Anyone Good at Math - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
RCCanada - Canada's Radio Control Hobby Forum
General RC Aircraft Discussion Discuss anything RC related

Thread Tools Display Modes
Old 10-14-2010, 09:02 PM   #11
RCC Apprentice
rc300xs's Avatar
Join Date: Aug 2010
Location: Grimshaw AB

Feedback: 1 / 100%
Posts: 42
Total Props: 0
Re: Anyone Good at Math

       Remove this ad - become a site supporter!
Wow. Burning off 489000mah in 15 minutes or so. That explains the heat.
rc300xs is offline   Quick reply to this message.

Sponsored Links - Subscribe to remove this ad.
Old 10-14-2010, 09:39 PM   #12
Ken Currell
I am: Ken Currell
Join Date: Jun 2004
Location: Whitby, Ontario
Radio of choice:
Multiplex Royal Evo
# of RCs: 30+

Feedback: 3 / 100%
Posts: 3,688
Total Props: 0
Re: Anyone Good at Math

Originally Posted by JohnM View Post
Thanks again both Steve and Andrew - nice to see your calculations. 19 oz. it is! Cheers
That answer is in US oz.

Imperial oz. capacity is slightly higher at 19.82557. Pretty close to 20 oz.
Ken Currell is offline   Quick reply to this message.
Old 10-14-2010, 10:15 PM   #13
Gary Maker
RCC Supreme Contributor
I am: Gary M.
Join Date: Jul 2003
Location: Stoney Creek, Ontario
Radio of choice:
Spektrum DX8
# of RCs: 7

Feedback: 25 / 100%
Posts: 7,331
Total Props: 9
Re: Anyone Good at Math

Wow! You guys are awesome! I knew that RCC guys can figure out anything! Darn, I knew I shoulda paid more attention to math when I was in High school!

True story! I remember sweating over math homework and I asked my Dad: "What the heck is math good for anyways?"

He answered: "For one thing, math is good to help you keep track of your money, because if you can't......someone else will!" Never forgot that!
Stoney Creek Hawks RC
MAAC No. 43659

Radios used: Spektrum DX6i
Current builds: 1/4 scale J3 Cub & Neiuport 17 and KMP B-25.
Currently flying: Scratched Tele 40, Parkzone Stryker & 60" SPAD Debonaire


"Time flies like an arrow - fruit flys like a banana." Groucho Marks
Gary Maker is offline   Quick reply to this message.
Old 10-14-2010, 11:02 PM   #14
RCC Contributor
Gooseman240's Avatar
I am: Evan R
Join Date: Mar 2010
Location: Athabasca
Radio of choice:
The one that came with the plane :S
# of RCs: 2

Feedback: 0 / 0%
Posts: 345
Total Props: 0
Re: Anyone Good at Math

Tru dat gary!!
Nothing like the smell of castor in the morning!!!!!

Super Sportster 40 MKII
Nexstar Select - Rebuild (covering job, convert to tail dragger)

P-47 Razorback
Harvard (AT-6)
(Undecided on a bipe, pitts? or hog? 60"-80" wingspan)
Gooseman240 is offline   Quick reply to this message.
Old 10-15-2010, 05:54 AM   #15
RCC Supreme Contributor
OICU812's Avatar
I am: Shawn S
Join Date: Jan 2006
Location: Central, Alberta

Feedback: 31 / 100%
Posts: 2,405
Total Props: 19
Re: Anyone Good at Math

Some serious NERDS here!!!
Once upon a time there were Nitros, Flybars & Frequency pins
My Main OL Photo Gallery:
OICU812 is offline   Quick reply to this message.
Old 10-15-2010, 08:11 AM   #16
RCC Senior Contributor
I am: darren r
Join Date: Jan 2009
Location: Peterborough ON,Canada
Radio of choice:
# of RCs: 15+

Feedback: 2 / 100%
Posts: 677
Total Props: 0
Re: Anyone Good at Math

Originally Posted by OICU812 View Post
Some serious NERDS here!!!
lmao um yea good read though
Proud Customer of rotorquest com
darrenR is offline   Quick reply to this message.
Old 10-15-2010, 09:13 AM   #17
RCC Expert Contributor
I am: R D
Join Date: Jan 2009
Location: Kincardine

Feedback: 1 / 100%
Posts: 903
Total Props: 39
Re: Anyone Good at Math

Originally Posted by Wayne V View Post
1 gallon of gasoline has approx 125000 Btu's of energy

19oz ( tank size )/128oz ( 1 gallon) = .1484

125000x.1484 = 18550 Btu in 19oz of gasoline




So on a 3s pack that would be 5437/11.1v=489Ah or 489000mah

On a 6s pack that would be 5437/22.2=244.9Ah or 244900mah

This was not including the oil that was mixed in the gas, so it would be a tad less.
Its to bad you don't get the efficiency of an electric motor. So the gasoline provides the equivalent of that much energy but the engine at best converts 10-25% of that into work.
Helno is offline   Quick reply to this message.
Old 10-15-2010, 10:30 AM   #18
I am: Boolean21
Join Date: Sep 2002
Location: Singapore

Feedback: 0 / 0%
Posts: 38,228
Total Props: 56
Re: Anyone Good at Math

oh boy, here we go...
PurgatorY is offline   Quick reply to this message.
Old 10-15-2010, 11:22 AM   #19
RCC Junior Contributor
I am: John A. Sutherland
Join Date: Mar 2009
Radio of choice:
JR, SPEKTRUM, FrSky, Turnigy
# of RCs: 53

Feedback: 0 / 0%
Posts: 177
Total Props: 0
Re: Anyone Good at Math

I have a tank that size and it is a 18 oz tank, bacause it is not 100% square, and never 100% full. The label on the bag is easy to read. Most tanks have round corners, and bow a bit. It sounds like that is a good size for that plane and engine. Funny there is no label on the tank, or part #.
JSUTHERLAND8 is offline   Quick reply to this message.
Old 10-18-2010, 06:03 PM   #20
RCC Contributor
JohnM's Avatar
I am: John M.
Join Date: Apr 2007
Location: Ancaster, ON
Radio of choice:
# of RCs: 5

Feedback: 1 / 100%
Posts: 331
Total Props: 5
Re: Anyone Good at Math

Mr. Sutherland: the tank came installed in the ARF - Pilot R/C 26% Yak 54. . . no support documents to say how many fluid ounces it would hold. I agree with your calculations though. . . Cheers - John M.
Ancaster Sport Flyer... "your attitude affects your altitude!"
JohnM is offline   Quick reply to this message.

Quick Reply

Register Now

In order to be able to post messages on the RCCanada - Canada Radio Controlled Hobby Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionally, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Your Name
Your first name and last initial is required if you plan on using the forum.
Which city & province you live in. This is mandatory for classified listings.
Radio of choice?
Which radio is your current favorite to use?
Number of RC Vehicles?
How many boats, cars, planes do you own?


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
vBulletin Message

Thread Tools
Display Modes

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Math question? PurgatorY General RC Aircraft Discussion 7 09-24-2009 08:08 AM
GH Air...50cc, Good? or Not good? Giant Scale Aircraft 13 09-06-2009 06:51 AM
Math wehrley FS - Electronics 1 08-08-2008 07:50 PM

All times are GMT -5. The time now is 08:37 AM.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.