Archive for August, 2014

Morgan RC Battery Cartridge

I went ahead and ordered and received the Morgan RC E-Flite Carbon-Z Cub Battery Cartridge.  There’s a risk ordering optional goodies for a plane because you’re not really sure if the plane will still be in one piece before you get the chance to use it!  Well, I took the chance because I see the immediate benefits it provides for this plane and it’s not just bling.

Small parts come packed in a zip-lock baggy.  No instructions are provided and you’ll need to supply a small bolt and lock-nut for the lock mechanism.  You’ll need to refer to the company’s website to  watch an assembly video to make sure you get it right. Thin CA is all that’s needed.  The video mentions that others have used wood glue and even epoxy but CA will do the job nice and easy.

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Note that the two wrench pieces differ from the assembly video and are actually the cartridge front and rear pieces.  The two holes are positioned at the bottom when installed. You use one of the holes for the cartridge gate.

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All of the laser cuts are crisp and clean.

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I used a 4-40 3/8 socket head screw with a washer and Nylok nut for the cartridge gate.

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Assembly took about 15 minutes following along with the video.  Everything aligned perfectly straight.

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Remove the existing mount and reuse the screws.  Installing the rack deck was easy as the mounting screw holes were perfectly aligned with the stock mounting holes.

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Now you have a one-handed operation to install and remove your flight battery without damaging the hatch opening and the hassle of dealing with the two Velcro straps in a confined space.  In addition, the extra long rack deck allows you to move the battery much further aft to shift some weight towards the tail which you couldn’t do with the stock mount.

All in all an excellent product.

 

 

 

Splendor

I did it again!  I really enjoy the Carbon-Z Cub and I like everything about it.  The Carbon-Z Splendor offers a different flying style and uses the same batteries as the Cub.  Assembly log coming soon.

Click here to read the assembly log

Key Features

  • Easy to complete, bolt-on final assembly
  • Exceptionally strong Carbon-Z™ wing and fuselage structure
  • AS3X® system for precision and agility without equal
  • Spektrum™ AR635 6-channel AS3X sport receiver installed
  • High-output, 50-size brushless Q-Power system installed
  • Digital high-speed, metal gear mini servos installed
  • Fully-hinged control surfaces with control links installed
  • Brilliantly finished, original Mirco Pecorari trim scheme
  • Plug-in wings and stabilizers
  • High-grade, socket-head hardware used throughout
  • Large access hatch with mechanical latch closure
  • Modern cockpit details and pilot bust installed
  • Efficient interior ducting provides generous component cooling

 

Overview

The E-flite® Carbon-Z™ Splendor® BNF Basic monoplane represents the pinnacle of performance and aerobatic versatility. F3A World Aerobatic Champion Quique Somenzini envisioned the Carbon-Z Splendor aircraft to deliver everything the modern world of precision flying has to offer, with not just the ability to perform elegant F3A sequence aerobatics, but extreme 3D stunts as well. In conjunction with the benefits of rigid Carbon-Z construction in the wings and fuselage, ground-breaking AS3X® technology built into the included Spektrum™ AR635 receiver makes it possible for you to experience unparalleled stability and a flight envelope wider than ever before possible.

 

Product Specifications

Wingspan: 54.5 in (1384mm)
Overall Length: 56.8 in (1443mm)
Wing Area: 645 sq. in. (41.5 sq. dm.)
Flying Weight: 5.50 lb (2.50 kg)
Motor Size: 50-size brushless outrunner
Radio: AR635 6-channel AS3X receiver (installed)
Servos: (4) 26-gram digital metal gear mini servos (installed)
Trim Scheme Colors: Red, purple and white
CG (center of gravity): 5.91 in (150mm) from leading edge at wing root
Wing Loading: 19.7 oz/sq ft (60.1 g/sq dm)
Prop Size: 14 x 7E
Spinner Size: 2.7 in (68mm)
Speed Control : 60-amp switch-mode BEC brushless ESC (installed)
Recommended Battery: 6S 22.2V 3200mAh 30C LiPo
Flaps: No
Retracts: No
Control Throw (Ailerons): Low: 80% up/down, 15% expo; High: 100% up/down, 15% expo
Control Throw (Elevator): Low: 75% up/down, 15% expo; High: 100% up/down, 15% expo
Control Throw (Rudder): Low: 60% right/left, 10% expo; High: 100% right/left, 20% expo
Approx. Flying Duration: 5-7 minutes
Minimum Age Recommendation: 14 years
Experience Level: Intermediate
Recommended Environment: Outdoor
Assembly Time: Less than 1 Hour
Is Assembly Required: Yes

 

Needed to Complete

– A full-range 5+ channel DSM2®/DSMX® transmitter with adjustable dual rates and exponential
– 6S 22.2V 3200mAh 30C LiPo flight battery
– Charger capable of charging 6S LiPo batteries

calculation

What you need: A Watt Meter and Power Analyzer that measures peak Amps and Watts like: a Watt’s Up or Turnigy

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After logging the various measurements you can use these simple calculations to estimate your planes performance and to make sure that you are within the limits or your ESC and motor. Very helpful when experimenting with different prop sizes to find the right performance you’re looking for.

Let’s use these two examples of peak Amps and Watts taken with my Watts Up on my Carbon-Z Cub:

Peak Amps at full throttle = 56

Peak Watts at full throttle = 1,333

With just these two numbers we can determine expected length of flight time, watts per pound and the equivalent internal combustion engine horse power.

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To determine the expected length of flight time, you’ll need the peak amps at a set throttle position and the battery capacity in milliamps:

The calculation is: Battery capacity in mAh divided by amps x 60

The result is: Flight time at full throttle = ~3.54 minutes

Of course you may not fly at full throttle the entire flight so take several readings at various throttle positions to help determine an average.

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You can determine the expected flight performance based on the peak watts and the weight of your plane:

The calculation is: Watts divided by plane weight

The result is: Watts per pound = 157

Use these Watts Per Pound values to help determine if you have the power to match your needs:

  • 50-70 – Minimum level of power. Think Park flyers.
  • 70-90 – Trainers and slow flying scale planes
  • 90-110 – Sport / aerobatic and fast flying scale planes
  • 110-130 – Advanced aerobatic and high-speed planes
  • 130-150 – 3D and ducted fan planes
  • 150-200+ – Unlimited performance 3D and aerobatic and larger ducted fan planes

Bear in mind these are industry related  de facto numbers and I find that in the real world they are not all that reliable.  Use them as a starting reference point.

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You can also estimate your electric motor performance compared to an internal combustion engine

The calculation is: Watts divided by 746

The result is: IC equivalent = 1.8HP