PIYURIN .010 * flight video *!! and now also .020...*flight video*

Flew very well like the other one!  
(sun to your back is safe and colors are more noticeable still need a new camera for 1080P)



4.5x2 stock prop
Best pass 24,870 rpm / 47 mph
Peak rpm in a dive 26,243 rpm / 49.7 mph

What is the finished weight ready to fly?

 

Thank you, I posted your flight info on RC Groups:
https://www.rcgroups.com/forums/showpost.php?p=41936627&postcount=1942
Yes you had a good taste of some performance! You can try the Cox 4x2.5 for a
bit more speed.  

Imagine now NANO IV: 3.37 x 4.5 Prop best peak hit 28,585 rpm / 122 mph pitch speed.
Best pass with Doppler 114 mph.


Another prop you can try:
https://www.ebay.com/itm/E-flite-3-75-x-3-Propeller-UM-F-27-FPV-Q-EFLUP037503/392265144929?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D20190212142712%26meid%3Db1f5c70e628b46b58ed0841de680705f%26pid%3D100037%26rk%3D2%26rkt%3D6%26sd%3D323767473596%26itm%3D392265144929&_trksid=p2047675.c100037.m2107



Published on Apr 3, 2016
Lil Speedy TD .020 / 3.75x3 / 31,257 rpm / 148.37 km h / 92.19 mph
Another good reading from a pass about 40ft up / 153 km h / 95mph
Winds 6 to 8 mph. 80 F / Per Doppler and audio app best passes

It just takes practice to get use to the speed it has, with a higher pitched prop you can always throttle
down and punch it in the straights till you get use to full throttle non stop.

Imagine flying a smaller plane with a screaming TD .010 with no throttle control hitting a peak of 130.4 mph.

At launch your heart rate jumps up uncontrollable and breathing gets loud on camera, after about 2 minutes you
calm down enough to hide the breathing from being recorded by the camera mic. You can not blink much as the
difficulty of maintaining a micro plane speeding bullet has all your attention. Even still after 10 flights or so you
start to get use to the speed as the plane is trimmed up well and you know how fast it moves in the sky. Tracking
it becomes second nature between blinks after so many flights you want to make a faster one.

Eric the size of the plane at it's given speed makes it fast to the eyes requiring attention beyond the
more typical larger 1/2A RC models. That particular wing is 22" span allowing the weight capacity
to be generous / lands into the wind with ease. The Lil Speedy II in retrospect is 16.5" span
66 sq. in. and has flow with a TD .010 / .020 and .049. The Piyurin would do well with a TD .049
with a radial mount. It will fly with a thrust to weight that is uninhibited by wind able to go straight
up into the clouds without hesitation. Would require a throttle to master the performance.

The Cox 4D x 2.5P gives it a bit more speed the thrust is still good but less then with the 4.5x2



Published on Jul 12, 2014

TD .020 3ch Lil Speedy I
21in span exhaust throttle sleeve, flying with a Cox 4 x 2.5 prop.
10cc tank / With fuel RTF 5.3oz / 25% nitro 18% castor
Static 17,603 rpm / Best pass unloaded 25,579 rpm / 61 mph PS
The small TD .020 made static: 3.3oz thrust / 42 mph pitch speed
.025hp or 19w of power to fly like it does is amazing!
I did try the APC 4.2x2 the rpm was good and I could tell there
was a bit more thrust, speed was less by around 6 mph solid
smooth pulling with that prop.


 

The new wing certainly allows for plenty of lift.
Not as sexy as the elliptical wing.

Larger ailerons would have allowed good roll rate with the elliptical wing but
if the surface area was not giving you good loops than the other choice would
be stunt flaps aka a separate servo for each flaperon. With stunt flaps mixed
in with the elevator it would most likely loop very tight.