News:



  • June 01, 2024, 09:49:49 AM

Login with username, password and session length

Author Topic: Full fuse ARC/ARF mods?  (Read 912 times)

Offline Jim Howell

  • 2016 supporter
  • Trade Count: (0)
  • Commander
  • *
  • Posts: 159
Full fuse ARC/ARF mods?
« on: April 25, 2011, 06:28:49 PM »
The "List your set-up" thread includes several experiences converting profile ARC/ARF models, but only a couple of entries for converting full-fuse ARC/ARF's.  (I'm not talking about the typical mods that need to be considered for ARC/ARF's as discussed in Rudy's ARF's thread.)  It seems to me that building up a full fuse for electric is a bit different.  Some of the ARC/ARF's I've seen have IC-sized maple motor mounts, with floors for tanks and heavier ply doublers than might be chosen if one were to start from scratch.  And there's not much access to cut down/away excess material.  At least with a profile, you can run the motor mounts thru a good jig saw and get rid of material in the motor mount and side doublers.

So what have you folks done?  Looks like if you limit it to mounting the motor and figuring out how to stow/control the battery, then you've probably got a fairly heavy beast on your lines.

Comment?

Jim Howell
Huntsville, AL
Jim Howell
Huntsville, AL  AMA 545805

Offline Allan Perret

  • 2017
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1892
  • Proverbs
Re: Full fuse ARC/ARF mods?
« Reply #1 on: April 25, 2011, 07:42:34 PM »
I been thinking about just such a project on 2 of my full fuse birds which have begun to vibrate bad with age and the older style low rev cross flow engines.
I been threatening to get Fein Multimaster type saw, it would be the tool of choice to go in from bottom and surgically remove the motor mounts.

Or you put on a dust mask and do a lot of damage with a Dremel tool and coarse sanding drum.
« Last Edit: April 27, 2011, 05:49:17 AM by Allan Perret »
Allan Perret
AMA 302406
Slidell, Louisiana

Offline Mike Scholtes

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 1194
Re: Full fuse ARC/ARF mods?
« Reply #2 on: April 25, 2011, 08:57:40 PM »
My conversion of the ARF Legacy is in the "setup" list above. It came out well and is a great flying model. I went the Dremel rotary drum/sanding mask route but also beefed the bejeezus out of the wing saddle and center section, after hearing of some similar models (earlier T-Rex) cracking at stress points. If you want to PM me I can email some photos of the process. I also would probably take a different approach and make it a top loading battery setup rather than bottom loading. Not really a big deal to flip the model over; battery change takes under a minute.

Online Dennis Adamisin

  • 2019 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 4345
Re: Full fuse ARC/ARF mods?
« Reply #3 on: April 25, 2011, 09:19:55 PM »
On the Brodak Oriental, Vector, and Strega ARFs I removed the mounts completely.  They actually pop out quite easily.  On the Smoothie I removed the mounts forward of the firewall only.  In the battery zone the mounts were in the correct height to mount the battery, so I settled for removing the webbing between the mounts.  The ESC goes down there.  Removing the mounts saves weight (especially for the Strega) but more important it really frees up space for mounting stuff and getting good airflow paths.

I used some rotary wood rasps to hack out the mounts to convert an old gassie - frankly it was a PITA but it worked OK.


Of course if you build up the fuse from scratch it is easy to leave out parts!
Denny Adamisin
Fort Wayne, IN

As I've grown older, I've learned that pleasing everyone is impossible, but pissing everyone off is a piece of cake!

Offline Jim Howell

  • 2016 supporter
  • Trade Count: (0)
  • Commander
  • *
  • Posts: 159
Re: Full fuse ARC/ARF mods?
« Reply #4 on: April 26, 2011, 07:47:56 PM »
Allan, Mike, Dennis,

Got your responses.  Thank you for your responses.  I had assumed that the Dremel/dust mask approach was the most straight-forward, even tho' I was most turned off by it.  I've ground down motor mounts before and don't particularly like it.  Any pics would be useful.  And, yes, I agree that building up from parts and pieces is the better approach.  I was thinking that having the pre-built wing was worth the hassle of modifying the fuse.  I guess I ought to send an email to John B.  suggesting that they offer a fuselage parts short-kit for some of us to add to the ARC wing.  They've got rib sets on the listing, but no fuse parts.  Guess they figure that people will bust wings, but not fuses. <=

Thanks,
Jim Howell
Jim Howell
Huntsville, AL  AMA 545805

Offline Dean Pappas

  • Moderator
  • Trade Count: (0)
  • Admiral
  • *****
  • Posts: 1195
  • Welcome to the Stunt Hanger.
Re: Full fuse ARC/ARF mods?
« Reply #5 on: April 27, 2011, 03:31:38 PM »
...  Or you put on a dust mask and do a lot of damage with a Dremel tool and coarse sanding drum.

Picture if you will, good friends, just a few years ago ... Okay it's been quite a while I guess, but ...
There was Hunt poised over the Genesis Extreme with Dremel in hand, and me holding a Weller soldering gun to his head as a mock threat, "You or the engine bearers ... one of you doesn't make it out of this shop alive!"
Bob ground the maple away and bolted the AXI in and the rest has been an adventure.

Ah nostalgia! LL~
  Dean
Dean Pappas

Offline Allan Perret

  • 2017
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1892
  • Proverbs
Re: Full fuse ARC/ARF mods?
« Reply #6 on: April 27, 2011, 05:50:34 PM »
I wish Bob would resurect the Stunt Flyer Video series just so we could watch you tell some more stories like that.
I'm still trying to picture that curtain of bubbles in the uniflow tank. 
Just think of all the new electric material that could be covered.
Got a reply from Mike P.  Thanks for waking him up.
Allan Perret
AMA 302406
Slidell, Louisiana

Offline Dean Pappas

  • Moderator
  • Trade Count: (0)
  • Admiral
  • *****
  • Posts: 1195
  • Welcome to the Stunt Hanger.
Re: Full fuse ARC/ARF mods?
« Reply #7 on: April 27, 2011, 09:06:03 PM »
Remember: Fire is your friend! n~
thanks,
  Dean P.
Dean Pappas

Online Dennis Adamisin

  • 2019 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 4345
Re: Full fuse ARC/ARF mods?
« Reply #8 on: April 28, 2011, 10:53:04 PM »
Jim
Couple pix from the Vector mod of a couple years ago.

The first shows that the webbing has been pulled out from between the mounts.  Please note where the mounts have been ground out (dremel) adjacent to the bulKheads.  Also note the two holes drilled into the mount.  Insert an 8D nail or a piece of wire into each hole and pry the mount off the side.
Denny Adamisin
Fort Wayne, IN

As I've grown older, I've learned that pleasing everyone is impossible, but pissing everyone off is a piece of cake!

Offline Jim Howell

  • 2016 supporter
  • Trade Count: (0)
  • Commander
  • *
  • Posts: 159
Re: Full fuse ARC/ARF mods?
« Reply #9 on: May 02, 2011, 09:25:29 AM »
Jim
Couple pix from the Vector mod of a couple years ago.

The first shows that the webbing has been pulled out from between the mounts.  Please note where the mounts have been ground out (dremel) adjacent to the bulKheads.  Also note the two holes drilled into the mount.  Insert an 8D nail or a piece of wire into each hole and pry the mount off the side.
Dennis,

Got it, thanks! More or less what I had envisioned from your PM.  But I had missed an important point.  You are actually rotating the mount along the long dimension to pry it off, one side at the time.  I had thought that you were using two nails, one at the same end of each of the two mounts and then pulling across the fuse.  This looks much better.

Thanks,
Jim
Jim Howell
Huntsville, AL  AMA 545805


Advertise Here
Tags:
 


Advertise Here