Official Nexa 2100mm F-82 Twin Mustang (Balsa ARF) Discussion Thread

[TwistedGrin]

ADVISORY ALERT:

The NEXA F-82 delivers equipped with Retracts and Landing Gear Pre-INSTALLED.

Contrary to the list of equipment "Required" on MotionRC WebSite:
Retracts are not required via separate purchase
Landing Gear Struts are not required via separate purchase

Advisory Complete

TwistedGrin
Also Noting: The model is delivered with pre-hinged and glued control surfaces.....Aileron, Flap, Elevator are Dubro Nylon Flat hinges / Rudder hinges are CA

[TwistedGrin]

The suggested retracts from MotionRC for this bird are out of stock.....will be interesting to see if the X-Wave retracts will work after I receive the bird.

Continuing to study the performance from various motor/prop/battery/ESC power usage numbers via e-Calc...looks like twowinggtj's 300gram Turnigy NTM 4258-500Kv 14x8 prop package is very close to the 346gram E-flite Power 52 590Kv 12x8 prop package ...I find this interesting considering the difference of prop size alone!

TwistedGrin

[Twowingtj]

Congrats! Looking forward to following your progress.

[TwistedGrin]

I have made the jump.....now awaiting the bird and servo's, LG struts and prop spinners and graphics.....with all the strategy for storage and transport and maintenance regarding the wiring......this bird may take me awhile to complete

TwistedGrin

[TwistedGrin]

Thinking about jumping in one of these ARFs.....running possible set up using components I already have:

Motors: E-flite Power 52 590Kv (346g each)
ESC: Spektrum Avion 80Amp
LiPo: 6s 50c 5200mAh
Prop: XOAR PJN 12x8x2
Hitec HS-645MG servo's

e-Calc provides results as following:
Weight: 14lbs
Wing Area: 48.1 dm2 (SWAG)
Power to Weight: 189W/lb
Wing Load: 43.3oz/ft
Stall speed: 34mph
Top speed: 85mph
Mixed flight time: 9.1min
Max Amp Load: 59.7A
Max Power 2530.4W

Nexa does not provide numbers for Wing Area....so I inserted SWAG values to arrive at a Wing Load (43.3oz/ft) ....this is heavy but allows e-Calc to provide some numbers.

I fly several twin configuration models but run them in series or parallel.....this model wires each fuselage LiPo direct its ESC (save weight on wiring cables and connectors)?
I am accustomed to powering the electronics via separate battery (RX Battery) .....perhaps this model could use one fuselage side flight battery with an external UBEC to supply power?

My concern is the lateral imbalance....don't deploy a separate Rx Battery that would otherwise make one side heaver than the other?

Finally.....I prefer counter rotating props ....but understand some don't bother with this.....

Comments welcome and thanks in advance

TwistedGrin

Black Horse Dornier 335
Flightlne P-38
FMS TigerCat
FreeWing AL37
HobbyKing B-17
HobbyKing DC3
Nexa OV-10 Bronco
Seagull Cessna 337
Seagull Mosquito (RIP Failure)
Seagull Mosquito (RIP Failure #2)
I hang my head in shame and accept defeat on SG Mossies

[Evan D]

Gasoline? It takes a .45- .50 glow. My suggestion is to reconsider unless you have a lot of experience with IC twins. A dead stick on one motor takes a good pilot to fly her in and a war bird is worse than most.

[Spikedcheeto]

Hi, I was wondering if this plane is worth the effort and how much room do you get inside the plane? I want to run gas so what's someone recommend for good size gas engine?
Thanks

[Twowingtj]

how much weight do i need to figure in the nose to get cg, checking inverted f-82

That really depends on the weight of your power system.

I'm running 500kv motors on 6S 5000mah batteries. No extra weight was needed. I did have to alter the battery area to get them to fit.

[tim hench]

what kind of weights to buy for it

[tim hench]

how much weight do i need to figure in the nose to get cg, checking inverted f-82

[Evan D]

Yes, check low wing airplanes inverted. Bigger discussion is wheels extended or retracted. I do extended but many will argue that.

[tim hench]

should the cg on twin f-82 work turned upside down , ckecked it upright need to add 1.19 pound up front, baffeled ?????????

[tim hench]

moved battery tight to firewall the cg still don;t seem right 3/5/64th is that good to work with f-82 twin

[Twowingtj]

do you epoxy the main wing spar tube in.

tim hench Welcome to Hobby Squawk!

The yellow paint is Rust-Oleum 2 in 1 spray paint, Canary Yellow. Krylon will work as well. No surface prep was needed other than a wipe down with alcohol and water.

The ESCs see attached to the top, inside of the firewall, battery compartments.

My wing tube is not epoxied in. It's slid in place and secured with 3 screws. One in the center wing section and one in each wing panel. This holds the quite securely. I put alignment marks on the wing tube and the outer ribs of the center section. This helps line up the center screw. Once that one is in place, the outer panel screws line up well. I didn't use the supplied screws for this. I went a little bigger and longer.

[tim hench]

The struts were so tight and grabby upon compression, I had to dis-assemble, polish the barrels inside and out and then grease the inside of the tubes and remove burrs from spring.and grease with some Super-Lube. Now they are sweet.

[tim hench]

do you epoxy the main wing spar tube in.

[tim hench]

also where do you mount the esc

[tim hench]

what paint u use for that detail yello

[Twowingtj]

I’m ordering mine today, I’m going with value hobby .46 electric motors.

Welcome to Hobby Squawk!

Looking forward to hearing about your progress with this bird.

[linkedge540]

I’m ordering mine today, I’m going with value hobby .46 electric motors.