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› raptor 90 tandem to electric question
01-12-2009 07:05 PM  9 years agoPost 1
ady

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norfolk england

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at present my raptor 90 tandem runs on a os 91 hz , if i was to convert this to electric what set up could any one recommend , its never gonna do 3D but does pull the engine down under load , so a 4hp electric brushless should do .my pocket isn`t bottomless so any budget type kit will be looked at greatly indeed , just a thought , thats all , thanks

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01-12-2009 07:33 PM  9 years agoPost 2
JamieD

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Salt Lake City UT

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conversion
http://www.runryder.com/t472249p1/
it will not be cheap
I have been checking into it myself reading the other guy's posts
2 Thunder Power 5000 battery packs are $600
CC HV110 speed controller is about $225
Scorpion motor is about $170
so just that much is $1000

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01-12-2009 07:53 PM  9 years agoPost 3
ady

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norfolk england

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oh la la , shall not bother for sure , cheers for that fella ,will build a 50size electric tandem instead

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01-14-2009 05:06 AM  9 years agoPost 4
DKNguyen

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N/A

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Anything wrong with a 450? Tech Model Products has a kit they made using T-rex rotorheads.

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01-14-2009 05:10 AM  9 years agoPost 5
SuperSixTwo

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Virginia City, NV ---USA

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Just like eating an elephant, one piece of a time. Figure on what you want, and move towards it. Price? yeah its tough but a nice tadem 90 size electric would be awesome!

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01-14-2009 05:46 PM  9 years agoPost 6
ady

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norfolk england

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fair enough , could there be some set ups put forward , i may actually put smaller blades on the tandem to ease the load , say 680mm instead of the 710mm its got now , a HV controller , 2 times 6s packs in series ,so 12s , i`ll see what brushless 90 size i can find and post for your ideas , as for the 450 , i`ve not had one of those to comment on i`m afraid , thanks ady

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01-14-2009 07:51 PM  9 years agoPost 7
HeliCSR

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Hesperia, Ca, US

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Lets See It
Lets see a picture, dont just tell us about it, and make us drool......
Even with OS 91, see it see it.

I fly and then I fly some more.
If it don't glitch then I won't crash.

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01-14-2009 09:05 PM  9 years agoPost 8
ady

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norfolk england

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here she is , very early stages at present

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01-14-2009 09:06 PM  9 years agoPost 9
ady

rrKey Veteran

norfolk england

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http://uk.youtube.com/watch?v=xs9T35mxFCI&fmt=18
a little video of the third flight

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02-08-2009 04:16 PM  9 years agoPost 10
R38133

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USA

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WOW make sure this does not happen to you http://www.youtube.com/watch?v=QyF6dFoMac4&NR=1

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02-20-2009 04:22 PM  9 years agoPost 11
"Cam"

rrKey Veteran

UK

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How does the yaw control on tandems work??? Do you use opposite cyclics? If so doesn't that just try to twist the chassis!?

DSX9
EMax V2
http://runryder.com/helicopter/gallery/37491/

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02-23-2009 01:22 PM  9 years agoPost 12
ady

rrKey Veteran

norfolk england

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yaw works by tilting the swashes in opposite directions , this does try to twist the chassis , and on my current tandam rex it twists quite a bit , have now fitted extra bracing to help prevent this

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