Go Back  RCU Forums > RC Airplanes > Kit Building
Reload this Page >

Giant Astro Hog Laser Cut Kit - Jerry Bates

Community
Search
Notices
Kit Building If you're building a kit and have questions or want to discuss kit building post it here.

Giant Astro Hog Laser Cut Kit - Jerry Bates

Thread Tools
 
Search this Thread
 
Old 11-18-2023, 08:45 PM
  #226  
speedracerntrixie
My Feedback: (29)
 
speedracerntrixie's Avatar
 
Join Date: Jun 2010
Location: Happy Valley, Oregon
Posts: 9,516
Received 176 Likes on 151 Posts
Default

One thing to remember about electric power is that they deliver instant torque. That’s one reason that it’s typical to use more right thrust. Another reason is that we commonly use more pitch. Taking into consideration your Avian motor specifications, my suggestion would be an APC 21.5x13.5 carbon prop and use a 10S battery. I would set the motor to 3.5 degrees right thrust and .5 degree down thrust. If wet powered with a 13.5 pitch prop you would be correct to think that landing speed would increase, with electric power you can use the ESC brake function to slow the airplane down.
Old 11-19-2023, 12:08 AM
  #227  
rustyrivet
My Feedback: (6)
 
rustyrivet's Avatar
 
Join Date: Mar 2002
Location: Houston TX
Posts: 854
Received 3 Likes on 3 Posts
Default

Originally Posted by Nece
Hello,
it's hard to say because I can't try it out. But I wouldn't add more than 3 degrees. If it's not enough you can mix a little rudder onto the throttle servo. That works well. I have programmed my transmitter so that the rudder deflects about 3 mm at full throttle (with 2.5 degrees of right thrust).
Because you fly this same plane, and you use the same propeller I intend to use, your advice means a lot to me. It's comforting to know that the 3° number you suggest is within a hair of the Jerry Bates plans so I should have nothing to worry about for the calm flying I intend to do. It will be a few weeks more before I am done with the electric conversion at which time I will post the photos of the completed job. Thanks again for your help.
Old 11-19-2023, 12:26 AM
  #228  
rustyrivet
My Feedback: (6)
 
rustyrivet's Avatar
 
Join Date: Mar 2002
Location: Houston TX
Posts: 854
Received 3 Likes on 3 Posts
Default

Originally Posted by speedracerntrixie
One thing to remember about electric power is that they deliver instant torque. That’s one reason that it’s typical to use more right thrust. Another reason is that we commonly use more pitch. Taking into consideration your Avian motor specifications, my suggestion would be an APC 21.5x13.5 carbon prop and use a 10S battery. I would set the motor to 3.5 degrees right thrust and .5 degree down thrust. If wet powered with a 13.5 pitch prop you would be correct to think that landing speed would increase, with electric power you can use the ESC brake function to slow the airplane down.
Yes, you have a valid point about instant torque. I did think of that. But with so little piloting experience I'm not going to deviate too far from Bate's plan specifications or the advice of Nece who has the same custom plane, and same prop I will be using. (ie; When in Rome do what the Roman's do.) Because of limited ground clearance I cannot go beyond a 20" prop anyway. When I use a watt meter to check watts and amps I'll get a pretty good idea of what performance to expect before I take it up. But, this plane flew OK on its maiden 20 years ago with an 18x8 prop, and I'm sure a 20x10 will make a world of difference. Thanks for your input.

Last edited by rustyrivet; 11-19-2023 at 12:28 AM.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.