Funtana 90S

Hangar 9 Funtana 90S (Electric conversion)

Standard Hangar 9 kit (upgraded a bit).

Motor;             Hacker A60-M 16turn, 215RPM/volt

Controller;            Hacker Master 90-0-ACRO

Power;            2 X Hyperion Litestorm 3700 5S1P

Prop;               18 x 8 APC thin electric. 

Projected flying weight 6.00 kilos  

Actual flying weight 4.95 kilos 

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First Electric Funtana

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Upgraded wing

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Hacker A60-M motor & Master 90-0-ACRO ESC

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Hacker motor mounting

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Empty fuselage bays

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2 X Hyperion Litestorm 3700 5S1P

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Cooling air exits

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Batteries installed

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in flight success at last

This is my second attempt at an electric Funtana and my fourth Funtana model in all. My current IC version has not got of the ground due engine problems and lack of interest.

Model is made from parts from a few models  plus rebuilt front end, it has a very upgraded wing (see photo) with diagonal bracing ribs and vertical braces to the ribs having been added to overcome flutter problems of previous models. Ailerons servos upgraded from JR 811s to Hitec 649MGs this seems to have cured all flutter problems.  

Undercarriage has been upgraded to a composite carbon type to give greater ground clearance for prop.

  The original plan had been to use 20 cells (10S2P), an initial 5 minute test flight was flown with a 10S1P, this proved more than adequate power and on recharging only 1.4 amp/hrs was needed to charge the battery. I have subsequently worked up to 10-minute flights. Even approaching 10 minutes there is enough power to pull vertically out of hovering flight, with about .4-.5 of an amp/hr left in the batteries.  

Using only 2 battery packs instead of 4 has saved 20% in weight, which accounts for he models performance. I choose the Hyperion Litestorm 3700 5S1P because 4 packs would fit nicely between the bulkheads just behind the wing joiner.  

The cowl has only the air inlets as supplied but I opened up the holes in the front bulkhead and put light ply around the battery bay, with vents in the bottom of the fuselage none of the electric bits get more than warm during a ten minute flight.  

I will probably upgrade the servos further to the same as used on my IC Showtime JR 8411s on ailerons and rudder with JR 8231s on elevator. Also I must make the top decking quicker to remove and replace to make the batteries more accessible.  

Model has now had over a dozen flights without incident and am working up to complete my BMFA Achievement scheme C" certificate with it in the not to distant future.

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Gloucester Model Flying Club