the high speed canning machinery.
Here I'm using Hunt's Tomato Sauce to hold the vertical stab vertical. I'm using some chili paste cans to define the wing datum.
I hope tomorrow dawns with everything free and in alignment.
Here I'm using Hunt's Tomato Sauce to hold the vertical stab vertical. I'm using some chili paste cans to define the wing datum.
I hope tomorrow dawns with everything free and in alignment.
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bracesport
Very Strong User
Only been in the hobby for a year but my first build was a Sig Seniorita from a kit.
I then decided to take on a challenge and build a tribute to my Dad. While I was serving in Vietnam, my Dad was building OV-10A,s in Columbus, Ohio. Turns out my wife now works for the State in the same building converted to offices. Took me three months of daily determination and lots of questions for those in the know.
This is the 81" model designed by Rich Uravich. No kits available or instructions, only plans along with an article published by the AMA.
Thanks for looking.
Sent from my Moto Z (2) using Tapatalk
I then decided to take on a challenge and build a tribute to my Dad. While I was serving in Vietnam, my Dad was building OV-10A,s in Columbus, Ohio. Turns out my wife now works for the State in the same building converted to offices. Took me three months of daily determination and lots of questions for those in the know.
This is the 81" model designed by Rich Uravich. No kits available or instructions, only plans along with an article published by the AMA.
Thanks for looking.
Sent from my Moto Z (2) using Tapatalk
Konrad
Very Strong User
104g
Spec. is 90g. I'm using 3 of these BMS-101DMG servos
alofthobbies.com
And a single cell 8.5 gram lipo.
alofthobbies.com
And a RX6R
alofthobbies.com
No nose weight needed to reach the manual's 27mm CG
Weight is a secondary or tertiary consideration.
The key to this plane's performance is in the thin low drag wing. It is only 5.5mm thick at the root.
Per the lift equation; Lift goes up by the square of the speed, Drag goes up by the cube of the speed. So by the math drag is a much more important variable than weight. Unfortunately weight does induce drag.
When I look at an aircraft, particularly a slope ship. I look at the drag (low), stiff structure and last low weight.
All the best,
Konrad
Spec. is 90g. I'm using 3 of these BMS-101DMG servos
Blue Bird BMS-101DMG 1.1Kg-cm 13.9oz-in 0.07sec/60°
From Blue Bird Model comes the BMS-101DMG Digital Servo, ready to effortlessly move your control surfaces. Inside is a beefy metal gear train, riding on dual ball bearings for maximum smoothness and durability. The kolibri of servos, this will be a perfect solution for DLGs or micro R/C aircraft...
alofthobbies.com
Dualsky Lipo Receiver Pack 300mAh 3.7V
Great for smaller aircraft such as hand launch gliders, DLG's, small slope ships or you can use it to provide redundancy as a stand alone Rx/servo power supply in smaller power planes.This battery has a JR style male supply (output) plug.Great for gliders / HLG'S/ DLG'S/ Small Slope ShipsCan be...
FrSky RX6R (With UNI-RX Firmware)
The RX6R receiver incorporates all of the functions of X6R. It features 6 high precision PWM outputs and low latency. The PWM output is 9ms faster than the X6R in high speed mode. The RX6R also supports redundancy, this means you can connect another receiver as a back-up in the case that the...
Weight is a secondary or tertiary consideration.
The key to this plane's performance is in the thin low drag wing. It is only 5.5mm thick at the root.
Per the lift equation; Lift goes up by the square of the speed, Drag goes up by the cube of the speed. So by the math drag is a much more important variable than weight. Unfortunately weight does induce drag.
When I look at an aircraft, particularly a slope ship. I look at the drag (low), stiff structure and last low weight.
All the best,
Konrad
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bracesport
Very Strong User
getting a bit more of the detail sorted (no sanding of the parts yet) - 3D printed the canopy and tweaked the rotor assembly to ensure the canopy fits - added the 4mm FG pins into the tail assembly - fired up the servos for a quick check - pretty happy so far!
bracesport
Very Strong User
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