SIMON CRAGG Posted December 7, 2020 Share Posted December 7, 2020 I have just purchased a Hobbyking Voltageur, which has an unbranded 4028/1000kv motor and a 45a unbranded ESC. This runs on 3s, swinging a 13x4e prop. The set up is a bit gutless!. I have installed an 80a ESC and 60c 4s Lipo, but am struggling to establish what is the next step up from the supplied motor? Can anybody suggest a suitable motor? Nothing to outlandish please!. Quote Link to comment Share on other sites More sharing options...
Shaun Walsh Posted December 7, 2020 Share Posted December 7, 2020 Hi Simon, Can you check the motor can diameter and the distance from the back of the motor mount where it is attached to the firewall and the front of the motor, not including the shaft.? If you post the sizes it should be easy to find a suitable upgrade. Edited By Shaun Walsh on 07/12/2020 13:29:22 Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted December 7, 2020 Share Posted December 7, 2020 13 x 4 prop, is that correct, Hobbyking specs show a 12 x 8, a 13 x 4 will make the plane fly quite slowly and also draw fewer amps. Have you measured the current draw on the "current" setup? Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted December 7, 2020 Share Posted December 7, 2020 I know nothing about this model other than what it says on the Hobbyking site but the prop pitch looks very low. Have you tried it on 3S with something like the recommended 12 x 8 or 13 x 6.5? Perhaps try reducing the diameter by a couple of inches if you use the 4S but keep the higher pitch. If the motor is no good you have little to lose by trying - just make sure the ESC isn't overloaded although if you stick with the 80A there's not much likelihood! (Apologies for any duplication Frank - I was looking at the HK site while you were posting!) Edited By Martin Harris on 07/12/2020 13:41:25 Quote Link to comment Share on other sites More sharing options...
Colin Carpenter Posted December 7, 2020 Share Posted December 7, 2020 Just a heads up. Club mates new Volti crashed on maiden. No idea why. Rebuilt and crashed again on flight 2. Turned out to be the esc packing up after 4 minutes or so. New esc and still flying. Colin Quote Link to comment Share on other sites More sharing options...
Shaun Walsh Posted December 7, 2020 Share Posted December 7, 2020 Wouldn't advise 4S, see the video below where someone has flown a Voltigeur on 4s and managed to fry 2 ESCs. The stock motor displaced a magnet and stiffened up causing excess current draw. Voliteur 4s battery problem Quote Link to comment Share on other sites More sharing options...
Shaun Walsh Posted December 7, 2020 Share Posted December 7, 2020 If it will fit, this might work. 4-Max 3541-920 I have the 1070KV version which is rated to a lower max current draw pulling 37A on a 3S in a 1500g Riot. It will climb vertically and roll whilst doing it but probably needs a bit more power for 3D stuff. The 920 version is rated to 45A WEP Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted December 7, 2020 Share Posted December 7, 2020 Posted by Shaun Walsh on 07/12/2020 13:44:33: Wouldn't advise 4S, see the video below where someone has flown a Voltigeur on 4s and managed to fry 2 ESCs. The stock motor displaced a magnet and stiffened up causing excess current draw. Voliteur 4s battery problem I believe the OP has already uprated to an 80A ESC. Quote Link to comment Share on other sites More sharing options...
Shaun Walsh Posted December 7, 2020 Share Posted December 7, 2020 Posted by Martin Harris on 07/12/2020 13:53:38: Posted by Shaun Walsh on 07/12/2020 13:44:33: Wouldn't advise 4S, see the video below where someone has flown a Voltigeur on 4s and managed to fry 2 ESCs. The stock motor displaced a magnet and stiffened up causing excess current draw. Voliteur 4s battery problem I believe the OP has already uprated to an 80A ESC. The problem wasn't the ESC, it was the motor failing when run on 4s and as a result both ESCs fried. Quote Link to comment Share on other sites More sharing options...
SIMON CRAGG Posted December 7, 2020 Author Share Posted December 7, 2020 Posted by Shaun Walsh on 07/12/2020 13:29:03: Hi Simon, Can you check the motor can diameter and the distance from the back of the motor mount where it is attached to the firewall and the front of the motor, not including the shaft.? If you post the sizes it should be easy to find a suitable upgrade. Edited By Shaun Walsh on 07/12/2020 13:29:22 Can diameter 3700 Motor length 4628 I read elsewhere, that the Turnigy SK3 3542/1250 kv is a good replacement, along with the Surpass 3548-1100kv. Quote Link to comment Share on other sites More sharing options...
SIMON CRAGG Posted December 7, 2020 Author Share Posted December 7, 2020 Posted by Frank Skilbeck on 07/12/2020 13:29:35: 13 x 4 prop, is that correct, Hobbyking specs show a 12 x 8, a 13 x 4 will make the plane fly quite slowly and also draw fewer amps. Have you measured the current draw on the "current" setup? Came with both. Hovering manouvres are easier with a larger diameter fine pitch prop. Back in the day 4" Wide props and 12x3.75 props used to be the go to airscrew. Quote Link to comment Share on other sites More sharing options...
SIMON CRAGG Posted December 7, 2020 Author Share Posted December 7, 2020 Posted by Shaun Walsh on 07/12/2020 13:44:33: Wouldn't advise 4S, see the video below where someone has flown a Voltigeur on 4s and managed to fry 2 ESCs. The stock motor displaced a magnet and stiffened up causing excess current draw. Voliteur 4s battery problem I saw this, hence changing the ESC for an 80 a job!. Quote Link to comment Share on other sites More sharing options...
Shaun Walsh Posted December 7, 2020 Share Posted December 7, 2020 Posted by SIMON CRAGG on 07/12/2020 14:03:13: Posted by Shaun Walsh on 07/12/2020 13:44:33: Wouldn't advise 4S, see the video below where someone has flown a Voltigeur on 4s and managed to fry 2 ESCs. The stock motor displaced a magnet and stiffened up causing excess current draw. Voliteur 4s battery problem I saw this, hence changing the ESC for an 80 a job!. If you can barely turn the motor by hand as in the video I dare say it would fry even an 80A ESC The SK3 3542-1250 looks a good bet, 3S battery, 11x7 prop, 47.6A, 2300g thrust. Quote Link to comment Share on other sites More sharing options...
Shaun Walsh Posted December 7, 2020 Share Posted December 7, 2020 Even better, there are 2 versions of the SK3 3542-1250 one for front mounting and one for rear mounting. Edited By Shaun Walsh on 07/12/2020 14:24:38 Quote Link to comment Share on other sites More sharing options...
SIMON CRAGG Posted December 7, 2020 Author Share Posted December 7, 2020 Posted by Shaun Walsh on 07/12/2020 14:11:46: Posted by SIMON CRAGG on 07/12/2020 14:03:13: Posted by Shaun Walsh on 07/12/2020 13:44:33: Wouldn't advise 4S, see the video below where someone has flown a Voltigeur on 4s and managed to fry 2 ESCs. The stock motor displaced a magnet and stiffened up causing excess current draw. Voliteur 4s battery problem I saw this, hence changing the ESC for an 80 a job!. If you can barely turn the motor by hand as in the video I dare say it would fry even an 80A ESC The SK3 3542-1250 looks a good bet, 3S battery, 11x7 prop, 47.6A, 2300g thrust. Seems about the best so far, this is the first "3D" type model I have had powered by electric. The kv values are a bit confusing!. I realise its got to be quite a high KV to swing a fun fly type prop, but how high is the question. Ideally, I would like to stay with 3S, but not at the expense of performance. I have plugged in various props using e.calc and the 11x7 came out at 1.73:1 58a and 2602g thrust. 12x8 was a bit ott @ 75a and 3141g thrust!. Edited By SIMON CRAGG on 07/12/2020 14:32:12 Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted December 7, 2020 Share Posted December 7, 2020 I agree about the 13 x 4 prop for hovering, but as the model only weighs some 1500g you should be getting very lively performance on a 3s battery with a 1,000 kv motor. Have you measure the battery volts under load, yesterday my plane with an 1100 kv motor and 11 x 7 prop on 3,000 mah 3s lipo started off at 26 amps and very quickly dropped to 15 amps as the ESC LVC was cutting back the power, possibly because the batteries were too cold, or the batteries have gone faulty! Quote Link to comment Share on other sites More sharing options...
Dickw Posted December 7, 2020 Share Posted December 7, 2020 What rpm do you want from your 13x4 prop? Once we know that choosing a kV for 3s should be easy. Do you know what rpm you are getting now on the ( "gutless" ) 13x4 on 3s? Dick Edited By Dickw on 07/12/2020 15:06:36 Quote Link to comment Share on other sites More sharing options...
SIMON CRAGG Posted December 7, 2020 Author Share Posted December 7, 2020 Posted by Dickw on 07/12/2020 15:05:45: What rpm do you want from your 13x4 prop? Once we know that choosing a kV for 3s should be easy. Do you know what rpm you are getting now on the ( "gutless" ) 13x4 on 3s? Dick Edited By Dickw on 07/12/2020 15:06:36 Ideally 10k plus. No idea about previous rpm............gave up on it! Quote Link to comment Share on other sites More sharing options...
Dickw Posted December 7, 2020 Share Posted December 7, 2020 Posted by SIMON CRAGG on 07/12/2020 15:33:02: Posted by Dickw on 07/12/2020 15:05:45: What rpm do you want from your 13x4 prop? Once we know that choosing a kV for 3s should be easy. Do you know what rpm you are getting now on the ( "gutless" ) 13x4 on 3s? Dick Edited By Dickw on 07/12/2020 15:06:36 Ideally 10k plus. No idea about previous rpm............gave up on it! For 10k plus you are going to need something like a1200 or 1250 kv motor on 3s. Dick Quote Link to comment Share on other sites More sharing options...
SIMON CRAGG Posted December 7, 2020 Author Share Posted December 7, 2020 Posted by Dickw on 07/12/2020 15:53:27: Posted by SIMON CRAGG on 07/12/2020 15:33:02: Posted by Dickw on 07/12/2020 15:05:45: What rpm do you want from your 13x4 prop? Once we know that choosing a kV for 3s should be easy. Do you know what rpm you are getting now on the ( "gutless" ) 13x4 on 3s? Dick Edited By Dickw on 07/12/2020 15:06:36 Ideally 10k plus. No idea about previous rpm............gave up on it! For 10k plus you are going to need something like a1200 or 1250 kv motor on 3s. Dick Looks like its going to be the SK3 1250KV then!. Quote Link to comment Share on other sites More sharing options...
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