News:


  • June 16, 2024, 08:43:56 AM

Login with username, password and session length

Author Topic: Basswood compared to Maple for motor mounts  (Read 1571 times)

Offline ray copeland

  • 24 supporter
  • Trade Count: (0)
  • Captain
  • *
  • Posts: 871
Basswood compared to Maple for motor mounts
« on: May 31, 2008, 03:14:56 PM »
Building an FS fuselage, is basswood exceptable for motor mounts , or does it have to be maple or other hardwood?  Also , how about .078 wire to mold landing gear, too small or okay? 
Ray from Greensboro, North Carolina , six laps inverted so far with my hand held vertically!!! (forgot to mention, none level!) AMA# 902150

Offline Jim Oliver

  • 23 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1407
Re: Basswood compared to Maple for motor mounts
« Reply #1 on: May 31, 2008, 03:36:50 PM »
Basswood is light and quite soft----not at all suitable for engine mounts, IMO--I wouldn't even use it with aluminum pads.

For the gear, I would use 3/32 music wire, that's about .096 or so.

Cheers,
Jim



Jim Oliver
AMA 18475

Offline ray copeland

  • 24 supporter
  • Trade Count: (0)
  • Captain
  • *
  • Posts: 871
Re: Basswood compared to Maple for motor mounts
« Reply #2 on: May 31, 2008, 03:51:33 PM »
Thanks Jim, the advice and experience on this forum is absolutely priceless! If not for this type of advice a lot of people including myself could get discouraged easily especially living in an area where there are not a lot of control line flyers ! I will hunt down some better hardwood before progressing , i think i know where i can get 3/32 wire locally. Thanks again,  Ray  H^^
Ray from Greensboro, North Carolina , six laps inverted so far with my hand held vertically!!! (forgot to mention, none level!) AMA# 902150

Offline Leester

  • 2014 Supporters
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2529
Re: Basswood compared to Maple for motor mounts
« Reply #3 on: May 31, 2008, 06:30:09 PM »
For landing gear I use 1/8" ,for pushrods I use 3/32".
Leester
ama 830538

Offline Jim Oliver

  • 23 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1407
Re: Basswood compared to Maple for motor mounts
« Reply #4 on: May 31, 2008, 06:46:11 PM »
I suggested 3/32 music wire because the Flite Streak is fairly light---for something much heavier I would use 1/8 inch also.  I use 5/32 music wire on some of the larger/heavier stuff.

Cheers,
Jim
Jim Oliver
AMA 18475

Offline Andrew Hathaway

  • Trade Count: (0)
  • Captain
  • *****
  • Posts: 805
Re: Basswood compared to Maple for motor mounts
« Reply #5 on: May 31, 2008, 06:56:11 PM »
If you have to fly off of grass, 3/32" will probably start bending back quickly.  I use 1/8" for most stuff, and even then sometimes it's bordering on too soft.  Maple motor mount stock should be available from Sig. 

Offline dankar

  • Trade Count: (0)
  • Captain
  • *****
  • Posts: 431
Re: Basswood compared to Maple for motor mounts
« Reply #6 on: June 01, 2008, 04:01:04 AM »
Basswood is nice to work with. It is soft and engine mounts not good. I have built two Sport Jets using bass wood that came out very nice.
Dan

Offline roger

  • Trade Count: (0)
  • Captain
  • *****
  • Posts: 405
Re: Basswood compared to Maple for motor mounts
« Reply #7 on: June 01, 2008, 04:57:18 AM »
i use it never had a problem ( but i dont fly to much) may maybe once a month

roger %^@

Offline don Burke

  • 2014 Supporters
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1027
Re: Basswood compared to Maple for motor mounts
« Reply #8 on: June 01, 2008, 09:27:38 AM »
I have found bass is OK if threaded inserts are used, but I make my own from flat head screws, 10-32s threaded 4-40.  I make them a little (1/32") longer than the thickness of the mount then install them with the screw head under the mount and carefully file them down flush with the mount material.  I use a dab of epoxy when installing.  They don't pull out and provide a good hard point.   Sometimes I'll use an aluminum pad but usually only if I'm making a universal plate that I can use to change engine types. 

I found that the usual hobby shop type inserts don't hold up very well and are a disaster if used in harder wood mounts, they'll split out in a minute.
don Burke AMA 843
Menifee, CA

Offline Mike Greb

  • 24 supporter
  • Trade Count: (0)
  • Commander
  • *
  • Posts: 334
Re: Basswood compared to Maple for motor mounts
« Reply #9 on: June 10, 2008, 03:43:00 PM »
A top team racer told me that he uses basswood for his engine crutch because it flexes enough that it lets the motor move the way it wants to when it is at running temperature so that the motor is not in a bind as it would be with a more solid crutch.  It doesn't seem to be what you would want with a vibration machine like a fox 35...

Offline Steve Helmick

  • AMA Member and supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 9956
Re: Basswood compared to Maple for motor mounts
« Reply #10 on: June 10, 2008, 10:38:33 PM »
Ty...I used a lot of basswood (SIG) in a bunch of speed models, and I would describe it as about like pine or cedar, but with virtually no knots. The few knots were tiny. Maybe SIG does a better job with selection? Our local lumber yard (NOT Home Depot) has Poplar that is pretty similar, maybe a bit harder, very clean cut, smooth and straight. Tom Morris sells/sold some engine mounts made with Spruce or Maple. How about asking him about how the Spruce engine mounts are used?  D>K Steve
"The United States has become a place where professional athletes and entertainers are mistaken for people of importance." - Robert Heinlein

In 1944 18-20 year old's stormed beaches, and parachuted behind enemy lines to almost certain death.  In 2015 18-20 year old's need safe zones so people don't hurt their feelings.

Offline Leo Mehl

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 1951
Re: Basswood compared to Maple for motor mounts
« Reply #11 on: June 25, 2008, 08:06:19 AM »
The best is Maple. I had a friend that used oak once and his plane vibrated like crasy. If you want to dampen your engine run use Balsa doublers.


Advertise Here
Tags:
 


Advertise Here