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Happy Re: Cox .01 /.02 /.05 /.09 /.15 Speed Planes

Post  Marleysky Fri Feb 02, 2018 2:21 pm

1/2A Nut wrote:10/4 Steve I was given some to test. The machinist will be making them and will send me a link next week to post here
for everyone to buy them as many as you wish. TD .010 and .020 sizes he will continue to make them as long as folks
want them / so keep the contact info when it happens. Beers

Small Cox Logo

Hey, Mr 1/2a Nut,
Did I miss the link for the ordering info on these Aluminum back plates?  
Not sure if I missed it, or possibly it hasn’t been posted?   Please let me know.
Thanks a bunch.
cheers
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Happy Re: Cox .01 /.02 /.05 /.09 /.15 Speed Planes

Post  1/2A Nut Fri Feb 02, 2018 3:43 pm

No you are good he is just behind on another job we are in a holding pattern he has
done up a run of backplates but needs time to set up the link, package and prep  them
all for shipping. When it happens they will be ready to ship upon ordering. I will check
with him again. He is watching this thread too.

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Post  Marleysky Fri Feb 02, 2018 4:10 pm

SUper-Duper!  I can be patient, no problem. I got lots of stuff I’m not caught up on yet, also. So I can wait.  Laughing Thanks for the quick update.
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Happy Re: Cox .01 /.02 /.05 /.09 /.15 Speed Planes

Post  1/2A Nut Fri Feb 02, 2018 8:59 pm

The DAL 3 blade Cyclone props came in these look and fit like a winner.
The draw is the pitch for me 3x5.6 prop will produce some eye popping speed.
Since it is a 3 inch dia the engine should be able to handle the pitch. I have
already bench tested up to 4" pitch props with the TD .020 with excellent results
this prop should be the next step forward with potential for 150 mph flying.

The new age material is tough, I have 8 of these props 4 counter for clockwise
so could use the other four with a Pee Wee engine to make the little wizzer a
real rocket.

TD .020 3x5.6
26,400 unloaded hits 140 mph
28.3k unloaded for 150 mph beast!

To date I have gone 36k with a 3.5x3.5 105mph lack of pitch is the problem.
Screams great with superior fuel draw but no need to scream if the speed is not there.
I am not much for 3 blade props prefer this to be a 3.6x5.6  2 blade will have to take
what I can get.

Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 Imag6818

Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 Imag6817

While back I bought some thick mil zip lock bags the type that will last unlike the thin ones that tend
to deteriorate and open up. Also leave a label in the bag to remind me of what to buy if I need more.

Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 Imag6819
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Post  MauricioB Sat Feb 03, 2018 3:08 am

1/2A Nut wrote:The DAL 3 blade Cyclone props came in these look and fit like a winner.
The draw is the pitch for me 3x5.6 prop will produce some eye popping speed.
Since it is a 3 inch dia the engine should be able to handle the pitch. I have
already bench tested up to 4" pitch props with the TD .020 with excellent results
this prop should be the next step forward with potential for 150 mph flying.

The new age material is tough, I have 8 of these props 4 counter for clockwise
so could use the other four with a Pee Wee engine to make the little wizzer a
real rocket.

TD .020 3x5.6
26,400 unloaded hits 140 mph
28.3k unloaded for 150 mph beast!

To date I have gone 36k with a 3.5x3.5 105mph lack of pitch is the problem.
Screams great with superior fuel draw but no need to scream if the speed is not there.
I am not much for 3 blade props prefer this to be a 3.6x5.6  2 blade will have to take
what I can get.

Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 Imag6818

Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 Imag6817

While back I bought some thick mil zip lock bags the type that will last unlike the thin ones that tend
to deteriorate and open up. Also leave a label in the bag to remind me of what to buy if I need more.

Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 Imag6819

Hello friend !! ... that looks great! Smile
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Post  1/2A Nut Sat Feb 03, 2018 4:03 am

Yes these would work for your plane too =)
I posted a link on the previous page.

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Post  getback Sat Feb 03, 2018 8:46 am

Those are some wicked looking prop. Brad , i like the colors too . The figures you show should make for a screamer!!! Small Cox Logo
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Post  1/2A Nut Sat Feb 03, 2018 10:31 pm

Yes worth a shot if you have the .020 engine wanting more pep.
I will bench test it soon. Small Cox Logo
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Post  1/2A Nut Sun Feb 04, 2018 8:06 pm

Vid of the NANO III with that new APC drone prop I think it's a winner.
Good thrust at the expense of a bit of top end speed still hit 132 mph
prop speed down wind with great vertical climb out. I look forward to
modifying another one for 30k rpm.

With the wind down I was able to input more throw as I flew to relize
I had too much throw after finally getting a second flight. I reduced throws
on my 3rd test flight and it really did very well with passes right in my face
tracks great unfortunately the second vid today stop recording in just the first
3 passes so never got to save the best part of the flight. Lands with no fuss
what so ever with 86.5 sq. in. at 9oz .





NANO III Cox Tee Dee .051 / 2nd test flight APC 4.44x5

Please excuse the smudge mark on the camera lens I forgot to clean it the camera
was not focusing as well on the plane with it there. Next vid will be better.
Popcorn

AmpAbuser
Published on Feb 4, 2018

NANO III Cox Tee Dee .051 / 2nd test flight
Best pass at 27,780 rpm / 132 mph prop speed down wind.
TD RC .051 with stock muffler with a pressure tap.
NV set a tad rich with this being the second flight of the engine.
9oz RTF / 1oz fuel tank 6.04 minutes of total engine run time.
25% nitro / 20% oil

New APC Glass / Nylon Drone Prop tested.
Gives great vertical climb at the expense of some speed.
Static at the field: 21,283 / 8oz thrust / 99.2w / 101 mph

Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 2nd_fl10

Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 13s15710

Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 Vlcsna19


Last edited by 1/2A Nut on Tue Feb 06, 2018 2:02 am; edited 3 times in total
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Post  getback Sun Feb 04, 2018 10:40 pm

Very Happy Very Happy cheers cheers cheers Beer Cheers Man that Babe was getting on with it !! I don't see how you can keep up with it , looking forward to the next run . Thanks Brad Flying Flying Flying
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Post  1/2A Nut Mon Feb 05, 2018 9:12 am

Thank you Eric, happy to finally share a vid makes for icing on the cake Hand Shake

The new APC drone prop worked out well low weight and thin.
I plan to mod another one for all out speed next a 4.3x5N with
the tips swept.

I knew the TD .050 could get better numbers after flying the
Lil Speedy with the TD .049 that plane just didn't have enough
wing span 66 sq. in for comfortable landings.

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Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 Vlcsna20
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Post  halfpilot Tue Feb 06, 2018 4:02 am

I'm in for a few of the .020 aluminium backplates whenever they're ready. Thanks for organising that.
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Happy Re: Cox .01 /.02 /.05 /.09 /.15 Speed Planes

Post  MauricioB Tue Feb 06, 2018 3:41 pm

very good Brad, the speed is really impressive! RC Plane
Tell me, do you have any idea what force the mobile surfaces in the servos exert at that speed?
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Post  1/2A Nut Tue Feb 06, 2018 9:34 pm

Thank you for the greenie!!! Beer Cheers

I am using 9g servos for the elevator and ailerons and the smaller servo for the throttle.
Plane only weighs 9oz but with fuel 10oz so reasonable load when going very fast but only
if you max out the throws I dialed in very little throw in the end to keep the plane easy to
fly smooth. With the small amount of throw the servo never gets near it's maximum torque.
I use 25% throw on the ailerons and 28% on the elevator with my DX6i Spektrum radio.

Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 Imag6427

Stall Torque at (6V): 23oz /in
Operating voltage: 3.0V~7.2V

I use 6.6v 200mah LiFe battery
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Post  MauricioB Tue Feb 06, 2018 9:38 pm

1/2A Nut wrote:Thank you for the greenie!!!  Beer Cheers

I am using 9g servos for the elevator and ailerons and the smaller servo for the throttle.
Plane only weighs 9oz but with fuel 10oz so reasonable load when going very fast but only
if you max out the throws I dialed in very little throw in the end to keep the plane easy to
fly smooth. With the small amount of throw the servo never gets near it's maximum torque.
I use 25% throw on the ailerons and 28% on the elevator with my DX6i Spektrum radio.

Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 Imag6427

Stall Torque at (6V): 23oz /in
Operating voltage: 3.0V~7.2V

I use 6.6v 200mah LiFe battery

I'm in the Chat if you want to share
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Post  Surfer_kris Wed Feb 07, 2018 1:06 am

1/2A Nut wrote:
I use 25% throw on the ailerons and 28% on the elevator with my DX6i Spektrum radio.

You will loose a lot of accuracy that way. It is much better to change the mechanical leverage so that you can use nearly the full movement of the servos.
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Post  1/2A Nut Wed Feb 07, 2018 2:01 am

Hi Kris,

TD .010 NANO II only has 3mm up elevator at the trailing edge:
Nano III has 5mm.

Ailerons:
Nano III is 4mm
Nano II has about 2mm

You should make a micro speedy so you can relate. But yes agreed good trick for
analog servos that don't center well, and when possible.  


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Post  Surfer_kris Wed Feb 07, 2018 4:28 am

I'm not talking about the actual movement of the control surface. If you need input there I can check some of my faster planes. I usually measure the angle of deflection, as it is independent on size, rather than a deflection distance (which is highly dependant on the size of the plane).

The goal is to use the full movement of the servo, rather than limiting the the movement of the servo in the radio. A limited movement in the radio has all sorts of issues, lower resolution, more sensitive to errors in the re-centering of the servo, more influence from connection slop, a higher force (torque) needed from the servo motor etc. etc.
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Post  1/2A Nut Wed Feb 07, 2018 7:37 am

What fast planes do you currently fly Kris?
Yes I know what you meant you have said it all before.

Your servo setup goal not mine, my goal was to design, build,
fly a 1/2A speed plane and post a vid which I have done.
I have taken the time to explain how I set up my servos
and horn size selections on previous design / builds. I just
posted a successful flying vid / photos. This one makes the 9th
plane design in 5 yrs for me, I would like to step it up but was
distracted with 3 outrigger hydro designs and one mono hull during
this time too. I want to do up a sport acro plane at some point soon.


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Post  Surfer_kris Wed Feb 07, 2018 10:19 am

1/2A Nut wrote:
Yes I know what you meant you have said it all before.

It is not me, it is simply common knowledge based on engineering reasoning, why would anyone, knowingly, deviate from that?
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Post  1/2A Nut Wed Feb 07, 2018 3:27 pm

If you wish build a micro plan with minimum space, post some pics, and vids share your
efforts with us rather than nit picking. For the last 5 yrs. you have not posted a single
project build why is that? If you have a link to a productive plane project please feel free
to post it here. I would enjoy seeing some new modern 1/2A projects from you.

My methods work just fine:



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Post  getback Wed Feb 07, 2018 6:54 pm

Josh,, Kris if you got secrets then Please share , Ya 'll been at it a while , I 1/2a know what you two are talking about but thats beside the who is who is who .. Step up to the plate ! All i have seen is Brad doing his thing and doing it well !! so i just learn from what works for the person getting R done and showing that (what ) can bee achieved with these very small engines Small Cox Logo
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Post  1/2A Nut Wed Feb 07, 2018 10:26 pm

Thank you Eric glad you can put up with it all lol.

Thumbs Up Beer Cheers


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Post  Jason_WI Wed Feb 07, 2018 10:58 pm

That thing moves on the drone prop. I would never be able to fly that thing as it’s way too fast for me. Nice video.

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Post  1/2A Nut Thu Feb 08, 2018 12:08 am

Thank you Jason Beer Cheers

The APC drone prop was cut to size for a bit of thrust as per planed
the first portion of the vid that I cut out was me flying at 65% throttle
to trim out the plane. Due to the aggressive pitch at the hub "typical of APC E
props" induced more prop torque than the first flight with another brand prop.

See pic the smaller 4x5 prop is sized for all out speed.

Cox .01 /.02 /.05 /.09 /.15 Speed Planes  - Page 8 Imag6820
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