Author Topic: Radio Controlled Aircraft (Read 1786 times)

z0rch · « **Reply #60 on:** March 27, 2006, 11:39:52 PM »

Quote

Hangtime:
Here's my 1/4 scale Piper L-21a.. it's got Video Downlink and live Telemetry to laptop that provides altitude, airspeed, GPSFix (moving map), engine cylinder temp and RPM, Fuel level, Voltage & Amperage, Stall warning. It'll operate LOS (line of sight) for sure.. haven't gone beyon 'dot' range yet.

Sweet! I want one!

1/4 scale is pretty big. What kind of engine does that run? Must be double-digit horsepower..

Chairboy · « **Reply #61 on:** March 28, 2006, 12:08:03 AM »

No need. Heck, the first Piper cubs had what, 20hp engines? Plus, balsa instead of steel frame, etc, and they weigh much less than 1/4 the weight of the original.

Hangtime · « **Reply #62 on:** March 28, 2006, 01:19:57 AM »

Close.. the 2 cyl Brownbach Tiger Kitten was 20hp.. and Taylorcrafts Kitten could barely fly. With no suitable engine for their plane the Taylor brothers went bankrupt and Piper bought the assets... in 1931 with the depression in full bloom. When Contenental introduced the 37 horse A-40, Piper put 'em in the Kitten and re-introduced it as the E-2 Cub. A few years later the plane was redesigned and upgraded, the J2 with Conteninbtal, Lycoming and Franklin engines. By 1940 the power was up to 65 horses in the J3, and they went to war as the L-4A.

By the time the Korean war rolled around a Super Cub was available.. with 150 horse Lycoming 0-320 flat 4.. the L-21 was the Army's version and it was no slouch... could lift anything they could close the doors on.

The model above has a 102" span (8.5 feet) weighs 18 pounds in tug configuration, 21 pounds with extended range tanks, full telemetry and camera loads. Total payload (lift capability deadweight and airframe) has been tested to 31 pounds.. cracked the gear on landing so I stopped loading more into it. The Zenoah G-38 gas engine the model flies on spins a 20" prop and rates at 2.3 ci and 2.5hp. Pretty scale power perfomance in the model. This bird see's a huge amount of airtime.. I've completely rebuilt it twice now; and expect to keep it operational as long as I possibly can. It's a great bird.

Goomba · « **Reply #63 on:** March 28, 2006, 08:01:34 AM »

Hang,

That is some top-flight building right there. Outstanding examples.

Anyone at your club ever build the BalsaUSA 1/3 scale Sopwith Pup? That was my big-scale foray, and she still flys somewhere. Actually, I found the building almost better than the flying (have I blasphemed now?).

Anyway...great work!

expat · « **Reply #64 on:** March 28, 2006, 08:47:38 AM »

My only crash to date was due to my own stupidity , decided to put a larger battery pack in this little foamy i had , well it climbed like a rocket , but once throttled back i found that the c of g was a tad tooooo far forward
(and here's me qualified to trim real aircraft!!!!!) any to cut a short story shorter the thing dived straight in to the side of a warehouse !!!!beeeg bang !!!!!(this is in Bahrain where r/c aircraft have only recently been made legal !)
I go to the ware house and knock on the door of the security guards shack , little Sri Lankan guy comes out , i tell him my r/c plane has hit his warehouse........10 minutes later the guy calms down , he was running all over shouting airplane crash !!! airplane crash........poor sod thought an airliner had hit his warehouse

..Anyway went to the scene of my crime ...Warehouse1 R/c plane 0....was totaled , the rear pod mounted motor had travelled through the plane , the nose once rounded now resembled concorde after a big drinking session...bent 90degrees down , the wing was now in bits and the battery was totaly gone!!!! just a few bits of plastic wrapping .......
Still had to laugh...airplane crash!!!!!!!! hahahahahaha

Hangtime · « **Reply #65 on:** March 28, 2006, 09:29:35 AM »

Quote

Originally posted by Goomba

Anyone at your club ever build the BalsaUSA 1/3 scale Sopwith Pup? That was my big-scale foray, and she still flys somewhere. Actually, I found the building almost better than the flying (have I blasphemed now?).

Anyway...great work!

Yup.. three of the big Pups in the club.. and two of the new 1/3 scale D7's! I'm lucky to be in the Skyhawks.. we've got 4 Top Gun winners, 12 places, about 30 total entries over the last 10 years... these guys can build and my stuff looks pretty pedestrian next to theirs. Most of those guys lend a whole new meaning to the term 'anal'... bitter arguments over rigging wire placements and number of stitches on leather cockpit coamings kinda stuff.

The big Pup's fly like trucks.. needs A LOTTA rudder and aileron cross control to avoid yaw. Spins real easy, recovery requires lotsa opposite rudder and a fair amount of throttle. Definitely gotta stay very alert when landing. Transport of the Pup's isn't to bad, full size vans work out fine. Setup is a bit tedious though. Good plane! The D7's seem to be a better flyers, little lighter on the same power (g-62). Really a treat watchin the 'Monsters Dogfight'.

Suave · « **Reply #66 on:** March 28, 2006, 09:35:31 AM »

I actually tried G3 in multiplayer yesterday. But without any structure or organization its just loud and really annoying.

Swager · « **Reply #67 on:** October 27, 2006, 08:16:36 PM »

Skuzzy, you have pictures of that F-15 yet?