Handley Page W8b Twin Transport

The model began life as an electric scale free-flight model. Span is 30", area of 240 sq. inches. Motors are 2 HiLine Mini-6 geared units. (the model was published in the Sept. '88 Model Aviation). As a free-flight it weighed a bit over 6 ounces with a 3 x 275mah NiCd battery. It was converted to RC originally using a 6 x 600mah NiMH pack , which weighed 2.7 ounces, and got 10 minute flights. Gross weight had increased to over 8.5 ounces. So I then changed to a 2 cell Kokam 1100mah battery which weighed 1.6 ounces. The resulting model weight was reduced over 1 ounce, performance picked up a bit , and flights of over 20 minutes are now possible.

MIG -15

The Mig started out as an electric free-flight model using a homemade fan unit (published in Jan. '95 Flying Models). It has a 24" span, and 150 sq. inches of wing area. As a free-flight model it weighed about 5 oz. With RC added, and a 7 x 270mah NiMH battery it grossed at 6.9 oz. It flew fine for 4 to 5 minutes. I then installed a 2x1100mah Kokam battery and saved about 10 grams. This change resulted in a slight boost in both power and performance, and now turns in flights of 15 to 20 minutes.

Lincoln All-Purpose

Originally was a rubber free-flight model, then converted to electric. free-flight . The span is 42" and wing area 285 sq. in. It was finally modified for RC using a 280 geared motor and employed a 7x280mah NiMH battery weighing 1.6 ounces.. Later the flight battery was changed to a 2x1100mah Kokam. Gross weight was reduced by about a half ounce to just under 10 ounces total. Flights of 25 to 30 minutes are possible.

Wildcat

The Grumman Wildcat has a span of 32 inches and an area of 165 sq. inches. Originally, my model weighed about 9 ounces with a GWS 180 type A geared motor and a 8 x 270mah NiMH battery. The battery was replaced with a 3 x 360mah Kokam battery , which saved over an ounce of weight. In addition performance is much improved and flight times of between 10 and 20 minutes are possible.

Kyosho Flash

My old Kyosho Flash EP uses a new Plettenberg Freestyle XL direct drive brushless motor. I used 4 packs of 3s Kokam 1200HC using the Parallel Connector module. This 3s4p configuration provides the voltage of a 10-cell NiCd pack and a total capacity of 4800mAh. My continuous current delivery can be 24amps with peak bursts up to 40amps. I used the 11.7oz Kokam pack to replace a 10-cell, CP1700 NiCd pack that weighed 16.8oz. I dropped 5.1 ounces and doubled my flight time using the Kokam Lithium packs. The Flash flew great before and now I can actually practice circuit aerobatics for a reasonble length of time without having to land just as I started having fun. - Freestyle XL direct drive brushless motor - APC 12x8 e-prop - Kokam 3s4p 1200HC pack

Wattage Extra 330L

In my Wattage Extra 330L, I replaced the 8-cell Kan 950mAh NiMH pack with 2 packs of 3s Kokam 1200HC using the Parallel Connector module. This 3s2p configuration provides the voltage of a 10-cell NiCd pack and a total capacity of 2400mAh. My continuous current delivery can be 12amps with peak bursts up to 20amps. Basically, I dropped 0.5 ounces, increased my voltage, and doubled my flight time using the Kokam Lithium packs. The plane flew fantastic! I had plenty of vertical power and it was the longest flight i've had on my little Extra 330L. - Mega 16/15/7 direct drive brushless motor - AeroNaut 10x7 black carbon prop - Kokam 3s2p 1200HC pack - RTF @ 24.0oz

Zagi Fixx

I used the MPI EPU3738 equivalent to the EPS-300C. It has a 3.75:1 gear ratio. My GWS 8x6 prop drew 6.7amps with my Kokam 2s2p 1020mAh pack. This looked just about perfect and it gave me a 2040mAh total capacity.   To mount the motor, I used a short post stuck into the GWS gearbox and epoxied it into a tunnel I cut just under the stock post. I also changed my ESC to a 10-amp rated device. - GWS EPS-300C (AS) 3.75:1 - GWS 8x6 prop - Kokam 2s2p 1020 pack

Wipa Firecat loaded with Kokams

My AXI-powered Wipa Firecat uses 4 packs in parallel of 3s Kokam 1200HC. The packs are easily connected in parallel using the Kokam connector blocks. Up to five packs can be plugged in parallel to increase capacity and current delivery capability. You simply solder on your output wire and connector of choice. For more details, go here. - AXI 282010 direct drive brushless motor - APC 11x7 e-prop, 8300 RPMs at 36amps - Kokam 3s4p 1200HC pack

.60-size Lithium-powered Extra 300S

The new Graupner Extra 300S was designed for glow power but easily converts to electric flight with very few changes. The Extra 300S has a large 63” wingspan, 46” overall length, 639 sq. in. wing area, and is ready-to-fly at 116oz. Using Kokam Lithium power, the flight times rival a glow-powered version. For more details, go here. - MaxCim 13D brushless motor - APC 15x10 e-prop, xxxx RPMs at 55amps - Kokam 5s5p 1200HC pack

Graupner ShowFlyer on 40 Kokams

The Graupner ShowFlyer is a great flying plane! My conversion project to electric power was very successful and it was also a great deal of fun. By providing the ShowFlyer with a clean and quiet electric power system, I was able to fly it just down the street from my home. The advantage of not using a glow engine will allow me to increase my practice time, since I can fly it more often, and learn some new 3D maneuvers. The 7.5AH capacity Kokam pack provides long flight times! For more details, go here. - MaxCim 13Y brushless motor - APC 20x11 e-prop - Kokam 8s5p 1500HD pack