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Posted by old4570 | Dec 28, 2017 @ 07:24 PM | 2,575 Views
I think I mentioned I picked up some Bargains before Christmas ( The last of them came today ) ..
One of those bargains was a WL Toys A303 Buggy .. ( We are talking bargain )

Anyhow , the battery does appear to be a 2s 3.3v per cell ( Life ? ) ..
Well , there is no balance lead .. And checking after installing said balance lead , yeah ! There is a need for it ...

A) I unwrapped the battery just enough to expose the contacts ..
B) With your Multi Meter find the contact for the back or front of the batteries where they are joined for series .. On the MM this will show the individual voltage of each cell
C) Once you find the contact for the middle wire , solder in your balance lead
D) Make sure your solder joints are good
E) Re wrap the battery

I really like balance charging ( really I do ) . Not doing so can lead to all sorts of possible issues ..


Its not hard ! Positive and negative contacts are already a given .. Simply solder your Balance lead wires to these contacts ...
What is just a fraction challenging is finding a contact point for the series connection . ( Thats why you own a Multi Meter ? - Right ? )
So there you have it , another bush league mod !

2s Balance lead :

A lot of these have a black wire in the middle and a yellow wire on the outside ...
Just remember the middle wire goes to where the battery pack is connected in series ( no mater its color ) and the outside wires go to positive and negative where your power lead is connected . ( At least they use Red for the positive wire )
Posted by blackmennewstyle | Dec 28, 2017 @ 07:19 PM | 1,643 Views
Eternal Pak Chong - ปากช่อง - Thailand - DJI Phantom 4 (4 min 13 sec)


It's the end of the year, people are generally coming with an annual flight compilation, well i did the same with my P4 but through one of the most magnificent area here in Thailand.

Enjoy the last few days of 2017 and happy flying!
Posted by storm57 | Dec 28, 2017 @ 07:11 PM | 1,726 Views
Are you in need of a professional hobby model builder?
I offer my services building RC Planes, Scale helis, 3D models, Rc cars , Boats and have 30 years of building experience. Models are built according to standards and in accordance to customer specs whether intricate details or simply models. My experienced in building and flying models spans from since my childhood. Quality of equipment and materials is always what I emphasize on to my customers to make a real model flyable and realistic.

I charge basically for my labortime and depending the size of model. My materials are basically added towards my labortime like glues, covering materials, special paint and customizing using airbrush. Customers shoulders all expenses on models, upgrades, shipping and for parts required by them.

For more info. Feel free to call (253)259-1372.
I am located in Auburn, Washington.
Samples of my work done are shown in photo. I've done models for people from West to the East Coast, Canada....Continue Reading
Posted by Glosh | Dec 28, 2017 @ 07:05 PM | 1,499 Views
In order to have a preliminary design tool for propeller-motor matching and in lack of public propeller performance data tables for many propellers manufacturers, I've been trying to obtain 2 simple formulas that approximates the propeller’s Thrust and Power coefficients (CT and CP) as a function of only Diameter(D), Pitch(P), RPM and advance ratio (J = V/(n*D)). The first two are usually the only parameters made available and RPM and J are inputs.

CT = CT(D,P,RPM,J)
CP = CP(D,P,RPM,J)
T = CT*rho*n^2*D^4
P = CP*rho*n^3*D^5

In reality, dimensional analysis proves that both coefficients are a generic function of the following parameters:

CT = CT(J,Re,Ma,Beta,shape)
CP = CP(J,Re,Ma,Beta,shape)

Where Re is the Reynolds number, Ma is the Mach number at the tip and Beta is the angle of incidence at ¾ of the wing span.

I figured that besides from the general shape of the propeller, Diameter, Pitch and RPM should be sufficient to represent Re, Ma and Beta. J we have as an input, Re and Ma can be written as functions of D and RPM, as for Beta, pitch is defined as how much would the propeller travel forward with one revolution, so we can argue that the P/D ratio is somewhat related to a “average angle of incidence” of the propeller.

To derive such formulas, I applied metaheuristic research algorithms (PSO and GA) on data from UIUC propeller database (http://m-selig.ae.illinois.edu/props/propDB.html) and Tmotor propellers (http://store-en.tmotor.com/). Almost...Continue Reading
Posted by storm57 | Dec 28, 2017 @ 06:41 PM | 1,597 Views
Are you in need of a professional hobby model builder?
I offer my services building RC Planes, Scale helis, 3D models, Rc cars , Boats and have 30 years of building experience. Models are built according to standards and in accordance to customer specs whether intricate details or simply models. My experienced in building and flying models spans from since my childhood. Quality of equipment and materials is always what I emphasize on to my customers to make a real model flyable and realistic.

I charge basically for my labortime and depending the size of model. My materials are basically added towards my labortime like glues, covering materials, special paint and customizing using airbrush. Customers shoulders all expenses on models, upgrades, shipping and for parts required by customers.

For more info. Feel free to call (253)259-1372.
I am located in Auburn, Washington.
Samples of my work done are shown in photo. I've done models for people from West to the East Coast.
Posted by newelectro | Dec 28, 2017 @ 03:45 PM | 1,929 Views
Good day at field two flights on me-163 tho motor sounds like it is getting tired. Flew Strega two times will be going to 5s soon on it. Two flights on Excalibur and 1 flight on F22.
Posted by RS2K | Dec 28, 2017 @ 03:16 PM | 85,461 Views
This thread is for the discussion of testing the Fast Kalman filter on Betaflight.

The source code can be found here:
https://github.com/rs2k/betaflight/
https://github.com/apocolipse/betaflight/

All previously released binaries can be found here:
https://www.dropbox.com/sh/lw5fuu72g...j0SoBH1Pa?dl=0

The latest and recommended binaries can be found here (2018-02-17 3.3 RC1 build with FKF bugfix applied by Apocolipse).
https://www.dropbox.com/sh/pkppzfo7l...WCTQeJAka?dl=0


Thanks to Apocolipse for adding the bugfix PR to get the FKF correctly re-enabled. It looks like the FKF was mistaken blocked by an wrongly placed #ifdef and it was recently discovered the BQRC2 filter does not work as intended.

To enable the FKF with the most recent bin:
Code:
set gyro_use_32khz = ON
set cpu_overclock = ON
set gyro_stage2_filter_type = FKF
set gyro_kalman_q = 400
set gyro_kalman_r = 88

Posted by Stanbur | Dec 28, 2017 @ 12:41 PM | 1,745 Views
Home again now. Good days and bad. Dr said I should have more good as time goes. Good days are just fair. Bad days are pretty bad. Still pretty much house bound for now, but hoping to get more active as the spring weather comes in. pretty cold here this morning. Supposed to get into the single digits in a day or so. I am weak, tired and not eating much. But hey, I never lost any hair off my head. Body hair is all gone, I look like a newborn, only bigger and uglier. LOL.
Posted by ariaAQ | Dec 28, 2017 @ 12:04 PM | 2,575 Views
Back to 2015, this is one of the most powerful racing motor i can get.
I decided to make a new lighter frame for the motors.
Lets see how the old guy perfoms, paired with the new Racerstar Tattoo 35A ESC's..

SunnySky x2207s 2700kv 3S brushless motor thrust test 6040 5040 (7 min 45 sec)


As you can see, this motor still has a lot of thrust. smooth, and superb built quality.
I'm not a racer, so 3S + 6040 CF props + 35A ESC setup should be enough for me..

Motor: Sunnysky x2207s 2700kv
ESC: Racerstar Tattoo 35A, https://www.banggood.com/4X-Racersta...1291912201502M
Propellers:
- Carbon FIber 6040,
- Kingkong 6040, https://www.banggood.com/10-Pairs-KI...1291912201502M
- Plastic 5040, (sorry, the green propeller is Gemfan 5030)
- Carbon fiber 5040 self lock,...Continue Reading
Posted by phil alvirez | Dec 28, 2017 @ 11:10 AM | 2,906 Views
browsing i found this: https://www.banggood.com/Unique-Mode...r_warehouse=CN
the proportions look great: longish wing, caracteristic of high performance gliders looks promising, and long fuselage makes it look elegant. besides, the style is great too. long fuselage is not the trend in gliders, but long tail moment speaks stability, and long nose provides room for the things we need to put inside.
i finished it and am waiting for weather to let me fly it, although where i live means 4 months, so in the meantime i will talk about whatever regarding it.
there are 2 threads:
https://www.rcgroups.com/forums/show...pan-EPO-Glider
and this: https://www.rcgroups.com/forums/member.php?u=557269
index: https://www.rcgroups.com/forums/show...m-Wingspan-EPO
so you can learn about the experience of some.
if you browse at the links you will see that just as there are comments about how good the plane is, there are also problems, like poor quality parts, some size does not match (screws to hold the wing), no availability of spare parts, lack of instructions (the so-called 'manual' is a joke), too much drag at the aileron pushrods, and so on... new products are subject to iniciation, and it is not until feedback may help suppliers to correct them, but even with these problems, the plane has a lot on its favor, so will explore the posibilities...
>>>will keep adding comments below <<<
dec 30/2017:...Continue Reading
Posted by JureZ | Dec 28, 2017 @ 10:52 AM | 1,664 Views
After having kept it a couple of years in the attic, waiting for the right time to maiden, I have finally decided to fly it at the Bayside RC club.
There is a nice geotextile runway where many types of airplanes are flown, gas , electric , EDFs , and turbines.

here is the video :

T-28 Trojan maiden flight at Bayside RC Club - Movie (2 min 45 sec)

Posted by newelectro | Dec 28, 2017 @ 10:41 AM | 1,617 Views
Turned on magnetic release by accident with gyro in plane gyro went wacko and plane went straight in. I have took magnetic switch out and put glued back together, new gyro and rudder servo. Ready for test flight again.
Posted by natester | Dec 28, 2017 @ 10:39 AM | 1,811 Views
I did a review of a bunch of box-style goggles a while ago and have finally gotten around to trying out some slimmer (and perhaps more popular) dual-screen goggles. You can read the post on box-style goggles here: https://nathan.vertile.com/blog/2016...-goggle-guide/

For this comparison, I bought a pair of Fatshark Dominator HD and some Aomway Commanders. The full review is here: https://nathan.vertile.com/blog/2017...guide-round-2/, but the TLDR is that there are pros and cons to both the box-style vs. the Fatshark style and you get what you pay for. I'm not sure the Fatsharks are 5x better than the box style goggles, to justify their 5x price.



However, having all of these goggles, I do usually tend to use my Fatsharks, though the picture quality is less immersive than the box style goggles, the overall form factor is much more convient. Also, if you do get two-screen goggles like Fatsharks or Aomway or Skyzones, be sure to measure your IPD (as described in the post). Mine is just slightly wider than the goggles are designed for, which means they barely fit.

Finally, the Fatsharks take way more setup time than the Aomway, especially if you want to install a diversity receiver with antennas on opposite sides of the goggles, like I did.

Keep reading here: https://nathan.vertile.com/blog/2017...guide-round-2/
Posted by eoin1 | Dec 28, 2017 @ 09:39 AM | 1,405 Views
ive designed the chasis for my first build which will be a quadcopter with 6" props. Im making it out of 9mm plywood. I haven't commited to any electronics yet but I plan on chosing motors next week. this is my first time ever doing this so if anyone has any tips id love to hear them,wish me luck !.
Posted by thijs slotman | Dec 28, 2017 @ 05:59 AM | 1,629 Views
finaly got to review my toad 90!
Furibee toad 90 review! really good micro! (6 min 51 sec)

hope that you like it!
Posted by cuavlindy | Dec 28, 2017 @ 04:32 AM | 1,715 Views
hi ,dear my friend, do you use this kind of GPS ?
what do you think ?

more detaisl can check here.
https://www.aliexpress.com/store/pro...463c953aPI5oGp
Posted by vincent123 | Dec 28, 2017 @ 03:46 AM | 1,669 Views
I made it myself difficult with the dorsal fin !
Posted by Yowoo Linda | Dec 28, 2017 @ 01:03 AM | 1,652 Views
HRB 1300mah 90C for FPV (0 min 18 sec)

Posted by ydzf110 | Dec 27, 2017 @ 10:28 PM | 1,650 Views
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Views: 0
Size: 32.1 KB
Description:

Original price: $37.35
Now: $31.75

Buy it now :http://ebay.to/2Cg1EXd

USA STOCK :http://ebay.to/2Doi0MC

Store: http://stores.ebay.com/fpvmodelxm Christmas Sale!



The new X-Racer Quadrant ESC is powered by high performance EFM8BB21 MCU, and flashed with BLHeli_S program. It supports multishot/one shot42/oneshot125. With 25AMp constant RMS (30A max) and supports 4-6s (Works well on 3S also).

The four tiny X-Racer Quadrant ESCs can be installed separately on the arms, but also can be installed together like a PCB under the flight controller. The X-Racer ESCs can be considered as 4-in-1 ESCs, but not the same to other 4-in-1 ESCs that only can be used on one PCB. One disadvantage of other 4-in-1 ESCs is, if one part of the ESC damaged, then the whole PCB have to be changed. It would be too much trouble to the pilots. But there will be no problem with X-Racer ESCs. The four tiny ESCs can be used together or seperately. Even one is damaged, you just need to change one, no need to change the whole PCB. (Although we dont believe the ESC would easily damaged. )

Features of X-Racer Quadrant:

1. Can be installed separately on the arms, or 4 ESCs installed together like a PCB under the flight controller.
2. Powered by high performance EFM8BB21 MCU.
3. Flashed with BLHeli_S program. It supports multishot/one shot42/oneshot125.
4. Dshot150/Dshot300/Dshot600 Compatible.
5. With 25AMp constant RMS, 30A max.
6. Designed to support 4-6s Lipo, but work well with 3S also.
7. Only 2.5 grams each piece and 10 grams for a set of 4 pieces.