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Post by Dillzio on Aug 25, 2009 5:07:17 GMT 1
Hold on, cubster has said twice that the prop size on both versions of the super cub is 9x6 (LiPo and NiMH), but if I understand correctly, flydiver is saying that the old posts are right in quoting the 10x8 prop as being stock because that's what they used before the LP. So who's right? Oh, and thanks for the tip flydiver that the pitch and length numbers may not necessarily correspond to power. I guess the brand, style and material of the prop make a difference too. Only sure way to know is to get a wattmeter, or to try really hard to get some people from this forum to test some of these cheaper props from www.hobbycity.com/hobbycity/store/rc_propeller_configuration_page.asphobbyzone 9x6 hobbyzone 10x8 jxf 8x8 master airscrew 8x7 TGS 8x7 APC style 8x6 GWS 8x6 master airscrew 9x7 GWS 9x7 master airscrew 9x6 APC style 9x6 JXF 9x6 SF E-Prop 9x6 TGS Sport 9x6E gws 10x6 JXF 10x6 JM 10x6 JXF 10x7 TGS sport 10x7 Turnigy Electric Ultra-light wood propeller 10x7 GWS 10x8 Turnigy Electric Ultra-light wood propeller 10x8 JXF 10x8 Master Airscrew propeller 10x8 (electric only) They're the ones i've picked out that I think should be OK for a super cub. Some are a bit small, but it would be really interesting to see the comparison. What do you say guys, PLEASE? |
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Post by flydiver on Aug 25, 2009 5:30:54 GMT 1
Try flying a Cub on 9x6 and 7-cell NiMh. It might taxi if you kicked it at full throttle.
BTW, unless they cleaned up their act and cleaned up their molds the HC 'clone' props look good and are TERRIBLE. Finish is awful and balance is almost unbelievably rotten. I assume the Turnigy are in this category too. Most are just clones of APC.
Master Airscrew look pretty, are tough, and have mediocre foils.
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Post by ginginho on Aug 25, 2009 8:51:12 GMT 1
Hold on, cubster has said twice that the prop size on both versions of the super cub is 9x6 (LiPo and NiMH), but if I understand correctly, flydiver is saying that the old posts are right in quoting the 10x8 prop as being stock because that's what they used before the LP. So who's right? {snipped} They're the ones i've picked out that I think should be OK for a super cub. Some are a bit small, but it would be really interesting to see the comparison. What do you say guys, PLEASE? WRT the stock prop on the original cub, it is definately a 10x8. On the metering question, I'd love to help Dillzio but I'm on a brushless setup now, so it'll be comparing apples to oranges. TBH I think you may struggle to find someone who is using stock components who has a wattmeter. Although the advice all round suggests getting a wattmeter most don't bother and when they do, it's generally after they've swapped out the stock electrics and are then concerned with what power the new setup is using. It took me quite a time to get round to buying a meter, it's now an invaluable tool. |
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Post by Dillzio on Aug 25, 2009 15:24:04 GMT 1
Ah, yes, valid point. Most people who have stock setups are on a somewhat tight budget, and thus don't buy something like a wattmeter unless they really need it, and as stock setups don't require wattmeters...
Perhaps if someone has an old stock gearbox and motor it would be possible to make up a bench rig to test it on?
The stock 450 brushed seems to have heaps of power on Lipos as it is, I can't imagine what I'd do with any more power!
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Post by flydiver on Aug 25, 2009 17:01:15 GMT 1
Perhaps if someone has an old stock gearbox and motor it would be possible to make up a bench rig to test it on? Did you read the beginning of this thread? It's there for you. |
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Post by Dillzio on Aug 25, 2009 18:43:02 GMT 1
Perhaps if someone has an old stock gearbox and motor it would be possible to make up a bench rig to test it on? Did you read the beginning of this thread? It's there for you. I'm really not sure what you mean by that comment mate. I've just read the thread three times and can't see any reference to making a bench rig out of a stock gearbox and motor. What exactly are you referencing? |
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Post by flydiver on Aug 25, 2009 19:10:37 GMT 1
RichT did the measurements on Stock props (older 10x8 version) using lipos and NiMh along with a MAS 10x6. Thought that's what you were after. It's not a bench rig I assume, he probably did it on a the plane. If you are after thrust data from a more sophisticated setup I doubt you'll find it in this forum. Once folks dump their brushed motor they never look back. If they are using stock stuff they are not likely to have a wattmeter or a bench setup. There are only a few people doing stuff like that. That along with the Ampaviator link are about as much as you are likely to get. If you think you like info of that sort spend some time in this forum. Pay particular attention to postings by Dr. Kiwi. He's one of the local experts. www.rcgroups.com/power-systems-13/If I'm interested in a motor my first check is that forum to see if anyone has done some real testing on it. Frankly I don't trust hardly any of the published specs from almost any site. Time and again they've proven to be inflated or merely copied from one link to another. The less expensive the motor, the more likely to be this way. |
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Post by Dillzio on Aug 26, 2009 5:29:53 GMT 1
Ah, thanks for the tip :-)
At the moment I'm more interested in what props you can put on the stock setup safely. If I found one that provided more thrust than the stock 9x6 but drew less power, i'll probably buy about 20 of 'em.
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