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Old Sep 07, 2001, 09:15 PM
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klingberg wing

I'm building a 100 inch klingberg wing ,
i figure it will come out to 6.5lbs to7.0 lbs.Anyone got any suggestions about motor
gear ratio,and prop.Any suggestions would be greatly appreciated. THANKS ALL
AL
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Old Sep 11, 2001, 08:13 AM
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Re: klingberg wing

You're going to need about 300 - 320 watts at the prop. This is not my kind of model at all, but if I had one myself I would be thinking of something like two Speed 600 8.4v (most likely the 'Race' versions) on 2.5:1 gearboxes with 10x6 props. I would have each motor 'see' 10 cells and decide if I had 10 or 20 cells when I knew which way the weight was going.

I don't know the US motors too well, so I couldn't recommend which motor would be best if you only wanted one motor. If I was using my usual German stuff, I would be thinking of going at the very least to a geared Ultra 930-7.
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Old Sep 12, 2001, 07:13 AM
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You got any picture of your wing?
Alex
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Old Sep 12, 2001, 05:00 PM
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klingberg wing

chrisp, thanks for the input. twin motors are out! it's already
setyup for a single motor. I'm will give your suggestions some
real thought.
Alex no pic's yet it's about 70 percent complete.
thank's guy's Al
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Old Sep 12, 2001, 09:10 PM
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What makes you think it will be so heavy? I thought the Klingberg wings had a very light wing loading. How much area will it have? Are you wanting something high performance or do you want to get to altitude in a reasonable ammount of time and search for thermals?
Adam
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Old Sep 14, 2001, 03:42 AM
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Re: klingberg wing

Quote:
Originally posted by viperjet
chrisp, thanks for the input. twin motors are out! it's already
setyup for a single motor. I'm will give your suggestions some
real thought.
Al
OK, if you're stuck with just one motor and you need, say , 300-320 watts, you should be searching for a motor that will pull something like 30-35A on 12 cells. At an efficiency of 65-70% this would give you what you are looking for. This is only a tad above what you could get out of a Speed 700 9.6v, but it's so close it might be well worth looking at as a low cost option.
Graupner has a 2.7:1 (?) gearbox for this motor, so it would be easy to find a suitable set up. I have Speed 700's in two models and they pull like a Kenworth truck, only smoother !

I really think I would give this a try.

Lots of luck !

Chris

PS - I presume it's a pusher. Make sure the prop blades cannot fold further inboard than straight back or you risk shaking the model apart when one blade unfolds under power and the other not !
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Last edited by ChrisP; Sep 14, 2001 at 03:59 AM.
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Old Sep 14, 2001, 08:26 AM
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Quote:
Originally posted by ChrisP
This is only a tad above what you could get out of a Speed 700 9.6v, but it's so close it might be well worth looking at as a low cost option.
Graupner has a 2.7:1 (?) gearbox for this motor, so it would be easy to find a suitable set up. I have Speed 700's in two models and they pull like a Kenworth truck, only smoother !
Al, isn't that the answer you were looking for? Do you think you'll have it ready for <a href=http://www.dvrc.org/events/efly01/efly01.htm target=blank>the Devil Mt. meet</a> in a couple of weeks, I hope so? It may be worth calling Kirk to see if he has one of these gearboxes. Good luck, see you in a few! Bring your entire airforce down with you.
Greg

<img src=http://www.dvrc.org/events/efly01/Image5.gif>
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Old Sep 14, 2001, 12:56 PM
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adam, the klingberg wing is 41/2lbs asa gider .Add 21/2 lbs batteries'plus motor &gb plus esc . = 7lbs+
chris thanks for the info. I have a speed 700 9.6 v bb .
according to NC catalog the GB's they have won't fit the
BB motors . IFi can go to the 700 ican save some weight
in batteries. thanks for the info and feedback it's greatly
appreciated. Al
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Old Mar 12, 2005, 09:24 AM
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Klingberg

Are there any of these left? I would like to find a 100" plans or kit.
Brian
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Old May 06, 2015, 05:52 PM
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100" Klingberg E-Sailplane

I thought I would resurrect this thread which obviously was started in the dark and distant days of brushed motors.
I have a KW 100" which I plan to use as an e-soarer for sport flying only, unless it proves to be competitive, which I doubt , but we shall see.
I think about 400-500W should be adequate, and I am looking toward a Hacker A30 geared in a tractor configuration, on 4S with a 16" folder to provide "GO".
I have chosen the tractor configuration for two reasons; the first is ease of launching, no prop to slice unwary hands at launch. Secondly I think the power system will replace some of the lead required for balance.
If anyone has any experience with a similar set-up I would be pleased to hear any useful comments.

Iain
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