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Old Feb 09, 2008, 05:54 PM
hondaboy92hatch
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United States, WA, Vancouver
Joined Feb 2005
725 Posts
Build Log
Build log Great Planes Viper 500

Hi all, I plane on doing an e conversion of the great planes viper 500. I need to know of a good motor inrunner or outrunner to swing no bigger than a 10 inch prop. specs of the plane are 52 inch wing and 500 square inches. Weight will be around 3-3.5 pounds hopefully I can get it lighter. I wan to build somthing to pylon race with shhhhh. I want to hit aroung 100-120 mph shhhh will want to go 150-180. I need a reccomendation for a 4 cell set up to keep it light. I need a motor that is capable of producing 700-1,000 watts and high rpm.

Thanks in advance for any help.
Joe
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Old Feb 09, 2008, 06:08 PM
Yes..ok..maybe..lol.....
Tucson Avra Valley, Arizona, United States
Joined Jul 2004
5,729 Posts
I think a 5s set up would be better.....45 to 50 amps at 16 to 16.5 volts.
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Old Feb 09, 2008, 06:16 PM
hondaboy92hatch
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United States, WA, Vancouver
Joined Feb 2005
725 Posts
-

ok well we will see what happens. I wanted to stay as light as possible. I think this will make a great plane.
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Old Feb 12, 2008, 07:23 PM
Ritewinger
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Jacksonville, Florida
Joined Dec 2005
255 Posts
Any updates?

Cameron
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Old Feb 12, 2008, 08:36 PM
hondaboy92hatch
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United States, WA, Vancouver
Joined Feb 2005
725 Posts
viper 500

I ordered the kit it should be here Friday. This is my plan. two hitec 225 carbonite servos mega 22/30/4 6s tenergy pack dynam 80 esc ubec and a 9/9 apc pylon prop. Please anyone feel free to jump in as far as props go. I am set on motor esc and lipo due to haveing it on hand. the pack is a 2200 6s 30c so should be good for 60 amps.
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Old Feb 14, 2008, 03:59 PM
hondaboy92hatch
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United States, WA, Vancouver
Joined Feb 2005
725 Posts
update

Hi all,
I brought the viper kit home today first impressions were the kit in general was well packed and had generouse hardware. The only thing I didn't like about the kit is thw wing is very heavy. I need to get a new battery for my scale. but it feels like it weighs at least a pound. I have started assembly and I am useing a Hitec hs 225 mg for ailerons and a futaba 3102 mg high torque for the elevator. waiting for the motor and lipo. if everything comes in I will get to maiden this beauty next weekend.
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Last edited by hondaboy92hatch; Feb 14, 2008 at 05:45 PM. Reason: add picture
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Old Feb 14, 2008, 08:18 PM
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United States, CA, Rancho Cucamonga
Joined Mar 2003
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don't use the stock wheels , they will fall off on the first or second landing , garrunteed.
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Old Feb 14, 2008, 08:33 PM
Ritewinger
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Jacksonville, Florida
Joined Dec 2005
255 Posts
Would a power 46 and 4s 4200mAh work?

Cameron
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Old Feb 14, 2008, 09:16 PM
Registered User
Inman, South Carolina
Joined Jan 2008
15 Posts
Viper off shelf and on bench! Supplied wheels replaced (thanks PylonDave!) Should be a fun plane if given enough oompah. Great idea Joe.
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Old Feb 14, 2008, 09:31 PM
Yes..ok..maybe..lol.....
Tucson Avra Valley, Arizona, United States
Joined Jul 2004
5,729 Posts
Pylon Dave: Exactly what wheels should Joe get? I May get a chance to fly this Viper. I am just not used to having any wheels on a pylon racer!!
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Old Feb 14, 2008, 09:53 PM
hondaboy92hatch
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United States, WA, Vancouver
Joined Feb 2005
725 Posts
viper

Pylon Dave what wheels should I use? Dave you will get a chance to fly this plane. wings west wait two weeks I am working with Rich from Vision Hobbies to get an outrunner that will spin a 9/9 apc pylon prop at 20k or better. More pictures next week. Bab I might have to fly out there after I finish this thing so we can race or find time after the shoot out to race. Very nice chatting with you and look forward to using the battery.

Joe
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Old Feb 15, 2008, 08:30 PM
hondaboy92hatch
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United States, WA, Vancouver
Joined Feb 2005
725 Posts
just about done.

The Viper is just about don. Auw so far is 42 oz at the moment waiting for motor and motor battery. Equipment used so far Hitec hs 225 mg servo for ailerons futaba 3102 high torque for elevator MPI voltage regulator Thunder power 900 7.4v lipo. Hi Rich from Vision Hobbies if you would be kind enough to do it please post the motor and weight that you had told me about. Bob Sadler if you would please post the weight of the flight pack. Thanks to all that are interested. and I hope to make my 3.5 pound limit.

Joe
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Last edited by hondaboy92hatch; Feb 15, 2008 at 08:31 PM. Reason: -
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Old Feb 16, 2008, 01:57 AM
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United States, CA, Rancho Cucamonga
Joined Mar 2003
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you can get pizza cutter wheels and axles from Darrolcady.com or pspec.com or from Jett engineering and supertrc.com.
They look the same as the ones you get with the viper but better quality.
all the viper wheels fall off . trust me!! poor design.
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Old Feb 16, 2008, 01:59 AM
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United States, CA, Rancho Cucamonga
Joined Mar 2003
760 Posts
The current weight minimum for Q500 is 3 3/4 pounds. They fly well at that weight.
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Old Feb 18, 2008, 06:23 PM
hondaboy92hatch
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United States, WA, Vancouver
Joined Feb 2005
725 Posts
more progress on the viper

Hi all I am at a waiting point now. All I need is the motor and flight batery.
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Last edited by hondaboy92hatch; Feb 18, 2008 at 06:27 PM. Reason: ad pictures
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