Cox .01 /.02 /.05 /.09 /.15 Speed Planes

The Program I have can be searched as WAVEosScope V2.1

Ok do not have the other software, I am aware of it there was a few updates to it.
The software I use is fine for IC planes.

The pass at 23 seconds into the video went:
26,839 rpm that is 127 mph pitch speed less drag air temp
Safe to say your all over 119 mph with a clean plane.

Had it been a sheet wing style plane rather than a thicker foam wing
you could hit 130 mph + with that power package.
At 25.2k rpm 7x6 will bust 130 actual.

5S makes 33k rpm no load per your Kv. / makes my reading very good data for you.

Foam planes need a lot of watts per the more beefy drag.
Note how fast my Nano design goes on just 79w static.
The wing airfoil thickness is 6.4mm counting covering.

It is the fastest Cox 8cc 3ch plane on youtube.
Flown to apex speed down wind at the camera.
There is a new plane called Nano X it is made to do over 145

Published on Feb 10, 2018
NANO III / 9oz / 28" span 86 sq. in  / APC 4.22x5.5N
Best pass 26,647 rpm / 139 mph prop speed
Static 20,370 rpm / .106hp / 79w / 106 mph PS / 6oz thrust
1oz fuel / 25% nitro / 20 castor
With speed, the sound follows behind the plane neat effect.
Checked all passes found the best per posted vid:
Per Audio RPM Gauge 26,647
Per Prop Calc 139 mph
Per Doppler Wav. Scope software 136 mph / 219 Kp/h

https://www.rcgroups.com/forums/showthread.php?2684743-Speed-Planes-010-to-15-Size-Engines/page28#post39152138

Eric,
Greg's adapter is for turbo plugs
If you are buying Nelson plugs you need the Galbreath adapter.

Oz
Audio "RPM Gauge" (Android)

Prop Thrust Calc
http://www.godolloairport.hu/calc/strc_eng/index.htm

NANO X - maiden flight here's how it went down at the field today:


Published on Aug 4, 2019
HQ 4x4.5 set NV bit rich to insure a full flight and get the surfaces trimmed.
Game plane find out if the design specs pan out and land safe. Insure all
the new radio gear works and the fuel tank is feeding well.


Published on Aug 4, 2019
2nd flight testing / tuning engine / trimming plane still.
Went with a RP6 Medium heat plug lasted the flight.
NANO X / Tee Dee .05 / Profi .8cc Tuned Pipe
25" span / 75 sq. in. / 8.2oz RTF
Peak 33,100 rpm / 141 mph pitch speed reached.
25% nitro / 20% oil / No SPI Cox 05 engine.
1oz fuel tank with no pressure tape.  
Static 25.8k rpm peak / 7.4oz thrust

Need a sunny day next time for better vidz with the camera also
realized it was set at 1080P rather than 4K opps.. been awhile
will work on getting my act together for some quality vid runs.
I could see it fine in sky, will work on flying closer now it's trimmed up.
The neon really pops for reference.

The prop started to flutter at 32k plus I can use
this prop with TD .020 no problem also with the
Fuji bearing engine zero play in the axle helps to
keep flutter / stall at bay and has gone as high as 38k
Will have move forward with APC props it's what
the Nano III used up to 138 mph. Only oil on the
plane was on the vertical stab very clean plane.

A TD case with bearings would allow more rpm and stop
the HQ prop from washing out and causing tip osculations.  




 

Thank you Eric and Andras  

Andras,
The Turbo Plugs are selling already It was announced a few week back.

The new design with the header has been requested for .02  / .09
and .15 manifold headers as well to test.
The results of Sundays flights and the bench tests are very good!
The header will allow folks to attach extensions, pipes and mufflers.
The fit is nearly perfect needs a tweak on the ID of the manifold.
The production version still needs to be checked to include the O
ring. I had to replace the first O ring with one that would help
seal the manifold better and keep it from rotating. It's up to Greg
now to get the ball rolling.

Turbo plug page here on CEF the adapter worked great making good static power in the field and in the air.
https://www.coxengineforum.com/t11610p150-cnc-aluminum-010-to-15-engine-parts-prototype-testing?highlight=backplates
They are onsite now see link enjoy, testing was not completed
until they reached the performance of a Nelson plug / adapter.
Testing was passed based on 1 shim add extra shims for larger
props as needed. OS RP6 was used for testing.

https://kamtechnik.com/product-category/cox-aft/

The TD held up well to high rpm peaking at 33.1k many at 32k +
I need to prop for speed now so moving forward with a APC modified to 4.3x5.5
During the second flight I discovered the limits of the HQ 4z4.5 prop combo with a non
bearing TD under flight loads. I expect 29,500 rpm / 154 mph pitch speed. The plane
is going to really move out around 140 mph ground speed / will film at 4k for good clarity.

Thank you Oz    it was fun to get out there to test fly the plane I am
looking forward to trying the next prop APC 4.3 x 5.5N will get some vid and post this weekend.

Thank you for posting a link to the other doppler software I have
downloaded the file will test it out!

Competition .8cc

Most folks tend to generalize 1/2A to include .020 and .010 Cox engines

Published on Aug 7, 2019

NANO X
Stock TD .051 / listen to it jumping up on a tuned pipe.
Amazing really considering the low exhaust timing at 140 degrees.
- Before boost 28,908 rpm
- After boost 33,672 rpm
- 4,764 rpm increase / kicks in 7 seconds into the vid.