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[DHutch]

I have bought a 36" x 6"  (910x150mm)TID class tug, although I don't have it with me yet.

Currently fitted with a 6v Decaperm and 60mm four bladed prop, no esc or radio gear with the boat, prop pitch is unknown.

Looking to replace the motor with a newer and likely direct drive option, new esc and batteries. Pretty much a clean slate.

Obviously its not a speed boat, certainly not a planning hull form, but I am not concerned about maintaining accurate 'scale speeds' etc.
Predominate use will be at inland boat festivals and on local canals and rivers. Although we do also have a few local boating lakes here on the Wirral.

Thanks in advance.

Daniel

[Fastfaz]

  Hi,
       I would suggest an MFA 800 motor, Quickrun 1066 ESC and SLA 12 volt battery. If you look on "Merseyside by the sea" youtube for the boats crashing video you will see a Naval style tug running this system, Andy's helmsmanship could do with some improvement though  . Hope this helps.
       Cheers, Pete.

[DHutch]

  Hi,
       I would suggest an MFA 800 motor, Quickrun 1066 ESC and SLA 12 volt battery. If you look on "Merseyside by the sea" youtube for the boats crashing video you will see a Naval style tug running this system, Andy's helmsmanship could do with some improvement though  . Hope this helps.
       Cheers, Pete.

One of these for  MFA 800 £25
 - 12v 4280rpm, 5.3A 36W 595g
https://www.componentshop.co.uk/800-dc-motor-mounting-bracket.html.html
And if you found that wasnt the beast, the MFA 850 is a straight swap to roughly double the rpm.
 - 12v 8311rpm 10.8A 80W
https://www.componentshop.co.uk/850-dc-motor-mounting-bracket.html.html


HobbyWing Quicrun 1060 for £23
- Current; 60A Cont.  360A Peak
- Input; 2-3S LiPo/6-9 Cells NiMH (or 12v SLA)
https://www.modelsport.co.uk/product/hobbywing-quicrun-1060-brushed-waterproof-esc-sbec-404964

Thanks

[DHutch]

If you look on "Merseyside by the sea" youtube....

Oh, I like that a lot! You're also only an hour away from us here on the Wirral which is nice. Might have to come down with the boat some time soon.
https://www.youtube.com/@MERSEYSIDEBYTHESEA/videos

[Martin (Admin)]

Also have a look on ebay for at: 775 3500-9000RPM Large Torque High Speed Motor Gear Ball Bearings- DC12V-36V

eBay item number:385191865348
eBay item number:394369188645
Cheap enough at £9 quid each.

https://www.ebay.co.uk/itm/394369188645?itmmeta=01HRVSMSFQRQN0M4Y43334TKFR&hash=item5bd23c4325:g:SkoAAOSw5g5jkZHM&itmprp=enc%3AAQAJAAAA4GT2RIA5xDxfrWKySgJzBKSA%2Bt6Gj6PNgnj1vOkSRPcj4Ls8hKAZ3StReqIQ4AzxWOZYaaTD8sn5CmOapDpj6G%2Bn24t3T3%2FY5Yzml6gOaqSA6d8ldTYa4F5Zrq0OyA6Qc2%2F4VnExxG7jNkB2aCj%2F8xMZAoxNWZPFcvo6o8GPkBNSB4PO%2B6ybSa4oPVEvYAn4L2JFIKdLzmwC2VL%2BQ5WaX6y%2FrwZDPMXIsa7vsl7L0K8PMno2d3mS9ZdRISrt%2FeqFY6TTaT6y76TXoTqUEVp4f5R%2BXL%2FzpwvWwOy6Z9wnp9qm%7Ctkp%3ABFBM9JfT-cZj

[hama]

Hello!
May I ask if it's safe to use a 12v SLA for a ESC rated for 6-9 cell Nimh as stated above? I'm curious for my own applications.
Thanks in advance!


Hama

[Subculture]

With regards to the TID tug, with a 60mm prop, you ought to be looking at a loaded speed of no more than a round 3500RPM. The 775 on 12v looks like it may be a good fit assuming it has the torque to pull the prop round direct drive.

[Treble]

Have just read the suppliers information on the 775 motor , and it's too full of contradictions for me . I believe the MFA products are a safer bet.

[HMS Invisible]

If anyone sends me two of these 775 motors I could make a performance graph.
I'd also be willing to pass them on to someone in the greater Glasgow region.

[DHutch]

With regards to the TID tug, with a 60mm prop, you ought to be looking at a loaded speed of no more than a round 3500RPM.

Ok, that's good information.


Thanks

[DHutch]

Have just read the suppliers information on the 775 motor , and it's too full of contradictions for me . I believe the MFA products are a safer bet.

It's certainly not worth saving a tenner to have to do it all again because the motor isn't doing what is says!

[Subculture]

This looks just the job to me.

https://www.ebay.co.uk/itm/186224882749?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20201210111451%26meid%3De11e50c2e7b84cd0ae382f97ad342379%26pid%3D101196%26rk%3D3%26rkt%3D12%26sd%3D394369188645%26itm%3D186224882749%26pmt%3D1%26noa%3D0%26pg%3D4429486%26algv%3DSimplAMLv5PairwiseWebWithBBEV2bAndUBSourceDemotionWithUltimatelyBoughtOfCoviewV1%26brand%3DUnbranded&_trksid=p4429486.c101196.m2219&itmprp=cksum%3A186224882749e11e50c2e7b84cd0ae382f97ad342379%7Cenc%3AAQAJAAABMKAGZatwWrSFioKhyF05YYps7xtgOI2Vu0BqB4BERv%252FNTfrUNkP50TZAJfREiGj7R%252BA2x2E5zTqSs43jfR6uCcmt8%252B%252BTUdobg9SfOq%252BIqjUBSsrpGjJHg8BhG0zl%252F8Eg%252FbXstCSEJ9OzKqsgiwKnFXMX9qBbLpQdvNNlhRTBKW%252Bct%252Fjog06O1pnbZsm5zUo15EMnDFje8CXOmD2ltpkwwxSUjT0pAbIzcyE8pXDD5PP2V%252FElv49uF1F5YOhK4GZ6MI29qrRP0i%252B4kKzP1kkTylyH7d9ZYO1jXYZuhS%252FDHW3zhI6ImSZXaosoVvKLWO3D8ACWK%252BzGNqdEn3aXTJLku29hgR5TvyIxa2jpaP5zaqlRo2zOCcVtLd%252Fifer28IUfrG4mEd1lcKOlnKnsO%252BPuw%252FM%253D%7Campid%3APL_CLK%7Cclp%3A4429486&itmmeta=01HRYW5W20X4JVEYK381X0G230

[roycv]

The Decaperm is also a 30 watt motor.  They were too expensive to make hence their final pricing.  If the tug works with the Decaperm I would leave it in situ.
Roy

[DHutch]

If anyone sends me two of these 775 motors I could make a performance graph.
I'd also be willing to pass them on to someone in the greater Glasgow region.

I guess the only risk here is you test two, get some data, and then future orders are a different spec or batch! How to you graph the performance?

[DHutch]

This looks just the job to me.

https://www.ebay.co.uk/itm/186224882749?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20201210111451%26meid%3De11e50c2e7b84cd0ae382f97ad342379%26pid%3D101196%26rk%3D3%26rkt%3D12%26sd%3D394369188645%26itm%3D186224882749%26pmt%3D1%26noa%3D0%26pg%3D4429486%26algv%3DSimplAMLv5PairwiseWebWithBBEV2bAndUBSourceDemotionWithUltimatelyBoughtOfCoviewV1%26brand%3DUnbranded&_trksid=p4429486.c101196.m2219&itmprp=cksum%3A186224882749e11e50c2e7b84cd0ae382f97ad342379%7Cenc%3AAQAJAAABMKAGZatwWrSFioKhyF05YYps7xtgOI2Vu0BqB4BERv%252FNTfrUNkP50TZAJfREiGj7R%252BA2x2E5zTqSs43jfR6uCcmt8%252B%252BTUdobg9SfOq%252BIqjUBSsrpGjJHg8BhG0zl%252F8Eg%252FbXstCSEJ9OzKqsgiwKnFXMX9qBbLpQdvNNlhRTBKW%252Bct%252Fjog06O1pnbZsm5zUo15EMnDFje8CXOmD2ltpkwwxSUjT0pAbIzcyE8pXDD5PP2V%252FElv49uF1F5YOhK4GZ6MI29qrRP0i%252B4kKzP1kkTylyH7d9ZYO1jXYZuhS%252FDHW3zhI6ImSZXaosoVvKLWO3D8ACWK%252BzGNqdEn3aXTJLku29hgR5TvyIxa2jpaP5zaqlRo2zOCcVtLd%252Fifer28IUfrG4mEd1lcKOlnKnsO%252BPuw%252FM%253D%7Campid%3APL_CLK%7Cclp%3A4429486&itmmeta=01HRYW5W20X4JVEYK381X0G230

Maybe. But is it better than a MFA 800?

[DHutch]

The Decaperm is also a 30 watt motor.  They were too expensive to make hence their final pricing.  If the tug works with the Decaperm I would leave it in situ.
Roy

Always an option obviously, and I'm told the 6v and 12v version are actually the same motor. Just wary of using something older, which might well resell for the cost to replace. Plus keen to avoid the noise of the gearbox.

[Andyn]

Maybe. But is it better than a MFA 800?

MFA 800’s and 850’s have never been and never will be good motors…

[Fastfaz]

 I not sure you would want to use one in the flying machine logo over your name (last post) however I know from experience (Tug towing competitions and scale sailing) that the MFA 800 will do the job provided you use a quality TX, no longer available MMM T12 motors would be my preference. The MFA 850 revs way to high/fast for a tug. The choice is for the individual in the long run. The Ebay 3k rpm motor has an 8mm drive shaft so might be tricky finding a suitable coupling. I'm sure you'll get it sorted.


       Regards, Pete. 

     

[HMS Invisible]

I guess the only risk here is you test two, get some data, and then future orders are a different spec or batch!

We all learn due diligence lessons when using Ebay. The Ebay item numbering helps in that regard.

How to you graph the performance?

I've been promised two of the actual auction listed 755s early next week so can construct a meaningful graph for more than one voltage.Test equipment for a 755 would need no more than a single 300 Watt power supply, tacho, temperature, current and voltmeters. That's easier for someone to obtain from scratch than for me to condense the knowledge needed to make a meaningful graph or list the key performance parameters.
Doing a pondside check to see if a prop & low current motor are matched takes a couple of measurements on a borrowed £10 tacho or multimeter readings.

[Treble]

Mobile Marine Models do an 8 mm Large Safety Coupling for less than £8.

[unbuiltnautilus]

Just to say nice things about the Torpedo 800. I needed a high load setup today, so slapped a 15in wooden aircraft prop on one and spooled it up to 12v with an ammeter in line. Lots of wind 7.5 amp current draw.. with a Torpedo 540/1 0n a 2.5:1 motor in parallel at the same time! Don't ask why, it makes sense to me.
Also the 6v and 12v Decaperms were not the same motor, one had been designed to provide a set rpm at 6v, the other, roughly the same output at 12v but with roughly half the current drain. The benefits of paying attention to the adverts thirty years ago!