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Posted by Red.Sneakers | Nov 07, 2015 @ 09:20 AM | 1,005 Views

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I recently wrote a series of blogs about the motors used in the umx Sport Cub S2. Many folks have appreciated the data & information presented. Here are the links to blogs & forum posts that relate to the umx Sport Cub.

Does a 25C battery outperform a 45C =>

Sport Cub Stock Motor Benchmarks =>

My Micro Motor Warehouse Story =>

Micro Motor Benchmarks for Sport Cub =>

Micro Motor Battle: HH versus MMW =>

Good Bye Horizon Hobby =>

umx Sport Cub S2 ground school =>

Posted by Red.Sneakers | Nov 02, 2015 @ 08:57 AM | 1,058 Views

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Lipo battery safety is one topic that can never get too much press. We all need a Lipo Safety reminder every year. The Academy of Model Aeronautics has written a series of Lipo safety bulletins. Since everyone on RCG is not a member of the AMA, I thought I would share a quick reference summary & links on my blog.

The Articles

LiPo Battery Basics 1 – Safe Use =>

LiPo Battery Basics 2 – Transporting =>

LiPo Battery Basics 3 – Charging =>

LiPo Battery Basics – Disposal =>

AMA Emergency Safety Alert - Lithium Battery Fires =>

...Continue Reading
Posted by Red.Sneakers | Nov 01, 2015 @ 06:50 PM | 2,762 Views

AMA Members Speak Up

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The AMA should only deal with what is good for its members; therefore, they should only address section 336 as it relates to the new initiative to register Unmanned Aerial Systems UAS. AMA members operating a model aircraft within section 336 need to be separated from those operating outside section 336. Given that, they must demand the DOT/FAA recognize their status as a nationwide community-based organizations and specifically EXEMPT its members from any registration rule or regulation.

Only 4,436 comments have been sent to the FAA (aka DOT) as of 11:59 PM November 6. We need over 100,000 comments, so let’s get to work. Deadline is November 6 - it's over folks. Click here to submit your comment (leave your name & email blank and the comment will be posted on the public register as Anonymous)

Full exemption from registration of our UAS,
when operated in accordance with a community-based set of safety guidelines,
is the only end game we should accept.

Below is the comment I made to the DOT/FAA
Feel free to copy & paste or write your own


Public Law 112-95; 112th Congress “FAA Modernization and Reform Act of 2012'' section 336 states “the Administrator of the Federal Aviation Administration may not promulgate any rule or regulation regarding a model aircraft, or an aircraft being developed as a model aircraft, if …”

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Posted by Red.Sneakers | Oct 15, 2015 @ 10:47 PM | 1,525 Views

P-51D Mustang by HiTec

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I received the P-51D Mustang “Double Trouble Two” P2GO by HiTec as a gift from Pilot MnM for teaching her fly the Sport Cub S2. I had tried to fly a P-51 previously without success. I love the HiTec P-51. There is lots of room for the Rx, battery & a Gyro. Yes, I decided to hedge my bets on success so I installed an Eagle A3 Super II Gyro. If you are new to gyros, suggest you do your research to get familiar with the terms, read forums & ask for help. Once you know how to set them up for your plane, they can help you increase your plane’s Fun Factor. I like the fact I can switch between Stagility mode (release the right sticks in mode 2 & it will self-level). I set the bank angle to 45 degree max. Flip the switch to fly normally with the equivalent of AS3x to help with the wind or turbulence, flip back to stability for landings & takeoff or just to relax for a few seconds. I programmed my gyro using the PC as it is a visual interface. I attached the Gyro on the top of the wing and left the programming cord attached so I can make changes. Also installed a Bind port extension so I can rebind & set the fail safe without any hassles. The canopy has enough space for everything. With a 910mah battery, the CG was to my liking. They recommend a 1000mah or slightly larger battery.

As my friend, a retired RAAF pilot, said “Great looking P-51. I'll admit they are a handful, no matter what size, until you become
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Posted by Red.Sneakers | Oct 08, 2015 @ 08:01 PM | 1,776 Views

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WOW Wee, got to love it. So I called Horizon Hobby to tell them about the motors of the Sport Cub S2 (the $99 one) going bad prematurely. The Horizon Hobby representative said the motors are a wear & tear item. He offered to replace 1 motor out of the 4. I told him to keep his 1 motor & I would prefer to blog about my experience. IMHO, this is not a wear & tear issue as the original motors from the first batch of production went the distance. IMHO, this is a quality control issue. So what did it cost for 9 hours of flight time? Let’s see $10.99 + $2.99 shipping times 4 motors = $55.92. $55.92 divided by 9 hrs = $6.21 per hour of flight time. Heck, some days I do 1 hour of flight time in day. Now that is an expensive plane to maintain.

So what will I do?

- I will cancel my order for another Sport Cub S
- I will no longer give the Sport Cub S2 as a gift
- I will continue to buy the Micro Motor Warehouse motors
- I will shift my purchasing back to other brands
- I will write a letter to the CEO about their motor issue, na, figure not worth my effort.

I suspect my purchases in the future from Horizon Hobbies will be greatly reduced. In 2014 I spent over $2000 & in 2015 I have spent over $1200 so far, with Christmas still months away.

IMHO the Horizon Hobbies Customer Service representative up as he never asked me for my account information when he did his 'call-back'. I think he was in a hurry to complete the call-back as it was at the end of his day.

P.S. I remember the guy saying something like “I was asked to call back this number”. That tells me that they had a backlog of call-back calls to make & commissioned anyone in the office to make the call-back so they could close out their call-back backlog & go home. Closing out the ticket seemed more important than CS. It was not a typical CS dialog.

Good Bye Horizon Hobby!

Posted by Red.Sneakers | Oct 06, 2015 @ 03:46 PM | 2,418 Views

Beautiful Autumn day in Northern New Jersey. Winds light & variable, no turbulence, mild thermal activity, low UV index, temps in the mid 60’s F. Spent 4 hours at the Club, watching very accomplished pilots fly anything & everything fixed-wing electric. Strapped in a camping chair under the shade of a tree, Sport Cub S C9, with a new HH motor, ran through 6 batts for a total of 70+ minutes of airtime. Flight logger activated for the first two flights. First flight did a 360 foot spiral in 12 seconds (30.0 fps / 9.1 mps or 20.5 mph / 32.9 kmh). A full scale pilot said " that's a lot of G's" & waited for the wings to snap off. Second batt caught a thermal, dead stick glide for over 2 1/2 min, back up again into another thermal. Dead stick from altitude for over 3 1/2+ min spiral & glide to a perfect power off landing on the deck. Total flight time for batt #2 ~ 20 min 18 sec. Sustained winds on the last batt so did a bunch of 3D Elevator landings & STOL ROG to appreciative spectators. One of my mentors commented, "Red, I still remember the day when you would pack up your planes at the slightest hint of a breeze." Hum, I’ll call it the best day of the 2015 season.

Best Day for the 2014 Season
=> <=

Posted by Red.Sneakers | Oct 04, 2015 @ 01:36 PM | 2,328 Views

Air Show Atlantic 2015
Atlantic Canada International Air Show
Summerside Airport, Summerside, Prince Edward Island, Canada

Photos courtesy of photographer Tech Teacher

click ...Continue Reading for more pictures
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Posted by Red.Sneakers | Oct 01, 2015 @ 11:18 PM | 1,829 Views

Atlantic Canada International Air Show
Summerside Airport, Summerside, Prince Edward Island, Canada
August 22 and 23, 2015

Listen to the Leader call out “Now” & Narrow, Narrow” & “Tightening” to appreciate the precision.

Canadian Pride (6 min 0 sec)

Produced by Red Sneakers
Film courtesy of Tech Teacher
Reprinted by permission
No Creative Commons License

Posted by Red.Sneakers | Sep 13, 2015 @ 09:07 PM | 2,295 Views

I was hoping this was the year to learn to fly 3D, it will have to wait till next year.

In the meantime, a friend sent me some links to some good 3D training.
All in all, it is 54 minutes of instruction. Enjoy!

Michael Wargo How to Learn 3D episode 1 (15 min 43 sec)

Michael Wargo How to Learn 3D pt2 -"Throttle, Rolling and rolling harrier" (19 min 33 sec)
...Continue Reading
Posted by Red.Sneakers | Sep 03, 2015 @ 04:36 PM | 2,767 Views

Micro Motor Battle

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Let the micro motor battle begin. I have several umx Sport Cub S planes. After the Sport Cub motors started to fail way too early, I started to keep track of the number of flight hours each had lasted before failure.

Horizon Hobby Sport Cub versus Micro Motor Warehouse

Here are the standings so far
= = = = =
by Red Sneakers
Horizon Hobby Sport Cub motor
umx Sport Cub S
#01 ~ lasted 2.8 flight hours
#02 ~ lasted 1.6 flight hours
#03 ~ lasted 0.8 flight hours
#04 ~ lasted 3.7 flight hours
#05 ~ lasted 7.0 flight hours
[All my flights were mixed throttle control]

Micro Motor Warehouse motor
umx Sport Cub S
#01 ~ lasted 7.0 flight hours
#02 ~ lasted 7.0 flight hours

= = = = =
by liquidcourage
Horizon Hobby Sport Cub motor
umx Sport Cub S
#01 ~ lasted <2.0 flight hours
#02 ~ lasted <2.0 flight hours

Horizon Hobby umx Radian motor
umx Radian
#01 ~ lasted ~2.0 flight hours

= = = = =
by brokendiff
Horizon Hobby Sport Cub motor
umx Sport Cub S
#01 ~ lasted 2.9 flight hours
#02 ~ lasted 2.9 flight hours
#03 ~ lasted 1.7 flight hours
#04 ~ lasted 1.3 flight hours
#05 ~ lasted 0.2 flight hours
#06 ~ lasted 1.7 flight hours

= = = = =
by mupepe
Horizon Hobby Sport Cub motor
umx Sport Cub S
#01 ~ lasted 5.5 flight hours
[All my flights were slow usually just above half stick]

= = = = =
by Vulcaneer
Horizon Hobby Sport Cub motor
umx Sport Cub S
#01 ~ lasted ~2.0 flight hours
[Mixed throttle. But mostly half throttle]

= = = = =
For those interested in checking out the Micro Motor,
here is a direct link to the CL-0820-15-9T - coreless motor for micro planes
=> <=

Posted by Red.Sneakers | Aug 18, 2015 @ 11:55 PM | 2,382 Views

2015 Red Sneakers Airshow Fun Fly
Greenwood Lake Airshow
Greenwood Lake Airport, West Milford , New Jersey, USA

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. 2015 had a record breaking attendance of 31,000!

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Posted by Red.Sneakers | Aug 17, 2015 @ 11:31 AM | 2,523 Views

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

Buyer beware with the Sport Cub S stock replacement motors! see Good Bye Horizon Hobbies
=> <=

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 &
...Continue Reading
Posted by Red.Sneakers | Aug 09, 2015 @ 10:10 AM | 2,495 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.
...Continue Reading
Posted by Red.Sneakers | Aug 08, 2015 @ 02:05 PM | 2,646 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
...Continue Reading
Posted by Red.Sneakers | Aug 07, 2015 @ 09:10 AM | 2,616 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 &
...Continue Reading
Posted by Red.Sneakers | Jul 16, 2015 @ 11:52 AM | 2,348 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 @ 01:24 PM | 2,870 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

...Continue Reading
Posted by Red.Sneakers | Jul 12, 2015 @ 10:55 PM | 2,805 Views

2015 Mid-Atlantic Air Museum’s 26th Anniversary World War II Weekend
Reading Regional Airport, Pennsylvania, 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 @ 12:42 PM | 2,731 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
...Continue Reading
Posted by Red.Sneakers | Jul 03, 2015 @ 11:23 PM | 2,779 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, 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 ***