Herr Cloud ranger build - Page 3 - RC Groups
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Nov 28, 2010, 10:56 AM
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pda4you's Avatar
My first RC electric airplane, brings back many good memories.

A speed 400 geared and 8 NiCad cells. Those were the days.
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Nov 29, 2010, 11:49 AM
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tanner331's Avatar


I am Looking for the servos for the Throttle, Elevator, and the Rudder, What is a good servo match for the CR?
Nov 29, 2010, 11:52 AM
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pda4you's Avatar
Hitec HS55's, S-75's, S-90's and any other 8-9g servo.
Nov 29, 2010, 12:15 PM
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Sofa King's Avatar

- Operating speed (4.8V no load): 0.12sec/60 degrees
- Stall torque (4.8V): 10.2oz/in (2kg/cm)
- Temperature range: -30 to +60'C
- Dead band width: 4usec
- Operating voltage: 3.5-8.4 volts

$3.98 each shipped free
Nov 29, 2010, 04:32 PM
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surfer_kris's Avatar
It is not worth the potential trouble to use low end servos like the tower ones. For throttle it may do fine and then there is little damage when they fail, but not for anything else.
Better to use something like the HS-56HB instead.
Nov 29, 2010, 04:43 PM
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Sofa King's Avatar
i have used them for quite some time without any problems....but i can agree that a high end servo may be the way to go.....one less thing to go wrong.
Nov 29, 2010, 05:24 PM
Flying is an addiction
I use the cheap ones from hobby city/king. never had an in fight failure and field about 50 of them. HXT (I think is the brand). Only failures I've had are on my heli during a crash, 1 fixed wing failure when a control horn caught on grass and ripped the servo out of the wing.

I've lost 2 planes to two different hi end servos (elevator failure) in the last 3 years but not a single one to cheap servos.
Nov 29, 2010, 05:54 PM
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surfer_kris's Avatar
I tried a few of the HXT last year and lost a plane, so I'm a bit biased. To me it is not worth saving a few dollars initially, and plant a plane and loose hundreds of dollars...
Nov 30, 2010, 08:43 AM
Flying is an addiction
Originally Posted by surfer_kris
I tried a few of the HXT last year and lost a plane, so I'm a bit biased. To me it is not worth saving a few dollars initially, and plant a plane and loose hundreds of dollars...
this is a CR, with decent power and a proper place to fly (size wise) just loosing a servo isn't that bad as long as it doesn't hang in some dramatic position. if it returns to neutral you should be able to safely do a controlled crash with throttle only. having experience as a real pilot I would rather loose throttle less than any thing else, especially on an inherently stable airframe.

It's a stable design. I lost signal on my fpv once and had to let it do its own thing 1/4 mile away and completely out of sight. it landed its self in my neighbours back pasture, landed on the front wheel and broke the fire wall.

personally being a cop now, I couldn't afford to field all of my small planes on $20 servos. my big fire breathing monsters all have good, metal gear servos on elevator and ailerons, still cheap on the rudder, flaps, gear and throttle.
Nov 30, 2010, 09:01 AM
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surfer_kris's Avatar
Well I lost the elevator and did several consecutive loops until I reduced the throttle and nosed into a small river next to the field. I never want to be in that situation again, luckily this time no one was hurt...
Dec 08, 2010, 02:10 PM
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A question about CR weight:

I built a CR as a trainer to teach myself how to fly (in areas with no people and plenty of space). I have flown twice but both times the wind was MUCH higher in the air than it felt on the ground. The first flight the wind made the plan jump on final approach and I bent the gear a bit with a tumbling landing. The second flight I again found the wind was too high for the little plane, but as I came in to land and power down... I found the servo had jammed at mid throttle. I flew around at a little under half throttle to try and run it out of gas, but the plane was getting buffeted all over, and finally I lost control and crash landed entirely ripping off the landing gear.

So... to get to my point, I rebuilt it with a beefier gear and bigger tires, which looks and feels great, but it added quite a bit of weight to the plane. It now weighs in around 24oz. I have not flown it yet, but I'm wondering if anyone has flown a CR that heavy (or heavier) and if I should be concerned.

I think the extra couple ounces will actually help on breezy days, and I plan to set the ailerons down a bit for some added lift, but I don't want to have to land the thing at 30MPH. Any input would be appreciated.

Just realized power matters: it is running a Norvel .074, which seemed to be more than enough power for the plane at it's previous weight of 21.5oz or so... as proven by it staying aloft a less than half throttle on a windy day.

Last edited by nfsiv; Dec 08, 2010 at 02:18 PM.
Dec 08, 2010, 06:08 PM
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Sofa King's Avatar
i wouldnt think the extra couple ounces will hurt any....well.... as long as the plane still balances out or is slightly nose heavy....and it sounds like this would be the case as you have added the weight forward of the balance point....right?

.........with more than enough power from the engine i would think about adding to the prop if there is clearance
Dec 09, 2010, 04:25 PM
Registered User
Thanks SK. I figured I would be OK considering the listed stock weight with electric is listed as 22.2oz, and I have the added wing area of ailerons, but I'm glad you agree.

Glad to hear you favor nose heavy too. I actually had to remove weight from the nose (a stack of nickles glued into the engine mount... classy) after the rebuild, and now it is just a touch nose heavy, so there could be some frantic newbie trimming at the start of my next flight. And I just ordered a 7x3.5 prop per your recommendation (currently running a 6x3).

Oh, and I also added a secondary muffler (made out of a small spritzer can) which also added weight on the nose. I test ran it last night and it was amazing - the plane is so quiet I ran it in a small bathroom (for the exhaust fan) and it was quieter than my wife's hair dryer. It does not seem to impact power, but I will have to get outside with an RPM meter to test that theory. I will post pics and data when I get the chance.
Dec 15, 2010, 06:54 PM
kill your idols
ZEROSKIN76's Avatar


is it me or does the boom on your stealth sport not level with trust line

sorry like design just wondering, i believe ive gleemed enough info from photo to wanna find one of these kits it looks like it would be a demon with a os fp 10
Dec 23, 2010, 09:05 PM
Don,Browns Mills NJ
Hi guys i was thinking about getting a cloud ranger.I have a tt07 and a os fp10 sittin around.I have only built one other stick kit all my planes are arf type.So i have some questions on building.Is the fuse built with any epoxy or all ca?Thin ,med or thick ca?I was thinking medium on the fuse and thin on the wing parts. Epoxy to join the wing halves&engine mount .Thanks for any info from your experiences-Don

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