Official Nexa 1870mm DHC-6 Twin Otter Canadian Yellow (Balsa ARF) Discussion Thread

[Gilatrout]

I sometimes think some of those Horizon tech guys are handicapped by their own lack of understanding of the things they sell.
I think differential thrust may require an extra channel for mixing. A "ghost" channel like we see in those 6-ch. smart RX's are likely not to work because you need a physical port to plug one throttle channel into. I hope I'm wrong.

I agree, the ghost channel probably won't work for differential throttle. This is why I'm using an 8channel receiver on the Otter. I may ultimately end up going with the 10 channel receiver so that I can break out other controls into separate channels.

[Gilatrout]

I sometimes think some of those Horizon tech guys are handicapped by their own lack of understanding of the things they sell.
I think differential thrust may require an extra channel for mixing. A "ghost" channel like we see in those 6-ch. smart RX's are likely not to work because you need a physical port to plug one throttle channel into. I hope I'm wrong.

You are totally right about that. I sent them mail showing how it just worked using stock equipment and processes for setting up the feature.

This is their response
There will always be work arounds however, right now Horizon's official stance is that it does not work and that is correct. We glad to see that you got it working, Unfortunately we will not be able to suggest it to others in the future.

Thank You,

Matt G.

[xviper]

Typical! This was the same reply they gave out for the Eflite 80mm F-16. A few people played with it to get thrust reverse. It wasn't till it was public knowledge on the forums that Horizon posted that yes, indeed, ALL Avian smart ESCs when teamed with any "smart" receiver could get reverse to work. Then they made a video to show it.

[MeyerVW]

The nose and engine nacelles are a very different color yellow than the aircraft. Did anyone repaint these parts, with what color yellow?

[xviper]

The nose and engine nacelles are a very different color yellow than the aircraft. Did anyone repaint these parts, with what color yellow?

That’s weird. Take a part of the plane that’s the right color to your local Home Depot and have them color match it. I have the tropical theme, so the plane is mostly white and the nose and engine nacelles were a good match.

[MeyerVW]

I may return this bird. I pulled all the parts out to inspect and the coloring on it all is whack. So many different colors of yellow going on here. and none of them match each other. I dont want to spend more money to correct what should be correct in the first place. I wrote a ticket to them on this so I will see if we can work it out but this is disappointing..

[xviper]

I may return this bird. I pulled all the parts out to inspect and the coloring on it all is whack. So many different colors of yellow going on here. and none of them match each other. I dont want to spend more money to correct what should be correct in the first place. I wrote a ticket to them on this so I will see if we can work it out but this is disappointing..

It sure is. I hope you get a satisfactory resolution to this. I don't mind doing a few "tweaks" to any model, but this would be very annoying and unacceptable. I'm wondering if this whole pandemic thing caused a disruption in the paint batches being used to paint different parts in different places in the assembly process. Motion should inspect all shipments of these sorts of kits before sending them out.

[MeyerVW]

I could go down to space age paints to have a spray can made up. Its $25 for 5oz of paint. Did this with my Kuluka AL37. Repaint all the parts, they dont match anyway. Landing gear, antennas, windscreen, nacelles, and nose. I will have to sit on this a few days. Like the aircraft but my disappointment is high right now. Maybe a few beers will help.

[MeyerVW]

That is odd. I took the aircraft out into my living room and the color is not as bad. My room lighting makes this look horrible. Its still off but not that bad. So i will keep it.

[Gilatrout]

Well, I'm annoyed.

So I decided to go with the OV10 prop and spinner set up. Seems like a perfect solution. 3 blades, counter rotating, good looking spinners on the Otter. No brainer right? I installed the recommended motors (Admiral 3520-950kV) in the wings and ordered the prop adapters and spinners.

They arrived today. Hurray \o/

The prop adapters don't fit. In fact, no Flightline adapter will fit on an Admiral motor as far as I can tell. The Admirals use 3 screws, Flightline uses 4 to attach the adapter to the motor.


So plan B. Going to now order the OV10 motors. They are same size but lower KV (3530-860kV) . I''m hoping I'm not screwing myself and underpowering the Otter. I'll have to see when the motors arrive and I watt test the revised setup.

I'm annoyed because I bought these motors for other ARFs and so far I've found them for one reason or another to be unsuitable for the projects, even though they are the motors Motion recommends. Sure I could go with 2 bladed props but no scale guy is ever going to find that tolerable. It makes me itch just to think about it.

So anyway, If you want/require 3 bladed counter rotating props, you will want to look at motor options other than the ones recommended by Motion.

[Gilatrout]

The OV10 props and spinner repainted to be more Otterly. I really like how they came out.


I also make a tin box for every plane I own. I keep things like wing bolts, extra screws, whatever I don't want to forget. The box generally fits in the battery bay so it won't be left behind. Unlike the wings. I haven't figured out how not to sometime forget the wings...

[arkreal1]

Anybody has floats would like to sell?

[yohay@aol.com]

On the BH Giant Corsair sold by MRC, what is a good known CG that you guys using?
the book is recommending 128mm
Any advise?
Tx

[xviper]

On the BH Giant Corsair sold by MRC, what is a good known CG that you guys using?
the book is recommending 128mm
Any advise?
Tx

This is the Nexa Twin Otter thread. You should ask this in the Black Horse Corsair thread.

[Gilatrout]

Well

The OV-10 motors arrived. They watt test out to 84 Watts/lb.

Assuming the same setup on the lighter OV10 and that comes out at 95 Watts/lb

Pretty marginal for the Otter I think. My field's Alt is 5200 and summer temps put our adjusted alt at 9000ft. I know the OV10 flies well year round...

Damn, and other expletives, I was hoping this would work.

Back to the drawing board and more money wasted.

[MeyerVW]

Gilatrout, I have the flightline motors and adapters and now looking for props and spinners. The OV10 one look nice. Do they fit to the flightline adapters just fine? Ill go look but what size are the props? What does the back of your spinner plate look like?

[MeyerVW]

That thought was no good so I had to edit to this. Sorry

[Gilatrout]

Gilatrout, I have the flightline motors and adapters and now looking for props and spinners. The OV10 one look nice. Do they fit to the flightline adapters just fine? Ill go look but what size are the props? What does the back of your spinner plate look like?

Not sure which flightline motor you have, but in general I believe the OV10 setup will fit. Flightline motors typically have 4 screws for the adapter. The Admirals recommended by Motion have 3, thus any adapter for a flightline motor will not fit the Admirals.

That said, you can still fit the Ov10 props and spinner on the Admiral prop adapter, but you will not be able to screw the spinner cap down. You would have to glue the spinner together, which means break a prop, you also buy a new spinner.

[MeyerVW]

Not sure which flightline motor you have, but in general I believe the OV10 setup will fit. Flightline motors typically have 4 screws for the adapter. The Admirals recommended by Motion have 3, thus any adapter for a flightline motor will not fit the Admirals.

That said, you can still fit the Ov10 props and spinner on the Admiral prop adapter, but you will not be able to screw the spinner cap down. You would have to glue the spinner together, which means break a prop, you also buy a new spinner.

I have the Ta152 motors. I need to see the back of the OV10 spinner plates to see how will this will fit, or just get dubro spinners and somebody eases props. The Ta152 motors are bigger than the OV10's. I used them in my BH He111 and they have a lot of power. They are similar size to the Admirals. The Ov10 motors are short ones. Can you get a get me a pic of the back of the spinner plates you did, please? They look fantastic after you painted them.

[xviper]

The back of the OV-10 prop holder plate will have a hex hole that mates with the hex nut on the prop adapter on the motor. If you're not going to use the OV-10 motors, the hex hole won't interfere with mounting the plate over the motor shaft. Just use a thin layer of FoamTac on the back flat surface of the plate so it grips the face of the motor. Same can be done on the front fact of the plate/prop so the washer and nut will grab better. FoamTac never really hardens so separation of parts is not that difficult.
The front of that plate, is molded such that the OV-10's 1-piece prop fits into the slots exactly. If you are going to glue the spinner cones onto the back plate, use a thin layer of FoamTac. This will hold it on securely but will allow removal later without destroying the cone or plate.
Can't remember if I stated what I've got on my TO but I'm using HobbyKing Aerostar 850kv motors with the props and prop holders off a HobbyKing Albatross. They are similar kv but these motors have more grunt than the OV-10 motors so they can easily spin the Albatross props to max speed. I found the OV-10 motors where a bit on the anemic side for the OV-10 so I replaced those with Eflite Power 25 motors and the 5-blade Scimitar props/holders/spinners from the Eflite EC1500. I didn't think the OV-10 stock motors would have enough grunt to pull the much heavier and draggier airframe of the TO. I like my planes to be able to do a loop from a level pass, without fallen out at the top of the loop, which the stock OV-10 does.