Shop our Airplanes Products Drone Products Sales
Thread Tools
Old Feb 05, 2010, 10:55 AM
green-boat is offline
Find More Posts by green-boat
Boats on the brain!!
green-boat's Avatar
Quote:
Originally Posted by HeavyCruser9 View Post
Can any one suggest a good gearbox?
If you can, I'd go with a toothed belt-pulley arrangement. Soooo much quieter than gears.
Sign up now
to remove ads between posts
Old Feb 05, 2010, 12:09 PM
patmat2350 is offline
Find More Posts by patmat2350
RingTheBellsThatStillCanR ing
patmat2350's Avatar
Quote:
Originally Posted by HeavyCruser9 View Post
Patmat - I have extensively read your report on gearboxes its a great read! I'd really like the MFA pulley drive but just 2 expensive!
Thanks!

The Master Airscrew part is very quiet, and low cost. Also nice that it can be easily fitted with different ratios.
Furthermore, there is a huge range of 500-size motors to choose from, from hot Speed motors to low speed/low current rock -crawler types. See for example:
https://www.rcgroups.com/forums/showthread.php?t=906148

The MFA design is ridiculously overpowered and expensive, and it has a poorly designed frame to boot-- it flexes and the belt doesn't run true.
Old Feb 05, 2010, 06:43 PM
HeavyCruser9 is offline
Find More Posts by HeavyCruser9
Registered User
HeavyCruser9's Avatar
yeah one of the hobby shop's here has one that they can't get rid of because of the ridiculous price on it!

Cheers Bruce
Old Feb 13, 2010, 03:27 AM
HeavyCruser9 is offline
Find More Posts by HeavyCruser9
Registered User
HeavyCruser9's Avatar
Did a little bit of work on her overnight! added extra lenght wise stringers on bottom just need 2 sought out around bow then I can start gluing!!
Have also re-shaped fwd 5 frames to give a better shape as they looked crap before!!

Cheers Bruce
Old Feb 13, 2010, 03:38 AM
marinaru_ro is offline
Find More Posts by marinaru_ro
Registered User
Looks very good. Keep up the good work!
George
Old Feb 13, 2010, 05:50 AM
HeavyCruser9 is offline
Find More Posts by HeavyCruser9
Registered User
HeavyCruser9's Avatar
Thx George, model ships R very addictive I can't seem 2 stop thinking of new ships 2 build Must finish the ones I have started!! I still have'nt decided if I will use gearboxes or direct drive...

Cheer's Bruce
Old Feb 13, 2010, 10:51 AM
TOWHOOK is offline
Find More Posts by TOWHOOK
Registered User
TOWHOOK's Avatar
That looks like it will be one rock solid hull when you are done. I think if it were me, I would go with a belt type gear drive. Very cool build dude...
Old Feb 13, 2010, 10:58 AM
HeavyCruser9 is offline
Find More Posts by HeavyCruser9
Registered User
HeavyCruser9's Avatar
Towhook I was thinking about getting a pair of planetary G-boxes from Hobbylobby about 3:1 ratio .... Or Direct drive Graupner 720 torque's they R spot on rev range for a tug.

Cheers Bruce
Old Feb 13, 2010, 11:01 AM
TOWHOOK is offline
Find More Posts by TOWHOOK
Registered User
TOWHOOK's Avatar
Have you looked at the MFA 800 gear drives at all ?
Old Feb 13, 2010, 11:04 AM
TOWHOOK is offline
Find More Posts by TOWHOOK
Registered User
TOWHOOK's Avatar
Good grief...I guess it would help if I gave you a link.
http://www.modelflightaccessories.co...tion_800.shtml
Old Feb 13, 2010, 11:11 AM
HeavyCruser9 is offline
Find More Posts by HeavyCruser9
Registered User
HeavyCruser9's Avatar
Yeah I've looked at em just 2 expensive! Be nice for the massive torque available but way over priced. Would'nt mind being able 2 buy the belt drive without the motor, but can probably make up some sought of belt drive out of bits from somethin like 1 of those mobilty scooters the crazy old people use! get some pulleys and belts from the spares dept!! Hmmmm Might look into that......

Cheers Bruce
Old Feb 13, 2010, 11:14 AM
TOWHOOK is offline
Find More Posts by TOWHOOK
Registered User
TOWHOOK's Avatar
Well, actually you can buy the gear drive without the motor. First one right at the top.
http://www.cornwallmodelboats.co.uk/...gearboxes.html
Old Feb 13, 2010, 11:27 AM
HeavyCruser9 is offline
Find More Posts by HeavyCruser9
Registered User
HeavyCruser9's Avatar
Wow I was on their site earlier must be goin blind! Still thats about $83 Au for just the belt drive still very expensive! I have a while 2 save up some bucks they would slot in nicely!

Bruce
Old Feb 13, 2010, 02:14 PM
Jupeli is offline
Find More Posts by Jupeli
Registered User
How about these MP-Jet planetary gearboxes? http://aircraft-world.com/shopexd.asp?id=2483
Old Feb 13, 2010, 04:57 PM
HeavyCruser9 is offline
Find More Posts by HeavyCruser9
Registered User
HeavyCruser9's Avatar
Wow Those R spot on Mate!! Great link Jupeli !! Cheers for that looks like I've found some gear boxes!! Works out about $50au for 2 G-boxes + about $10 postage

Cheers Bruce
Last edited by HeavyCruser9; Feb 13, 2010 at 05:09 PM.


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Build Log A Modern Harbor Tug toesup Dock Talk 514 Sep 06, 2011 02:46 PM
Build Log Project Gatika, Modern Voith Tug yacht boy Scale Boats 198 Feb 19, 2009 05:05 PM
Help! Building a Modern Tug Mast captain at the Scale Boats 15 Dec 23, 2007 08:58 PM
Build Log Ocean/Harbor Tug Based on Fiberglass Hull off eBay not_in_houston Scale Boats 53 Nov 12, 2007 11:27 AM