Cookies used in this website are gluten free, wheat free and dairy free. By using this website you agree to our use of cookies. More Info
Guest
Login Below
Join Us On Social Media!
   
Get The Model Boats App!
Apple App Store
Android app on Google Play


Help Support This Website
£
or enter custom amount

(Non Contributor)

Help support this free
website and donate.



£285 a year is needed to keep the website and apps online. Please consider donating £5 or more to help towards these fees.
All donations are securely managed through PayPal. Amounts donated are not published online.

Many thanks for your kind support.

Model Boats Website Team


Donation History
October 2018: 5 people
September 2018: 13 people
August 2018: 5 people
July 2018: 8 people
June 2018: 8 people
May 2018: 7 people
April 2018: 24 people
March 2018: 13 people
February 2018: 8 people
January 2018: 9 people


Unique Visitors This Month

Website Members

Terms and Conditions
Privacy Policy
Advertising
Contact


Model Boats Website
Active Users (12)
Login or Register
To Remove This Ad

Login or Register
To Remove This Ad
>> Home > Boat Building Blogs > Calculating scale speed
>> Permalink
mdlbt.com/46534
Calculating scale speed Print Booklet
Author: boaty   Posts: 1   Photos: 0   Subscribers: 0   Views: 93   Responses: 9   |   Most recent posts shown first   (Show oldest first)

mdlbt.com/46535
Calculating scale speed - Posted: 26th Sep 2018
HOW TO CALCULATE SCALE SPEED
Such is the diversity in model boating with anything from a tug to fast service launches and hydroplanes there is always the issue of what is scale speed as we want our models to look right when on the water. This can be achieved by finding the square root of the scale multiplied by the speed of the full size craft. All you need is a pocket calculator and as an example I will use an M.T.B that is flat out at 40 knots. The boat is a 1/35 scale model. We start by dividing 1 by 35 which is .0285714 then press square root that shows up as .1690307 which when multiplied by 40 (speed of full size craft in knots) gives us 6.76 knots for the model. When calculating it in miles per hour the process is still the same.

Boaty😁
Response by Colin H. on the 26th Sep 2018
Thanks Doug, I've got spare Viper marine 25 amp. So hopefully that will do. Also would you recommend a reduction box to give a fair scale speed as I don't want to overwork the motor.
Cheers Colin.
BTW sparky and surveyor have given the green light to my bathroom alterations. Work should start in about 6 weeks.
Response by RNinMunich on the 26th Sep 2018
Hi Colin, I'll answer in the 'Supermarine' thread! Before we are arrested as Hijackers 😲 Doug
Response by Colin H. on the 26th Sep 2018
Whoops, sorry folk's I got carried away.
Cheers Colin.