Posted by burkefj | Today @ 03:31 PM | 953 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 | Today @ 03:31 PM | 950 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 | Today @ 01:09 PM | 1,883 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 | Today @ 07:56 AM | 3,266 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 | Yesterday @ 06:15 PM | 8,449 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 | Yesterday @ 04:46 PM | 8,951 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 | Yesterday @ 01:36 PM | 9,528 Views
Sears 1988 Wish Book!

Lobo's



If anyone enjoys these old catalogs, you can check out more at christmas.musetechnical.
Posted by pinstripelounge | Yesterday @ 10:53 AM | 10,163 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 | Yesterday @ 10:22 AM | 10,497 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 | Yesterday @ 08:21 AM | 11,619 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-- | Yesterday @ 02:28 AM | 14,346 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
Posted by scott page | Nov 28, 2021 @ 08:43 PM | 16,997 Views
First impressions on RadioMaster TX16 and EdgeTX.
An article for our club newsletter.

I never learn more than what I learn when I learn I’m wrong. This has definitely been the case for me with RadioMaster and EdgeTX.

Both RadioMaster and EdgeTX may be foreign words to you now, but I’m sure they’ll be as much in the hobby lexicon as Futaba and Spektrum going forward. RadioMaster is a fairly new hobby radio company which was started by two talented visionaries with considerable experience with major companies including Corona, and HobbyKing. These two individuals worked together in HobbyKing upper management for for some time before leaving that post and starting the trading company HobbyPorter. They realized the opportunity to create a transmitter that would be so much more than was currently available so in late 2019 they established RadioMaster. There had been a convergence of technologies that allowed the development of the MPM – or Multi-Protocol Module – which is a transmitter module which allows a single transmitter to selectively use over 75 different protocols including Futaba/SFHSS, RadioLink, Husban, Hitec, HoTT, FrSky ACCST v1 and v2, FrSky D, FrSkyL Flysky, Flysky AFHDS2A, DSM (Spektrum and JR), Corona, and many more used by inexpensive drones and toys. In short – it seems that with the exception of Futaba/FASST pretty much every transmission protocol we see flown at our field can be handled by a radio with an MPM...Continue Reading

ron

Posted by Three-Wire | Nov 28, 2021 @ 06:54 PM | 17,587 Views
A-10 armament
Posted by kopterheld | Nov 28, 2021 @ 06:29 PM | 17,802 Views
The ExpressLRS 2G4 transmitter module ES24TX happy model up to 1000mW, fan, RGB LED and Moxon antenna. Super reception better than TBS Tracer. Range over 30km with 100mW and EP1 receiver.


Happymodel ES24TX Pro Version:
BG Code: PARTS8 - https://www.banggood.com/custlink/D3DhbGFmTA
AE - https://s.click.aliexpress.com/e/_AeLqQf

Happymodel ES24TX (250mW)
AE - https://s.click.aliexpress.com/e/_Arc4Yx
BG - https://www.banggood.com/custlink/G3GhLFYp81

Video (EN subtitle) -
HappyModel ES24TX Pro 1000mW ExpressLRS 2,4GHz Modul (3 min 55 sec)


Starter Set ES24TX
AE - https://s.click.aliexpress.com/e/_ANT9cB

Moxon Antenna
AE - https://s.click.aliexpress.com/e/_A1BSGL

Cooling Fan
AE - https://s.click.aliexpress.com/e/_Ag931F

BetaFPV ELRS TX Module
Code: KOPTERHELD21BF - https://bit.ly/BFELRS24G



Inside a thick aluminum heat sink with fan

...Continue Reading
Posted by rickp | Nov 28, 2021 @ 05:24 PM | 18,370 Views
Was gifted a partially built CHT Albatross by a generous friend of mine, so thought I'd document the build and maiden.
The fuselage was mostly complete, with the exception of final placement of electronics, servos and pushrods.
The aileron wing was assembled, but lacking servos and pushrods. The polyhedral wing was unassembled.
Posted by PittSpecial | Nov 27, 2021 @ 09:33 PM | 23,289 Views
Okay,
As I type this tonight, there has been many USA distributors that have discontinued the Dynam line of RC EPP Jets that operate on 3, 4-cells with great results. It is my thoughts that it is perhaps the bigger picture to get more profit margin by the introduction of the larger and heavier EDF jets. These newer EDF jets require 6-Cells and capacities now range into the 5,000mAH (5.0 Amp-Hour) Lithium Polymers.

Hence, my beloved and discontinued "White" Dynam Turbo Twin 64mm EDF Jet that operates with just a 3-Cell, 2200mAH, 35C, Lithium Polymer still is operational today and I was lucky to find a true gentleman who sold me some hard to find parts for my Dynam Turbo Jet. (Picture attached).

A few have contacted me saying to provide a video showing the performance and most importantly the landing of this very nicely designed EDF Jet by Dynam so, here it is:

Dynam Turbo Jet 64mm EDF at Moon Port Edited 10 28 2014 (3 min 44 sec)

Posted by Old_Pilot | Nov 27, 2021 @ 06:13 PM | 24,087 Views
Das Ugly Glider - Part 3

Very productive day...and very pleased with the weight...got the fuse assembled and dry fit the tail section...I'll be darned if it doesn't look like a little Ugly Stik...The Tab-A-into-Slot-B method made the assembly so easy...I guess I'll start on the wing tomorrow