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Power Systems Talk about motors, ESC speed controllers, gear drives, propellers, power system simulators and all power system related topics

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Old 11-18-2012, 08:59 PM   #1
raaf
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Default Engines/improvements or substitutes for kit

http://www.sparclaser.com.au/sparc_a...catalogue.html

Bristol Beaufort


Hi,

I am after recommendations for replacement parts for this kit, specifically:

Engines recommended:

Twin electric (2x) Multiplex 700BB Ferrites - seem to be out of production
with Multiplex 3:1 Gearboxes

12" x 8" Master electric propellers

Battery recommended:
14x 2000mAh cells

To date I haven't had much luck and I am finding the differing engine size systems confusing.

I would appreciate some idea of what I can use to substitute for these - informative help sites or any other advice.

Probably outrunners but very new to this


Thanks
Mick
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Old 11-23-2012, 04:40 PM   #2
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Welcome Raaf

Brushless motors in the 25 to 32 size would be where I would start looking. For a battery use a lipo with 4, 5 or 6 cells. More cells equal less amps for the same watts. What is the flying weight? with a plane like that to build I would use MotoCalc and work out the system with the most efficiency.

It looks like an awesome model.

Terry

Flying is like ... ah well ... I can not think of anything it is like...
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Old 11-23-2012, 04:58 PM   #3
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I must say, there are some very nice kits at the site you provided. High quality. What was the flying weight for this plane? You'll have an endless list of sources for motors including HK and Leaders Hobby.

Wounded Warrior Fun Fly - Aug 16th ,2014 - Grapevine TX - Info link: https://support.woundedwarriorprojec...ising/RCPilots
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Old 11-23-2012, 09:01 PM   #4
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Thanks guys - I have been to a lot of sites but I am just a little insure of myself at this stage. I will keep looking around and have a good look in the brushless 25/32 size. Weight unknown at the moment as they are still sourcing the plywood.

Dad flew Beauforts in the Pacific during WWII so I am very keen to get this one right :-)

Thanks again Guys !
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Old 12-04-2012, 05:28 PM   #5
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Something like this seems about right to spin 12x8's on 4s... you probably only need around 300W per motor.... but some to spare is always good. If you come in at 4lb, 150W/lb should be more than enough.

http://www.hobbyking.com/hobbyking/s...ner_710kv.html
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Old 12-05-2012, 06:23 AM   #6
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Thanks Dr.at least now I can look to the other bits I need :-)
Thanks again !!
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