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Posted by Red.Sneakers | Aug 18, 2015 @ 10:55 PM | 1,363 Views

2015 Red Sneakers Greenwood Lake Airshow Fun Fly

Attended the Greenwood Lake Airshow this year with the family. Had a great time. The program was full of non-stop action. The performers put on an excellent show. New acts this year. Especially liked the Canadian Wing Walker, Carol Pilon & the Raiders Team. Heck we loved them all: Gary Ward; Red Line; FLS Microjet; Greg Koontz; Greg Connell; MegasaurusKevin Russo; Jerry McCart; US Marines; Medivac Heli. The sponsors, organizers & volunteers out did themselves.

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Posted by Red.Sneakers | Aug 17, 2015 @ 10:31 AM | 1,533 Views

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Sport Cub stock motor amp draw benchmarks for the umx Sport Cub S (SC) while in flight.

Conclusion: The Sport Cub stock motor consumes 3ma to 4ma less per minute than the Micro Motor Warehouse CL-0820-15-9T motor. I don’t know if having this much fun is against local ordinance but I got some smiles, waves & compliments while doing the ‘high speed’ testing

Flight plan was to stay close to the airport, no higher than 100 feet, oval or figure eight pattern and dead stick it to the nearest airport when the time expired. Total flight time 7 min. Timer set to 6:40 to allow 20 seconds to reach the runway. It was fun flying without throttle management, just controlling the speed to maintain altitude.

Here are some benchmarks to get you started when using a Sport Cub stock motor, with AS3x & SAFE active, so you can set your timer. The airplane was the SC with Grasshopper upgrade tires, SC motor & stock prop, and navigation streamers. Don’t forget to leave an allowance for Reserve fuel & fuel to return to home. If you want more info on setting your timer, see =>

A stock umx Sport Cub S fuel burn rate, in the air, should be approximately:

- Calm to light breeze with no turbulence: 14ma per minute at <45% throttle [low & slow]
- Calm to light breeze with no turbulence: 18ma per minute at 50% throttle
- Light breeze to breezy with no turbulence: 24ma per minute at 75% throttle
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Posted by Red.Sneakers | Aug 09, 2015 @ 09:10 AM | 1,412 Views

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This is the story of my journey testing the Micro Motor (MM) Warehouse CL-0820-15-9T motor on a micro plane. Originally intended for the Champ but eventually installed on the umx Sport Cub S (SC).

Conclusion: I love my MM on the SC. The performance is very good & consistent. Looks like the MM #01 still had some life left in it. Hitting LVC sooner than before seems to be a combination of slightly higher amp draw & weaker batteries. Having a reliable motor back on the SC is nirvana. In the future, I may do some static testing using a different prop to see if I can maintain the performance while drawing less amps. I have ordered the Eagle Tree voltage logger so I can do longer static tests, say 30 second motor run & get the battery / motor / prop performance data. Video "How to solder tiny wires" at the end. Related blog "Micro Motor Benchmarks for Sport Cub", click here

I went back & researched when I started thinking about using the MM. It was back in September 2014. I purchased two motors & asked a question of the company. The simple email turned into a warring opinionated exchange of words via email. We each responded with passion. To the company’s credit, they said if I did not like the product, to send it back & they would issue a full refund. Hum, that just seems too easy.

The MM philosophy is “October 01, 2014: We sell high performance parts for enthusiasts, they require a good amount of skill and knowledge. They
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Posted by Red.Sneakers | Aug 08, 2015 @ 01:05 PM | 1,645 Views
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Micro Motor amp draw benchmarks for the umx Sport Cub S while in flight

I don’t know if having this much fun is against local ordinance. Had to do some more testing of the Micro Motor (MM) Warehouse CL-0820-15-9T motor & batteries.

Conclusion: The MM is a nice option for those flying the umx Sport Cub S albeit it requires a higher amp quality battery to perform well. This is due to the higher amp draw at WOT.

Flight plan was to stay close to the airport, no higher than 50 feet, oval or figure eight pattern and dead stick it to the nearest airport when the motor started pulsing LVC or time expired. It was fun flying without throttle management, just controlling the speed to maintain altitude. Plus I got a “that’s cool” from a jogger passing by.

Here are some benchmarks to get you started when using a MM, with AS3x & SAFE active, so you can set your timer. The airplane was the umx Sport Cub S with Grasshopper upgrade tires, MM & stock prop. Don’t forget to leave an allowance for Reserve fuel & fuel to return to home. If you want more info on setting your timer, see =>

A Sport Cub with a micro motor fuel burn rate, in the air, should be approximately:

- Calm to light breeze with no turbulence: 18ma per minute at <45% throttle [low & slow]
- Calm to breezy with no turbulence: 21ma per minute at 50% throttle
- Windy & turbulence: 27ma per minute at 75% throttle
- Calm to
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Posted by Red.Sneakers | Aug 07, 2015 @ 08:10 AM | 1,618 Views
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Just when I thought I learned it all I had to go back to ground school. Having now flown my umx Sport Cub S for many months, experimenting with different batteries & now with a high amp draw motor, I noticed a lower “C” rated battery outperformed a higher “C” rated battery. So I asked a question to the RCG community. The answers were just too good not to archive in a blog.

Why does a 1s - 500mah 25C battery out perform a 220mah 45C battery with a motor that has a peak amp draw of 2.4 amp?

by turboparker
The reason is because all power sources have an internal resistance. The lower the internal resistance, the less voltage-sag there will be at a given current. In general - the higher the LiPo cell quality, the lower its internal resistance will be. Lower internal resistance = higher true C-rating. Factors that have a large effect on LiPo cell internal resistance include: cell construction & build quality, age (LiPo's start to die as soon as they come off the assembly line), number of cycles, depth-of-discharge, discharge current, operating temp, and storage conditions. That's the mechanism behind what we call a saggy pack. ALL packs sag to some degree as soon as you pull any current. It's Ohm's Law. The sag may be unnoticeable in flight at extremely low currents with respect to the pack's C-rating, but it's definitely measurable with a good meter. And because P=V^2/R, power output varies at the square of the voltage. Double the voltage &
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Posted by Red.Sneakers | Jul 16, 2015 @ 10:52 AM | 1,479 Views

Hope to go to the Greenwood Lake Airshow in 2015. Went last year with the family & had a good time.

2015 Greenwood Lake Air Show Commercial (0 min 31 sec)

Posted by Red.Sneakers | Jul 14, 2015 @ 12:24 PM | 1,944 Views

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Description: Trial # 3

Inspirited by mods made by other RCG members, I decided I would build a Champ Biplane.


Design #1 ~ Failed due to divergent Angle of Attack (AoA) between the top & bottom wing. Caught before the build got too far. One Champ fuselage trashed.

Design #2 ~ Failed. Looks good in the air. Close but no cookie. Wrong calculation on the Center of Gravity (CoG), and wrong decalage (rigging angle between a wing and the horizontal stabilizer). Four trials completed, 3 videos posted.

Design #3 ~ Calculate the new CoG & change the decalage. Result ???

Conclusion: Once you add a second wing, the dynamics of the Champ design are changed. A new CoG has to be established & if you keep the same AoA as the stock Champ, the decalage has to be changed.

Step # ..0 ~ Get parts from hanger or LHS, print template
Step # ..1 ~ Install top wing servos
Step # ..2 ~ Trim body & dry fit bottom wing
Step # ..3 ~ Install cockpit livery & top wing
Step # ..4 ~ Clip bottom wing by 3 inches, total
Step # ..5 ~ Glue clipped wing, test dihedral & add blenderm tape
Step # ..6 ~ Add livery to bottom wing
Step # ..7 ~ Add tail skid & wheels
Step # ..8 ~ Install, align & glue bottom wing

Step # 10 ~ Trim foam to give the servo gears clearance & add support
Step # 11 ~ Secure brick (note: if using a brick with AS3x or SAFE, make sure you install it at or close to the CG)
Step # 12 ~ Add lights, name, logo & other livery

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Posted by Red.Sneakers | Jul 12, 2015 @ 09:55 PM | 1,921 Views

2015 Mid-Atlantic Air Museum’s 26th Anniversary World War II Weekend
Reading Regional Airport, PA, USA
Photos courtesy of photographer brokendiff

MAAM's WWII Weekend is always held the first full weekend in June
next event: June 3-4-5, 2016
website =>

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Posted by Red.Sneakers | Jul 04, 2015 @ 11:42 AM | 1,810 Views

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June 12, 2015

morning, temps rising. Off I went to the Oval with my umx Sport Cub S2. Loaded the flight logger & 550 battery. Strapped in the chair under the shade. Calm winds at ground level. Just wanted to enjoy a relaxing 20 minute flight touring the field. Winds aloft were a different story, close to zero ground speed at half throttle could be achieved going upwind. Hung around 350+ foot AGL, short fast legs down wind and long slow legs upwind. No gusts observed. Squawking Tx indicating Frame Loses = 0, Holds = 0 every 30 seconds. Good communications with the radio reported, exceptional. The Tx telemetry squawking went silent for a while At 14 min I adjusted the flight plan to 17 min, followed by a power off glide to the gate. Never made it to 17 minutes, had to call a Mayday at 14+ minutes and institute a series of emergency procedures.

Hum, seemed to be going higher. I was on the downwind leg so I kept mid power setting. Oh my, it Was going higher, power off. AGL reached 772 feet. Then it happened, a cluster of pure white Cirrus Spissatus clouds moved in behind the SC. Puff, the Sport Cub was nowhere to be seen blended right into the cloud. Made a quick turn to try & get orientation. Saw what appeared to be a dark elongated spot. Must be the leading edge of the wing. Down elevator in what I though was a Return-To-Home orientation followed by a spiral. Puff, gone again! Held the down elevator for several seconds, said a prayer and leveled out, saw it for
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Posted by Red.Sneakers | Jul 03, 2015 @ 10:23 PM | 1,902 Views
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As every new month approaches I always wonder if I will have anything to blog about. Seems something always comes up, either an experience, introducing a new plane or based on feedback from RCG members. The reward for the effort is a PM or post that someone benefited from the blog. I limit myself to an average of 5 blogs per month. I have posted 85 blogs & like to think there is something for members that have a common interest. As the blogs age, it becomes apparent some are more popular than others. Age will kill the number of average community views per month, unless folks find it of value & share it. Best way to review the blogs is come back after the end of a month, scroll down to Archives & click on the previous month to view only the most recent entries. If you find a blog of interest, read & enjoy.

Top 4 Blogs

*** Spektrum Audio Editor ground school, click here ***

*** Flight Log Debrief Reports, click here ***

*** Keep Warm at the Core! U & the Batts, click here ***

*** umx Radian ~ Mods & more ..., click here ***

Posted by Red.Sneakers | Jun 25, 2015 @ 08:09 PM | 4,182 Views

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This discussion is a collaborative effort to develop a set of instructions & summary knowledge base for using the Spektrum Audio Editor.

Instructions for Downloading & Installing the Spektrum Audio Editor
================================================== =====
--> Download the Spektrum Audio Edited from here

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--> Save downloaded file to your PC Desktop
--> Double click on the Icon & follow the install instructions
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Posted by Red.Sneakers | Jun 17, 2015 @ 08:45 AM | 2,519 Views

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I present my EasySky Glider 1050mm ES-9909 Aerodone. This plane replaced La Belle Dame which also sported the high wing retro design. Once I get it all sorted out, I hope to mission this plane to take pictures & video during the season.

Overall flight experience is it is fast out of the gate & gets to altitude rather quickly. The glide is good. I have added a flight logger to get some data. It does drop quickly in sink so I would not classify it as a ‘floater’. It will thermal in light conditions. It performs well in breezy conditions.

You may want to also check out the discussion on "Windmilling a Fixed Pitch Prop" plane, click here

It requires up elevator on turns so currently I believe it is nose heavy. More flight testing with different CG points is required to find the “sweet spot”.

The plane was inexpensive during a HK sale, priced at $57, regularly $76 from the US warehouse. As a sub $100 plane, we can expect issues that need to be corrected & adjusted. I consider this part of the journey & allows me to save $ while implementing or learning new techniques.

Here is a summary of my build:

---> First thing out of the gate is that there is no active RCG forum I could find. So basically, I was on my own to figure things out.

---> Second, there is no mention of the CG in the manual. Best information I could find was “90mm from the point of the wing +/- 10mm” or “37mm from the front line”. Never found out what the “
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Posted by Red.Sneakers | Jun 14, 2015 @ 09:42 PM | 2,662 Views

2015 AMA District 2 Warbird RC Fun Fly, Trinca Airport, NJ, USA

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Posted by Red.Sneakers | Jun 12, 2015 @ 07:46 AM | 2,609 Views

Reno P-51 Racer ground school
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I present my Reno P-51 Racer aka Volantex R/C P-51D Mustang. For $59 plug & play, I just had to try it to see what I could learn. The build went very fast. Any issue I had was so minor it is not worth mentioning. First impressions is that it is well build & strong. My multiple attempts to maiden resulted in short flights & multiple crashes with the only damage being the wheels popped off cleanly landing on soccer field grass & 1 broken prop. Changed all three surfaces to 50% rate. Decided to make it belly grass landing aero. Finally got to fly it for 2 ½ minutes with a hot landing but no damage.
Time to reflect & debrief the sorie.

The debrief resulted in a consultation with a retired a Air Force pilot. Here are his comments:

Reference the Reno. If the aircraft can be flown level, hands off, it won’t be a CG problem. Remember, with the Stang (certainly the larger versions), a little nose heavy is a good thing - not a lot though- applied after trimming for level hands off (maybe one click of trim). The Stang needs power up in turns over about 30 or 40 degrees of bank. Try flying at 90% power, rolling into a 40degree banked turn and increase the power a little as it settles in the turn. Again, up elevator will be required in increasing amounts as the bank increases. In a level 60 degree turn, quite a lot of up elevator will be required (remember your vector physics from school!) At 80% of bank, you won
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Posted by Red.Sneakers | Jun 02, 2015 @ 03:06 PM | 2,906 Views

Sport Cub S2 ground school

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The umx Sport Cub S2 has turned out to be a very popular plane. Even won a 1st place award at the expo. Whether you enjoy altitude touring, slope soaring, wind surfing, low flights, indoors or out, it delivers a high Fun Factor for all. While it is rated by E-Flite as ‘intermediate’, a beginner can enjoy the benefits of the design & AS3x after getting a few tips from a mentor or doing their study of the blogs. Expert pilots are amazed by who well it performs. Here are some links for your ground school research.

Build Log: umx Sport Cub S2 =>

Setting up a DX6i ~ images of DX6i screen set up =>

Best method of initially trimming the Sport Cub [by turboparker]

Secure the Rudder before it's too late =>

Are you an Expert if you fly in Expert mode? =>

Hyperion 550 & Tail Skid =>

Tail Wheel Protection =>

Nothing but weights … =>

Wing Stress Marks =>

Fixing Wings Stress Cracks =>
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Posted by Red.Sneakers | May 16, 2015 @ 12:28 PM | 3,282 Views

LIPO battery ground school

New to using Lipo batteries, need a refresher or want to discover something new, here are links to various blogs with links to forum posts that may be of interest.

* * *
Lipo Voltage Chart, click here
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Keep Warm at the Core! U & the Batts, click here
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* * *
Disconnecting Ultra Micro Batteries, click here
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Posted by Red.Sneakers | May 10, 2015 @ 08:40 AM | 3,339 Views

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I present my first screamer, the umx Habu S DF 180 . I apologize to the purist, but I did not like the hard plastic pointed nose on the Habu with the possibility of spectators around so once the nose broke, I took off the plastic point & rounded the foam. Think it looks ok.

Lesson learned on the maiden flight: The Habu has a delay to get up to full thrust, it is not instant, so one has to manage the speed & lift on arrivals; I fly at a public park, so the Habu is grounded on weekends & mission him only to weekdays after 9am & before 3pm when most folks are at work.

Update: During my maiden flight, the Habu required a lot of up elevator in turns. Today I moved the battery back and it flew extremely well. Several arrivals with no crashes, just a lot of bouncing, lol.

Do a pre-flight check of your switches to assure the proper programming.
Contributed by RCG member TweakRacer
Note that the LED inside the Habu should go to:
-> solid amber for beginner mode & panic mode <-
-> flashing green for intermediate <-
-> solid green for experienced <-

In summary, I am very happy with my first EDF & will surely learn & grow with it.

Reinforce the nose wheel area & other mods, click here

Don't forget to read the manual for concepts that are new to you & programming the Tx, see attachment

join the discussion at RC Groups
=> <=
=> <=
=> <=

My first screamer the umx Habu S DF180 HD (1 min 27 sec)

E-Flite UMX Habu 180 DF Ultra Micro BNF with AS3X Technology Maiden and Review With a Flock of Birds (7 min 24 sec) Review - E-flite® UMX Habu 180 DF BNF Basic with AS3X Technology (13 min 30 sec)

E-flite UMX HABU 180 HD on board video (3 min 11 sec)

Posted by Red.Sneakers | May 05, 2015 @ 07:25 PM | 3,746 Views

So You Want to Thermal, do you
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An RCG member asked me a few questions when he got the umx Radian & wanted to learn to thermal. He thought the response was good for first time pilots to the umx Radian & those wanting to experience thermaling. So here are some of the basics to get you started.

Conditions change during flight, if it starts to porpoise, on the first porpoise encounter, just tap the elevator down to gain some speed. If it continues to misbehave, land it & adjust battery location.

The best conditions for a truly relaxing ride is when you have Nimbus Stratus clouds, there is stillness in the air & the sky is covered in a grayish color. In this condition, you have raising warm air over the entire field, so you will power up & the glide will be almost level no matter where you fly. I love it when I can find it. I have never seen lightning reported with Nimbus Stratus clouds but always check the current lightning radar to be sure as they bring rain or snow.

I agree with not flying close to an airport.

Before you get a strong thermal, go & practice putting it into a spiral & recovering. For the spiral, power off, full rudder / aileron. Be careful as I have had it descend at up to 50 feet per second . Let up on the control to soften the spiral. Recover into the wind or cross-wind pointing it towards you to slow it down. Descend rate will change with conditions. This will be your most
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Posted by Red.Sneakers | May 05, 2015 @ 10:48 AM | 3,298 Views

Why Help Support RC Groups?

If you are reading this, you probably already agree RC Groups is the best RC forum out on the market. So why help support the effort of the team with an annual $49.95 RCG Plus Paid Subscription? Yea, they tell you about the extra emails you can store & the fact that you can do multiple searches with seconds of each other, but who really cares about these features if you not an internet troll, government authority or advertiser wanting to do rapid data mining. Additional features are highlighted on the RCG+ Plus page, click here

I designed global systems in a past life & let me tell you, their design & implementation team is top notch. In today’s world where folks want to expedite everything, these guys have taken the time to design & implement a very versatile system, full of features & options. Oh did I mention they also believe in constant improvement. As reference, I have been known to crash systems on user tests. I have hit the RCG site ‘hard’ as a user & it has not waned once.

RCG has really provided a little bit for everyone, no matter what your interest, skill level or interest. User setting are many & diverse. Forums, too many to list. Blogs are ever changing, bursting with ideas & information. Make Friends with folks that have a common interest, select Friends on the Blog tab & presto, you only see those blogs. Classifies, well you can try to sell or give away almost anything.
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