Posted by RC Roundtable | Today @ 03:13 PM | 1,130 Views
Episode 141: "Round Top Recap" is now live!
http://www.rcroundtable.com/podcasts...pisode_141.mp3

In this episode, the gang talks about all the cool stuff they saw and did at the inaugural Round Top RC Expo.
-Welcome to Round Top (1:50)
-HUGE Triplane (14:15)
-Fitz's Fleet (36:30)
-Swap stories (52:10)
-Terry's workbench (1:14:15)
-Leprechaun maiden (1:20:40)
-B-25 status (1:29:10)

You can visit our website at RCRoundtable.com to listen over the web or download an MP3 of the show. Or, you can subscribe to RC Roundtable on iTunes.

We would love to read your comments and ideas. Please drop us an email: [email protected].
Posted by Swanlander | Today @ 12:39 PM | 1,276 Views
Avro Vulcan Bomber (4 min 21 sec)

Posted by Quagga75 | Today @ 10:54 AM | 1,612 Views
A digital recreation of my favourite Slopie from the Nineties.
The .flz file can be opened with http://flz-vortex.de/flz_vortex.html and exported to .dxf etc.
Posted by Old_Pilot | Today @ 09:38 AM | 1,927 Views
Das Ugly Glider - Part 6

Got the motor and folding prop fitted and balanced, installed the battery and ESC, checked the weight so far (31 oz), and then put her on the CG balance.....right smack dab where she's supposed to (20% of MAC). I figure that the covering will add another 2 ounces (9.5 sq ft) so the estimated AUW will be 33 oz. Projected wing loading will be 33 oz/ 3.41 sq ft = 9.67 oz/sq ft.....Couldn't be more pleased
Posted by Tazkiller85 | Today @ 06:03 AM | 2,700 Views
🧐Yep Les Amis,
Mini Crash-Test, Maxi résistance ! Dans cette semaine spéciale voitures RC, nous allons commencé par le test de la nouvelle Wltoys 284131. Une petite voiture de drift typée rallye qui en a sous la pédale ! Très compacte et bien équipée avec ses nombreux LEDS, ce petit véhicule sera aussi à l'aise en intérieur qu'en extérieur (en évitant les gravillons, sable etc ... ). Parfaite pour toute la famille, experts ou débutants, avec son réglage de puissance et extrêmement durable même en cas de choc assez violent ! Avec un tarif aux alentours des 50€, cette nouvelle Wltoys trouvera certainement sa place sous le sapin, perso, je valide ! ... Prenez soin de vous (et des autres) et merci à tous pour votre soutien .


WLTOYS 284131 Mini RC rally & drift 1/28 - Review Test Démo - Pour toute la famille (21 min 46 sec)


🧐NOTATAZ : 18/20 Costaud la petite !!!

- Wltoys 284131 Drift car (coupon BG38db1f ): https://www.banggood.com/custlink/GGDdeqT4Gp
- Pièces détachées et Upgrade : https://www.banggood.com/custlink/v3GynhS3Lu
- Wltoys K989 (coupon BGVehicles10) : https://www.banggood.com/custlink/KDGEnYSvet
- Wltoys K969 (coupon BGVehicles10): https://www.banggood.com/custlink/KmvEny8D4c
- JIMI JM - GNT80 ( 30€ avec le coupon BG2c1997 ) : https://www.banggood.com/custlink/3G3hbRRag0
- Gilet chauffant : https://www.banggood.com/custlink/mGvhAdhoAm

😋Pour TOUS LES BONS PLANS, RENDEZ-VOUS dans le :
- TABLEAU DES...Continue Reading
Posted by NobatteryNopower | Today @ 04:23 AM | 3,097 Views
These are my findings so far in controlling a WS2812 ledstrip via RC control (PWM signal) - This post will be update when I make progress. My project doesn't work correct yet. Still some debugging to do. The code will be posted once it works.

LEDs used are WS2812. In my case two strips of Matek. (see attachment)

First result tinkering with Arduino. Bug fixes needed: Leds need to start on LOW / Off, and they light up, but never turn off when decreasing PWM
Arduino WS2812 control with PWM - Not quite there yet (0 min 20 sec)

Posted by burkefj | Yesterday @ 03:31 PM | 6,727 Views
Hi all, here are two that I just finished. They are upscales of R/C rocket glider kits I have produced in 2.6" diameter, but these are one off's just for me using BT-101 tubing and 3-d lightweight printed cones from Scott Binder, most markings from stickershock with some hand cut accents and fine line sharpie detailing. Both have very similar specs, 33-37" wingspan, 56-60" lengths, weights dry 24.5 ounces as shown, with 29mm H-13 longburn motor, add 7.25oz for rtf weight.
Uses 9mm depron sheet for flight surfaces with 1/8" carbon spar reinforcement. Pretty happy with how they turned out. They both use tail surfaces only for roll and pitch like the smaller versions.

First is an Orbital Sciences Pegasus XL Second is an upscale of the Estes Space Transporter America with wing upsized for glide(which looks more proportional to me than the original).

Waiting for some more springlike weather and my latest rocket motor order to arrive for maidens.

Frank
Posted by kopterheld | Yesterday @ 03:31 PM | 6,677 Views

Here I show how to load a FrSky R9M 2019 ACCESS module with ExpressLRS firmware and use it with an R9MM receiver. So there is the best firmware for old hardware that reaches a range of over 35km.

ExpressLRS - https://www.expresslrs.org/1.0/
Radiomaster TX16S - https://www.banggood.com/custlink/vGvKMV73QP
FrSky Taranis Q X7 - https://bit.ly/qx7blue
FrSky R9M 2019 - https://www.banggood.com/custlink/vKvYoerctR

My video (EN subtitle) -
ExpressLRS 868mHz mit FrSky R9M Modul und Taranis Q X7 (8 min 1 sec)



FrSky R9M and Lite 868mhz can be operated with ExpressLRS. On the right the R9MX and R9MM receivers

...Continue Reading
Posted by Mad_angler1 | Yesterday @ 01:09 PM | 7,579 Views


DJI Ocusync The Story So Far

Discussing the DJI Ocusync system and how its changed since it first released on the Mavic Pro and now is unto to O3+ on the new DJI Mavic 3.

We also look at why the Mavic 3 may not be compatible with the DJI Smart controller and Ocusync 2.

DJI Ocusync & The Mavic 3 - The Story So Far (26 min 20 sec)

Posted by USKP01261 | Yesterday @ 07:56 AM | 8,957 Views
MODEL: Sunriser
DESIGNER: Jamara (germany)
DATE: 1995-ish
WING SPAN (in): 97.5
WING AREA (in^2): 608
AIRFOIL: Eppler 205
LENGTH (in): 48.5
AUW (oz): 48.5
W/L(oz/sq-ft): 11.5
POWER: turnigy 2830 motor with (I think) 10x6 prop
NOTES: Very nifty twin boom design (nifty but fragile). This was from an ARF kit w/ some mods to wing joiner areas for additional shear web/strength. Per the notes on the manual: “The well-known record pilot Dr. Hackstein, set two world records with a flight time of approx. 10 hours and a distance of 240 km”. Modified fuse for brushless motor. Larger than necessary 3S, 11.1V, 2200 mah lipo and 4.8v, sub-c 3600 mah receiver battery - I think because it was designed for large NiCd battery needed the additional weight in the nose to get proper CG. Original RCM, review published AUW was ~50oz so not too far off of that.
Posted by old4570 | Nov 29, 2021 @ 06:15 PM | 14,109 Views
FMS800 Vtail (5 min 45 sec)


I haven't flown this in a long time ..
The conditions were really sweet , the 800 just needed a little trim ..
Anyone that likes a really gentle flying model ..

This one has a Hobby King folding prop and almost the entire flight was @ 50% throttle .
Posted by rtl | Nov 29, 2021 @ 04:46 PM | 14,609 Views
Like anything else, learning what’s involved in a new hobby is the first step to taking it on. From figuring out what tools you’ll need, finding a place to store essentials and creating an organized place to work and play, it’s always important to do some preparation. That is especially true for aviation modeling.

Aviation modeling is a lot more than kits and parts. Before you even open your first kit, you need a dedicated space where “the magic happens.” Having a prepped location ready for your first build will make the whole process much easier (and a lot more fun) so that’s why we’re sharing these tips.

Let’s get started!

Dedicated Location

First off, you’ll enjoy your build more if you have a dedicated space. You need the freedom to spread out and stay organized. It will make a big difference when you don’t have to clean up in the middle of your project (or worry about the family pup getting into your small-parts pile).

If you have a spare room you have the perfect space and an old table is all you really need. You can also use plywood and sawhorses if they are sturdy. Once you find the perfect spot with a solid and flat work surface, you’re ready to start adding tools.


Building Boards

Few modelers build directly on their work table. They often use “building boards” with a cork top surface. These soft-top building boards allow modeling pins to be pushed into their surface so you can hold all the parts of a build kit safely in place.


...Continue Reading
Posted by pinstripelounge | Nov 29, 2021 @ 01:36 PM | 15,192 Views
Sears 1988 Wish Book!

Lobo's



If anyone enjoys these old catalogs, you can check out more at christmas.musetechnical.
Posted by pinstripelounge | Nov 29, 2021 @ 10:53 AM | 15,824 Views
JCpenney christmas catalog from 1989!

They even accepted checks and money orders then, no paypal!



If anyone enjoys these old catalogs, you can check out more at christmas.musetechnical.
Posted by BAF23 | Nov 29, 2021 @ 10:22 AM | 16,169 Views
Pic heli 700 0120crc


Rationale

Shortly after obtaining my basic R/C helicopter license end of summer 2021 and building up confidence flying scale maneuvers with my T-Rex500 based Hugues500, I started thinking about larger scale-helicopters. The models on my dream list were either too expensive or just unavailable. Vario helicopters seemed the best but way above my paycheck because a new camper had soon to be paid for. Roban helicopters seemed nice but many people were complaining about the lack of support/spares from the German dealer. Next option was to browse through fora for second-hand reasonably priced relatively large helicopters. I wanted overall length to be under 2meter so it would fit in the camper’s garage. Two 6S5000 batteries in series would be nice to standardise with other planes in my EDF fleet. I preferred a voluminous body for better visibility but mechanical spares availability was paramount.

The acquisition

A few weeks later I made a deal with a Walloon modeller who sold a Funkey bodied Hugues500E around T-Rex700L DFC Dominator mechanics. A first look at the model confirmed it was in excellent accident-free original condition and equipped with quality electronics. To me it looked big and attractive and was sold because the owner only flew it sporadically for years and lately preferred his larger more recent Vario helicopters. He demonstrated the model in rather windy conditions while I took a video of that. Halfway the demo I already was...Continue Reading
Posted by Old_Pilot | Nov 29, 2021 @ 08:21 AM | 17,304 Views
Das Ugly Glider - Part 4

Got the center section of the wing done and hinged the feathers...Will start on the outboard sections of the wing today
Posted by --Oz-- | Nov 29, 2021 @ 02:28 AM | 20,020 Views
I came across a YT video on how to build a good quality microphone for low cost. He does a nice job on the mic and the circuit I figured could be updated for better performance .

Building a quality USB-C microphone (23 min 34 sec)


I thought of a few improvements:
Low noise is one of the keys to a good mic as you know. Many different paths for noise to enter and different ways to minimize the noise and some other improvements.

Filtering:
1. DCDC converter:
I don't see the need for the big RC filter (100Ω + 2200uF) with huge size electrolytic caps. The dcdc converter only has 33mA max output and the circuit current draw is very little. More importantly is low voltage ripple (from getting into the signal through the supply rails). The dcdc converter is running at 90KHz, that is the target freq needed to reduce ripple voltage. As a minimum a LC filter of 220uH and 1uF would be recommended. In effort to reduce voltage ripple even more, adding a second LC (making a PI filter) is one option. This should do much better for filtering noise from the switching boost converter and USB supply. For the input dcdc rail, low esr (X7R or X5R) 0.1uF and 22uF ceramic caps should be added.

2. IC Amp filtering:
I would add caps placed as close as possible to the IC power pins. A low esr (X7R or X5R) 0.1uF + 1uF ceramic caps on each rail (pin #4 and #7).

3. Max capacitance: The dcdc converter datasheet shows "the maximum recommended output capacitance is 10μF",...Continue Reading