LitterBug's Strix Nano Goblin Build

LitterBug

Techno Nut
Moderator
Building a "NEW" from kit Strix Nano Goblin. It can EASILY fly sub 250g and achieve close to an hour of flite time on a 2S LiIon battery.

I have been a BIG fan of the Strix Nano goblin ever since it was released in 2017. I bought one of the original PNP birds when they became first available and flew it probably into the thousands of miles over the last seven years, Mostly FPV, till it's demise just before combat last year at Flite Fest. The original PNP versions were glued together at the factory, and whatever glue was used had begun to fail in various places. The final straw was when the control horns came loose and uneffective in a full speed dive.... No pulling out. Straight into a small rock, smashing the glass lens on the Runcam FPV camera, and obliterating the chassis. Having INAV, GPS, and Radio telemetry allowed me to punch the GPS coordinates in my phone, and walk back out to the point where it impacted to retrieve the electronics that I had missed when picking up the EZ 2 Find white pieces. i've actually flown the GPS and Flight controller in a ZOHD Drift since then.
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I originally bought a ZOHD Drift to replace it, but soon found out that it is no substitute for the Nano Goblin. So here I am going down the building my Third NG so I have two flying. Going with ArduPilot and Walksnail which will be an upgrade from INAV and Analog FPV. The one surviving part from the OG is the motor which escaped unharmed. I still have the top hatch which I glued back together as a spare. I may hack that up if I decide to cut it and mount the FPV VTX in it. Here is the Full kit as it comes out of the box: (Servos and Motor NOT INCLUDED in the basic kit, but can be ordered with the kit.)
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I will be using Foam-Tac to glue it all together. I prefer it over E6000 for it's strength, pliability, lightness, and ease of use. I'll use a 20A ESC, two EMAX ES9051 digital Servos, and the FC/FPV gear to be determined after getting the basic bird into PNP status.

Cheers!
LitterBug
 
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LitterBug

Techno Nut
Moderator
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Pre-assembly: Motor mount wood, hatch magnets, bottom wing plates, control horns with elevon carbon reinforcements, and hatch tab glued. We'll let that all set up for a while before main assembly.

Going to use the Walksnail V3 nano I've been flying in the ZOHD Drift, and a SpeedyBee F405 wing mini for the electronics. Will pre-fit the camera before gluing the fuselage halves together.

LB
 
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Houndpup Rc

Master member
View attachment 249087

Pre-assembly: Motor mount wood, hatch magnets, bottom wing plates, control horns with elevon carbon reinforcements, and hatch tab glued. We'll let that all set up for a while before main assembly.

Going to use the Walksnail V3 nano I've been flying in the ZOHD Drift, and a SpeedyBee F405 wing mini for the electronics. Will pre-fit the camera before gluing the fuselage halves together.

LB
Looks fun! Does it fly like the FT Goblin?
 

LitterBug

Techno Nut
Moderator
Better question... Does the FT Goblin fly like the Strix Nano Goblin that it was modeled after? I guess this is something I need to pick up as a kit at Flite Fest this year. Too much to get done before Flite fest to do it before.

ReadyMadeRC and FT worked together on it. FT has featured quite a few RMRC/Strix planes in their videos and sold their products over the years, and RMRC has sold FT gear and products in the past too.
 

Houndpup Rc

Master member
Better question... Does the FT Goblin fly like the Strix Nano Goblin that it was modeled after? I guess this is something I need to pick up as a kit at Flite Fest this year. Too much to get done before Flite fest to do it before.

ReadyMadeRC and FT worked together on it. FT has featured quite a few RMRC/Strix planes in their videos and sold their products over the years, and RMRC has sold FT gear and products in the past too.
I liked watching the video of when they were designing it. Man! Andres had quite some crazy flights!
 

LitterBug

Techno Nut
Moderator
Funny thing is, for my most flight hour plane I have surprisingly little FPV footage of it on my YouTube. There also seems to be one of my videos of it missing that I know was uploaded....

This was the OG pictured above after coverting it from a PWM reciever and AIO camera to a FC running INAV and component FPV gear. It was flying fine till I switched it in to AutoTune. At that point it locked up in a roll and the only control I had was the throttle. Just missed the parked cars and went into a fence post behind the field. I even started at 300ish ft which is more than three mistakes high, but could not regain control. The whole nose was knocked off into about 20 pieces. Glued it all back together and it flew another five years till last summer.

 

Houndpup Rc

Master member
Funny thing is, for my most flight hour plane I have surprisingly little FPV footage of it on my YouTube. There also seems to be one of my videos of it missing that I know was uploaded....

This was the OG pictured above after coverting it from a PWM reciever and AIO camera to a FC running INAV and component FPV gear. It was flying fine till I switched it in to AutoTune. At that point it locked up in a roll and the only control I had was the throttle. Just missed the parked cars and went into a fence post behind the field. I even started at 400ish ft which is more than three mistakes high, but could not regain control. The whole nose was knocked off into about 20 pieces. Glued it all back together and it flew another five years till last summer.

Wow! good thing you didn't sail threw one of the car windows! Flew FPV in my Scout the other day! very cool! (though it's hard the first time to trust your plane to some wiring and signal! lol
 

Mr Man

Mr SPEED!
This was the OG pictured above after coverting it from a PWM reciever and AIO camera to a FC running INAV and component FPV gear. It was flying fine till I switched it in to AutoTune. At that point it locked up in a roll and the only control I had was the throttle.
I don’t understand any of this…
 

Mr Man

Mr SPEED!
Just missed the parked cars and went into a fence post behind the field. I even started at 300ish ft which is more than three mistakes high, but could not regain control. The whole nose was knocked off into about 20 pieces. Glued it all back together and it flew another five years till last summer.
This I do.
 

LitterBug

Techno Nut
Moderator
This is my #2 Goblin being maidened with a FT aura and AIO camera. You can see a big difference in the field of view. The AIO is super wide angle compared to the Runcam on the OG.

 

LitterBug

Techno Nut
Moderator
I don’t understand any of this…
If you watch the first video, the flight mode is shown in the middle near the bottom. When you see it switch to autotune mode, That's when the flight Controller (FC) locked up preventing any stick inputs from controlling the plane. That's what caused the long slow roll of death.
 

LitterBug

Techno Nut
Moderator
One of the reasons I don't have much footage of it is the sheer volume of video I would have had I recorded it all. LOL

The other thing is the constant Yaw waggle of the Nano Goblins is not very great to watch. Any wind at all and it can be very nauseating. You can really see the waggle in the second video above. I never had a small HD camera with image stabilization to capture better footage. That will change with the more modern FC with SD logging for the gyro data to pump into GyroFlow for footage stabilization. I could in theory use a WalkSnail camera with a built in gyro for native stabilization.

The majority of my footage is from the StratoSurfer which is a more typical plane and much heavier which punches through the gusts better.
 

LitterBug

Techno Nut
Moderator
I've test fit a few different Walksnail cameras. The Nano cameras (14mm) are a bit on the small size, and the Pro camera (19mm) is a perfect fit. Leaning tword the pro camera on a single antenna V3 VTX. That will give it native gryro stabilization and MUCH better low light capability.

Also wondering how much flite time I can get out of a 2S 21700 5000mah vs 2s 18650 3500mah. EZ to eek out 45-50 minutes from the original 18650, so the 21700 should give a good bump even though it will be heavier. I've found I get less time out of my 3S 18650, but not sure they are 3500mah cells since they have a higher C rating. I tend to fly a bit more aggressive on the higher output cells too. The original batteries would not output more than 12A. The newer cells will output 25A and may only be 2800mah. I also have two different motors between the two Nano Goblins. Original PNP was a Cobra1407 3500kv, and my 2nd kit build has an Emax RS1606 4000kv. Now have a 3rd motor mount and can play with other alternate motors I have laying around. Have the wires socketed so it is easy to swap them out. I have been running 2 blade 4.1x4.1 props as those seem to be the most efficient setup. Will go vertical into oblivion, especially on 3S. I have some 8 blade props which sound cool like a jet, but are slower.

Mocking up final assembly. Wings, tails and servos have not been glued. Need to verify servo horns are centered before glueing those.

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LB
 

LitterBug

Techno Nut
Moderator
Looks fun! Does it fly like the FT Goblin?
I went back and looked at the FT goblin Video and build specs. It is somwhere between the Strix Nano Goblin and full size Goblin motor wise. Nano goblin would be hard pressed to hit 100mph flat and level with the 140x/160x motors. The FT goblin can do it all day long with the 220x quad motors, The Full size Strix goblin can do 150 EZ with the 2216+ish motors.

I need to find someone to trade planes with at FF'25 for comparison.
 

Houndpup Rc

Master member
I went back and looked at the FT goblin Video and build specs. It is somwhere between the Strix Nano Goblin and full size Goblin motor wise. Nano goblin would be hard pressed to hit 100mph flat and level with the 140x/160x motors. The FT goblin can do it all day long with the 220x quad motors, The Full size Strix goblin can do 150 EZ with the 2216+ish motors.
Hmmm, I had a 2306 on mine and I don't think it went 100.....
 

Houndpup Rc

Master member
I went back and looked at the FT goblin Video and build specs. It is somwhere between the Strix Nano Goblin and full size Goblin motor wise. Nano goblin would be hard pressed to hit 100mph flat and level with the 140x/160x motors. The FT goblin can do it all day long with the 220x quad motors, The Full size Strix goblin can do 150 EZ with the 2216+ish motors.

I need to find someone to trade planes with at FF'25 for comparison.
Wow that FS one is cool!