FT Goblin Group Build

[Sero]

That's a great paint job, the teeth are cool. I gotta buy more CF spars too. Have you flown it lately

Thanks!
I haven't flown it recently, or that much at all, probably less than 25 flights on it. Been busy flying Mini Mustangs, the Bronco and Racer. I was just thinking earlier that I should charge all my batteries, find a whole day and fly till I drain them all.
My wife wouldn't be happy...

 

[BATTLEAXE]

Thanks!
I haven't flown it recently, or that much at all, probably less than 25 flights on it. Been busy flying Mini Mustangs, the Bronco and Racer. I was just thinking earlier that I should charge all my batteries, find a whole day and fly till I drain them all.
My wife wouldn't be happy...

If it was up to me I would have a bandolier of batteries and take a day

 

[danskis]

Thanks everyone for the help. It's now ready to crash test - uh maiden. I expect the fuselage wont survive but I'm hoping with the wing rubber banded on it will survive. I'll add a canopy once I figure out the CG.

 

[mayan]

Thanks everyone for the help. It's now ready to crash test - uh maiden. I expect the fuselage wont survive but I'm hoping with the wing rubber banded on it will survive. I'll add a canopy once I figure out the CG. View attachment 159253

Good luck on the maiden.

 

[The Hangar]

Thanks everyone for the help. It's now ready to crash test - uh maiden. I expect the fuselage wont survive but I'm hoping with the wing rubber banded on it will survive. I'll add a canopy once I figure out the CG. View attachment 159253

Man, that just looks so cool and unique! Good luck on the maiden!

 

[Airkaos]

My new take on the goblin, following “notamedclosed” foamtini from YouTube, I built a different body on the goblin, by making the fb vertical it gives a lot of rigidity the body needed.

 

[Sero]

Change the motor out for this one and put on a 6x4x3 MAS prop. 4s, 40 amps, 600 watts = 100 mph with a slight tailwind....

 

[BATTLEAXE]

Change the motor out for this one and put on a 6x4x3 MAS prop. 4s, 40 amps, 600 watts = 100 mph with a slight tailwind....
View attachment 165338

6x6 might get a bit more speed... just sayin

 

[Wildthing]

6x6 might get a bit more speed... just sayin

I don't think that motor would handle a 6X6 on 4S .

 

[Sero]

6x6 might get a bit more speed... just sayin

Yep and the motor can handle 50 amps, but there's no 6x6 prop in my collection.
Need to fine tune the controls, was way too twitchy at speed despite moving the control rod down 2 holes on the servos.

 

[Sero]

I don't think that motor would handle a 6X6 on 4S .

I ran this motor with a 7x5.5 on 4s on my FT Mustang, but it will get more cooling airflow as a tractor set-up. I usually keep an eye on my motor temps with an infrared thermometer, but I forgot to bring it this last flight, it didn't feel too bad by touch.

 

[Wildthing]

I ran this motor with a 7x5.5 on 4s on my FT Mustang, but it will get more cooling airflow as a tractor set-up. I usually keep an eye on my motor temps with an infrared thermometer, but I forgot to bring it this last flight, it didn't feel too bad by touch.

Somewhere in my trunk I have one (2200kv) but I mostly use the NTM Propdrive 2700kv and 3000kv motors, the new Propdrive V2 I don't find as durable pushing them on 4S . I usually run them with a 6X3 TGS prop and 80A esc on 4S and they still come in warm.

 

[Sero]

Somewhere in my trunk I have one (2200kv) but I mostly use the NTM Propdrive 2700kv and 3000kv motors, the new Propdrive V2 I don't find as durable pushing them on 4S . I usually run them with a 6X3 TGS prop and 80A esc on 4S and they still come in warm.

I read that the V2's are wired different (I suspect Y vs delta, don't know) than the V1's and don't like the higher voltages. I've read 6s is a no but on V1's its ok. All my Propdrives are V2's and have run them on 4s.
Have you played with the ESC timing? Too much advanced timing can get them hot.

 

[Wildthing]

I read that the V2's are wired different (I suspect Y vs delta, don't know) than the V1's and don't like the higher voltages. I've read 6s is a no but on V1's its ok. All my Propdrives are V2's and have run them on 4s.
Have you played with the ESC timing? Too much advanced timing can get them hot.

Never really played with timing in all my years, I should but just lazy .
One time for giggles I threw the 1200kv on 6S using a 5X3 APC prop (test bench) , Short few blasts and it took it , holy crap the thrust was unbelievable and the sound was 10 times worse. You needed hearing protection, I tried to cover my ears with my shoulders it was that bad. Never did try it in a plane, it probably would have been a 1 full wot pass and then up into smoke.

 

[buzzbomb]

Yay, I finally got to maiden this thing. Naturally the nose is now an accordian.

 

[OliverW]

Yay, I finally got to maiden this thing. Naturally the nose is now an accordian.

Congrats on the flight! She is a fun one

 

[mayan]

Yay, I finally got to maiden this thing. Naturally the nose is now an accordian.

Great flight buddy. The Goblin isn’t an easy plane to fly but you did good. Did you add a reflex? That could have helped with having to use full up elevator all the time. Also I’d make it a bit tail heavy to help as well but that’s just me. Though my last flight with the Goblin didn’t end well either.

 

[BATTLEAXE]

Yay, I finally got to maiden this thing. Naturally the nose is now an accordian.

Move the CG back a half inch or so and you will get a better flight, less up elevator

 

[andrej]

Did anyone try to make twin motor out of goblin? How do you think it will be more stable to fly into the wind, and there will be less noise from the engines?

 

[The Hangar]

Did anyone try to make twin motor out of goblin? How do you think it will be more stable to fly into the wind, and there will be less noise from the engines?

It would be similar in stability, however with two motors you’d probably want to upscale the plane depending on what motors tie using, and a bigger plane has more surface area and it’ll get tossed around a little more. Weight will make it more stable, so it you’re using a big battery you’ll have better penetration. As far as noise goes, you could do a twin tractor and that’ll eliminate a little noise but it’ll still be a bit noisy. If you upscale it, and run it off two C or B packs it’ll be quieter than two f packs since they spin a bigger prop more slowly.