crazy fast 1s micro glider, RET only

[Wayne]

Ok - Power setup I'm trying.
Emax 1407 4100kv
30 amp esc (decided to use the same 2S littlebee unit he suggested as it is known to work for this 1S application)
same voltage booster he uses
2 ES9052MD Emax servos
FrSky SR6 Mini receiver thought the gyro might be handy considering the flying in the wind in my backyard field
APC 5.25 x 6.25 carbon prop
I'm not powering this with an 18650 battery, decided to save some weight and run the 18350 M11 cell we sell here. This is partially why I changed the prop, gets the amp draw down below the 10 amps the cell is rated for, but also gives me more speed.

Looks like about 10 minutes of full throttle assault, (doubt I'll be able to fly at full throttle for very long) at about 8.25 amps max. Reduced throttle should give a lot more run time. He netted 2 hour flight with limited throttle with the larger 18650 cell. I only have 1100mah, but also a nice weight savings. Looks like it will be close to a 1:1 thrust ratio, but that is a just a guess at final weight. Wing is a 24" span EPP.

I need to doodle up a little motor mount and get this figured out.

Digging these little battery cells.

 

[Wayne]

Doing a little work here and there. Thanks to Rafael for printing up the test samples.

Here is the basic layout:

The battery clip and the motor mount are tied together with a 1x3 carbon strip that all glues into the EPP foam wing.

Why a battery clip? I rather like the idea as I can bury the wires and not deal with a plug. I designed the clip to lock the battery in, it snaps very securely, the tape is needed to get the battery out. I'm showing zinc strips for the battery contacts, but will probably use copper in the final. (Some care will be needed not to plug in the battery backwards as that would let the magic smokes out of things.

The carbon fiber allows the motor to be mounted behind the trailing edge where the foam is very thin. Gives a nice level of structure to the entire package without much weight at all. The bottom of the motor mount also acts as a skid to keep the motor from nailing something on a belly landing. Will be able to adjust the battery placement for CG as the tray can slide up and down on the carbon strip until you glue it in place.

Still waiting on my voltage booster so I can solder things together.

 

[Wayne]

The battery can be covered in a little canopy.

 

[zeo0nie1]

looks awesome

 

[Yotaman1985]

Looks like fun Wayne!

 

[Hawaii Sloper]

Is that setup gonna be offered as a kit? wing included?

 

[smirkracing2024]

I might have lost the plot along the way but I thought this was originally going to be a small glider...

 

[Wayne]

Well, this is the same power system. I ordered up a bunch f small wings a long long time ago and they finally showed up and I thought this would be a great use of the power system. So think of it as a test bed.

Will it be its own kit? Maybe. See how things go. I also picked up a DJI N3 and might try to add FPV to the little wing in the future.

 

[zeo0nie1]

to confuse the thread even more: I've been looking for something that can be flown inside a live/work loft. I wonder how slow you can get a flying wing to go? I like the pusher prop so I wouldn't break them as often.

 

[Wayne]

Hmm, probably not as slow as you would like. Very thin airfoil.

 

[smirkracing2024]

Had one of these a while back and flew the heck out of it indoors.

https://www.towerhobbies.com/product/e-flite-umx-night-vapor-rtf-with-as3x-and-safe-select/EFLU1300.html

 

[Wayne]

I should probably start a new thread for this little wing. I am currently referring to it as the "little wing"

Wired up the stabilized 6 channel receiver with the voltage booster. LOL the booster is nearly as big as the receiver. (receiver is about the size of 2 normal sized servo connectors)

If I was really good the booster would be tucked under the receiver, but I'm just not that into tiny soldering.

 

[zeo0nie1]

Had one of these a while back and flew the heck out of it indoors.

https://www.towerhobbies.com/product/e-flite-umx-night-vapor-rtf-with-as3x-and-safe-select/EFLU1300.html

looks like a good trainer for the kids. yeah, that's the ticket - it's for the kids.

 

[smirkracing2024]

looks like a good trainer for the kids. yeah, that's the ticket - it's for the kids.

You won't believe how many trainers I have for the kids. Oh, and I also have the more advanced models they need *when they are ready*.

And some kits they need to build.

Those kids had better get busy.

I should probably start a new thread for this little wing. I am currently referring to it as the "little wing"

Wired up the stabilized 6 channel receiver with the voltage booster. LOL the booster is nearly as big as the receiver. (receiver is about the size of 2 normal sized servo connectors)
View attachment 27244

If I was really good the booster would be tucked under the receiver, but I'm just not that into tiny soldering.

@Wayne is there a DSMX version for us Spektrum users?

 

[Wayne]

We need to convert you away from Spektrum as some of your kids toys are on the lethal side. Time to leave the parkflyer radios behind.

Any small receiver can be used. Does not need to be anything special.

 

[smirkracing2024]

We need to convert you away from Spektrum as some of your kids toys are on the lethal side. Time to leave the parkflyer radios behind.

Any small receiver can be used. Does not need to be anything special.

Well, I'm in pretty deep, as you know, deep enough that I'd consider a 2nd transmitter. Would you suggest Radiomaster or FRSky or something else?

 

[Wayne]

I am biased but here are the radios I would suggest in no given order:

FrSky
Futaba
Jeti
And then you have some silly expensive stuff out of Europe like the Core.

Of these I think FrSky offers the best bang for the buck and probably the most capable and reliable radios too.

Notice I do not list Radio Disaster or Jumper, or any of the other clone (clown) radios.

When you have lethal models in your collection please use quality radios. All of the brand I suggested use high quality components and structures in their radios. They all own their own RF systems that they have designed and control. They all control the quality of the receivers used to be in perfect tune with their transmitters. And they all have healthy ecosystems with advanced features.

Yes, their are some power pilots that fly Spektrum with big and lethal models, but I personally think this is risky behaviour. It is not a robust RF system and their range and reliability tests poorly when compared to the suggested brands. Especially when you are looking at the dual band offerings from Jeti and FrSky.

 

[smirkracing2024]

I am biased but here are the radios I would suggest in no given order:

FrSky
Futaba
Jeti
And then you have some silly expensive stuff out of Europe like the Core.

Of these I think FrSky offers the best bang for the buck and probably the most capable and reliable radios too.

Notice I do not list Radio Disaster or Jumper, or any of the other clone (clown) radios.

When you have lethal models in your collection please use quality radios. All of the brand I suggested use high quality components and structures in their radios. They all own their own RF systems that they have designed and control. They all control the quality of the receivers used to be in perfect tune with their transmitters. And they all have healthy ecosystems with advanced features.

Yes, their are some power pilots that fly Spektrum with big and lethal models, but I personally think this is risky behaviour. It is not a robust RF system and their range and reliability tests poorly when compared to the suggested brands. Especially when you are looking at the dual band offerings from Jeti and FrSky.

I appreciate the feedback @Wayne. I thought Radiomaster was well-regarded but perhaps not (although personal preferences probably vary greatly).

I have been toying with the idea of a 2nd brand of radio for a while now for various reasons. I'll look into these.

 

[Yotaman1985]

I can second Jeti from personal experience. After getting my Jeti radio, my Spektrum DX8 feels like a plastic toy-grade radio. It took some learning but currently it is way easier for me to set up a model on Jeti than Spektrum now. If you have any questions about Jeti or want to try my radio next time we fly youre welcome to.

 

[Wayne]

Radiomaster is built from the lowest value electronics. They make the radio look fancy, and have slick marketing, but that is about all they have to offer IMHO. Most Radiodisaster people will talk about how great their radio is, but then they seem to replace them every year for the new model. Why? The new model doesn't do anything different.

You buy one of the suggested brands and you have an 8 year radio. Chances are you will have no issues with the hardware or electronics in that time frame. Maybe a new battery pack.