Posted by benjamin presten | Today @ 12:29 PM | 63 Views
How many retractable gear parasols can you think of? Probably not very many. In 1931 the Army Air Core was looking for a new observer and Curtiss had a unique solution. A monocoque all metal swept wing sesquiplane with a 650hp Wright Cyclone named the YO-40 Raven. The prototype was completed and flown in February of 1932 but it was wrecked shortly thereafter in May of the same year. Back to the drawing board, Curtiss rebuilt it with stronger wings. They also added full canopies as opposed to the open seating for two of the initial version. Nearly satisfied with the new “YO-40A” the Army Air Core ordered a further four of them with a few modifications. Curtiss delivered on this order with four shiny new “O-40Bs” this time with no lower wing. The upper wing, now with retractable slats and flaps, was braced to the landing gear hard points with V style struts. They had also replaced the engine with the newest version of the Wright Cyclone, now making 670hp. In June of 1933 the four flying O-40Bs were delivered to the 1st Observation Squadron. No more O-40s were ordered sadly and the four airplanes were retired and presumably recycled in 1939....Continue Reading
Posted by J0972 | Today @ 11:05 AM | 135 Views
Here is an overview video of my 1/24th scale Monster Truck. I will be upgrading it and starting a new build soon. Hit subscribe and turn on notifications if you want to follow the progress.

Micro RC Monster Truck Part 2 (5 min 58 sec)

Posted by GroundControlRC | Today @ 08:07 AM | 234 Views


Eachine Micro SkyHunter 787mm PNF - Get the SonicModel Kit & Components I've Listed - It's Awesome!

Get One Here: Sonicmodell Micro Skyhunter 787mm Wingspan EPP Kit
https://www.banggood.com/custlink/3vKEIPoNau

Racerstar Racing Edition 2205 BR2205 2300KV 2-4S Brushless Motor Red for 220 250 RC Drone FPV Racing - Clockwise Screw Thread
https://www.banggood.com/Racerstar-R...47791920140372

Htirc Hornet Series 12A 2-4S Brushless ESC With 5V/2A BEC
https://www.banggood.com/Htirc-Horne...47791920140372

4X SG51R 5g Plastic Gear Digital Micro Servo
https://www.banggood.com/4X-TowerPro...47791920140372

10pcs Gemfan 6030 ABS Direct Drive Orange Propeller Blade
https://www.banggood.com/10pcs-Gemfa...47791920140372

Banggood GCRC
https://www.banggood.com/custlink/GmDmQ1nVkO

Here is a link to the Video:
https://www.youtube.com/watch?v=uwh9uYWFjh4

You can help support us by using our affiliate links to the products above. A small commission (At No Cost To You) helps us buy more items to review.

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#EachineMicroSkyHunter #MicroSkyHunter #SkyHunter #GroundControlRC #GlueAndFly #GCRC #GFS #ScratchBuildPlanes


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Ground Control RC™ Glue & Fly™ Series Scratch-Build Planes

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Posted by benjamin presten | Today @ 06:13 AM | 300 Views
In 1932 the search for a monoplane fighter for the US military was in full swing. In December the Navy had ordered a new low wing monoplane from Boeing. However, Northrop was leading the pack at the time with high performance low wing ships. They had the already had huge success with their Alpha, Beta, Delta and Gamma monoplanes. In May of 1933 Northrop got their chance in the form of an order from the US Navy for one prototype fighter to be designated the XFT-1. Northrop eagerly got to work on its new single seat ship and in December it took to the air. Powered by a 625hp Wright Wirlwind, it had a design that looked a bit like a shrunken down gamma. It maintained Northrop’s signature wing and spatted, fixed landing gear design. It was constructed entirely out of metal using a stressed skin construction method. With a top speed of 235mph it was a good performer as well as a good looker. However the Navy said that it exhibited severe tail buffering in spins and it had extremely poor handling at slow speeds with a very poor forward visibility. In 1935 it was returned to Northrop for major modifications. It received new larger tail feathers and a new Pratt & Whitney R-1535 of 650hp. It was delivered back to the Navy in 1936 with the new designation XFT-2. The Navy was happy that it went faster, but disappointed by the fact that it flew even worse at low speeds. They deemed the airplane unairworthy and abandoned their interest. On the flight back to Northrop, the airplane was destroyed in a spin accident in the Allegheny Mountains. While it didn’t win a contact, it certainly had good looks going for it.
Posted by Jack Crossfire | Today @ 03:40 AM | 372 Views
The next tire was designed to be perfectly smooth for maximum silence & used about a buck of material. The treaded tires already had trouble gripping plastic surfaces, but lions are desperate for anything to reduce the noise. It was still slightly stiffer than the stock lunchbox tires, but very compliant. The mane problem is the desire for a round surface to reduce wear & friction.

For the round surface to be compliant, it needs to expand axially & compress radially. If it was flat, it would only need to compress radially. Not connecting the spokes to the entire outer surface was an attempt at axial expansion, but it's still very stiff where the spokes do connect. Only a curved sidewall would truly allow axial expansion & radial compression, but a curved sidewall is hard to print.


More ideas are transitioning the spokes to a different axis near the tread. Unfortunately, TPU only becomes compliant if it's curved on 1 axis. If it's simultaneously curved on 2 axes into a dome, it becomes very stiff. The dual spoke idea gets pretty ugly & still has problems.

There's also connecting the spokes only in the center of the tread.
Posted by AtomicMilk | Today @ 12:32 AM | 481 Views
I get bored with box art and I don’t like stock decals, so I’ve been painting a lot this week. First my chevelle body for the vintage S&K. .. then a cheap Walmart toy car that I use in the living room, and then today I painted a beat up grasshopper body.

Here’s the...Continue Reading
Posted by xplaneguy | Yesterday @ 08:20 PM | 678 Views
Successfully maidened two of my foamy glow conversion aircraft, last weekend. Good times!

Here's the flight videos:
MG-800 R/C Glow Conversion with AP Wasp .061 Engine (6 min 56 sec)

SD Models Condor with Cox .049 Medallion Engine (7 min 3 sec)
...Continue Reading
Posted by Old_Pilot | Yesterday @ 07:54 PM | 651 Views
Phase II of shop/CNC refit....new 25x56 combo vac/t-bolt cleat table
Posted by Justwingit | Yesterday @ 06:56 PM | 719 Views
Here's a fine example of a collaborative effort between Callie and a very skilled modeler...

This is Brent Hecht's rendition of Blue Angels #5 using a Freewing A-4 Skyhawk as the base model :
Freewing A-4 Skyhawk 80mm EDF Jet - Blue Angels #5 by Brent Hecht (6 min 5 sec)


Brent spent many, many hours priming, sanding and then priming and sanding again before final paintwork to achieve this very glossy finish. Callie's custom made markings finished off the project perfectly !


Posted by UpNup | Yesterday @ 05:00 PM | 883 Views
If you read my blogs, you’ll learn that I typically make a plastic 1:48 scale model of the RC plane that I’m building.

I finally found a 1/48 scale Tamiya F-15 C that has the right tail flash FF from Langley/Elgin AF base. If you’re not familiar with the plastic modeling world, Tamiya is known for excellent scale authenticity, exacting fit, and finish quality. And to seal the deal, I saved $10 by purchasing thru eBay’s app. The only catch is it’s coming from Hong Kong in about a month. However, I found the Tamiya manual and painting guide online. The plastic kit was made in 1991, but it is pretty close to the 1986 version I’m modeling.
Posted by benjamin presten | Yesterday @ 03:32 PM | 955 Views
Near the end of the war, the army was after a new observation/liaison/ambulance airplane. Piper took on the challenge by highly modifying their J-5. Starting with the wings, they added full length leading edge slots and long flaps that extended to 60 degrees. In the fuselage they added a large greenhouse with windows running the majority of the way down the fuselage and a large upward folding hatch to store a litter for patients. In the landing gear department they added an extended gear leg and ditched the bungees in favor of a large shock strut going all the way up to the upper longeron allowing for 12 inches of travel. Lastly they added a custom built Lycoming O-290-1 of 130hp with a Sensenich wood prop. Piper was granted a Type Certificate in July of 1945 for the “Piper L-14 Army Cruiser” and they subsequently produced five new airplanes and completed the two prototypes to production standards. These seven airplanes were presented to the Army for testing and evaluation. With the requirements satisfied, the Army ordered 850 airplanes. Lycoming delivered their order of 850 engines and production of the airplanes commenced in August of 1945 however it was immediately halted when the army canceled the order. The only part of the contract completed was 9 fuselages. When the war ended, Piper was given back their seven completed airplanes and they finished the nine fuselages they had built in a “civilianized version”. All 14 of the completed airplanes were sold off, many of...Continue Reading
Posted by benjamin presten | Yesterday @ 01:15 PM | 1,106 Views
The Early Days at Ryan:
In the 1930s, San Diego was home to a hub of aviation development. In 1927 Charles Lindbergh flew across the Atlantic in a Ryan NYP that was designed, built and test flown in San Diego where Ryan was based. Ryan had become a household name in aviation thanks to the fame of this flight. With their sales taking off, Ryan continued to develop more and more advanced aircraft. Just after Lindbergh's famous flight Ryan took aim at the commercial market with several variations of the Ryan Brougham, a 5 place commercial airplane developed from the M-1 and NYP. With the sales success from the 212 expensive Broughams produced spurring them on, Ryan next took aim at the sport flying and training market. In 1934 and 1935 Ryan began producing the 2 seat ST series. Powered by an inline four cylinder Menasco the Ryan ST-A was a sleek design with tandem seating and controls for two. With a Ryan ST-A winning the 1936 nation aerobatic championship at the hands of Tex Rankin, the airplane grew quickly in popularity.

A Grand Plan:
In 1937 the Great Depression had ended and people were finally spending money again. However, with the price of the ST-A set at $4500 (north of $82,000 in todays money) it was certainly not what most people would call an attainable sport flyer for the average person. Enter Claude Flagg and his associates. A group of 11 engineers and mechanics who worked for the local companies Ryan and Consolidated, both based at Lidbergh field in San Diego,...Continue Reading
Posted by DutchRC | Yesterday @ 12:08 PM | 1,012 Views
Halloa people

got me yet another brand new Diatone quad here! That's always (well most times) very nice ofcourse
It is again a light-weight quad and "L3" seems to suggest it is supposed to be a Long Range quad..
To me it seems more of a speedy cruiser though

Link to it: Diatone Roma L3 with Caddx Nebula Pro cam.

Feel free to add Your experiences / questions / thoughts about the quad!
I'll be posting a few video's about it..

Diatone Roma L3 with Caddx Nebule Pro - First Look + Flight Test (12 min 35 sec)


Specifications:
type: Long Range / Cruiser
wheelbase: 146 mm
base thickness: 3mm arms. 1.5mm plates
material(s): Carbon Fibre + allu parts + TPU
dry weight:
flight controller: Mamba F411 AIO
firmware version: Betaflight 4.2.5
ESC's: Mamba 25A AIO Blheli_S
motors: Mamba TOKA 1206 3600 Kv
propellors: HQ 3 x 2.5 x 3 & HQ 3 x 1.8 x 3
FPV camera: Caddx Digital Nebula Pro
VTX: Caddx Digital Vista air unit
GPS: nope
Lipo: 650 mah - 850mah 4S (not included)
OSD: provided by Betaflight / DJI
smart Audio: DJI Digital FPV
buzzer: Yes, and installed
LED's: nope
spare props: 2 different sets included
Posted by pvtzemerak | Yesterday @ 11:14 AM | 1,044 Views
Took me longer than expected to finish my Protos 380. I got all the parts in a week or so ago but wasn't able to do any adjusting due to the Vbar USB Port Location and the small size of the 380 frame. I ended up having to cut off the plastic housing of the USB chord to get it to fit. The rest of the build went fairly smooth and the Hawk-RC Blade grips added a nice touch to the head giving it a more "premium" look compared to the stock plastic blade grips.

The only gripe I have with the kit is the tail. Even with the upgraded metal casing and slider, there isn't a lot of room for error and I had to play with tolerances and bolt torque to be able to get the slider moving freely without any binding. There is a lot of mechanical gain on this tail just by design, so make sure to use a servo horn/wheel that has holes as close to the spline as possible and set your gyro gain low. It took me 10-15 flights of tuning in the vbar system to get this heli flying somewhat smooth at 2500-2800RPM. Anything above that and I get a violent tail wag. I attempted to work it out but stopped trying due to how perfect this little heli fly's at 25-2800RPM, you really don't need to go any higher.

The flight performance of these 380's is beyond what I was expecting coming from .50 sized machines 6 years ago. The Heli feels just as "locked in" as larger machines and is very stable. The drivetrain is obnoxiously quiet thanks to the belt-driven transmission and tapered profile on the AzurePower Blades. Not bad for a $200 kit - I really can't see justifying spending more on other 380 sized helis.
Posted by ShonanBeachRC | Yesterday @ 08:46 AM | 1,109 Views
Working on my Tamiya TT-02B neo-scorcher! It's coming along quite nicely!

More on my website: https://www.shonanbeachrc.com/rc-car...uild%ef%bc%81/
Posted by URNOTDOWN05 | Yesterday @ 04:35 AM | 1,408 Views
I’m having trouble with my Bezgar 1. When I turn it on it goes on reverse on its on. Then when I set the throttle going forward it works fine and steers fine. But when I try to reverse it won’t go. Anyone know what will be the problem. Thank you in advance
Posted by old_coastie | Yesterday @ 02:17 AM | 1,542 Views
Why I haven't been active on RCG threads in a few days....

Uhhhh!!!! I got distracted...


Blame it on Covid-19...

First of all as some are aware of just coming out of a Covid 19 situation here, and praise the Lord, everybody came through with out any harm. (Incl. Me )

But since I was on quarantine my mind started to wander, and then fixed on the stupidest thing/idea... Saw this piece of foam packing and it was all downhill from there.

Anyway the entertaining part first, and then more details if anyone is interested, sure as heck not gonna waste a lot of time putting together something if I'm the only one looking at it, but then again I have a very low "outside" interest level, so leave a comment, I can't say no to sharing info if someone asks.

o_c

Whirlygig Proof of Concept and Redemption - Uncut (6 min 24 sec)


Whirlygig Submarine (2 min 19 sec)
...Continue Reading