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General control line discussion => Open Forum => Topic started by: Paul Taylor on April 18, 2017, 06:59:41 PM

Title: Engine crutch for canted mount
Post by: Paul Taylor on April 18, 2017, 06:59:41 PM
Are there any plans that show how a side exhaust engine is mounted so the muffler is center on the bottom. I remember seeing a CL plane but don't remember where.

Thanks in advance
Title: Re: Engine crutch for canted mount
Post by: John McFayden on April 18, 2017, 07:46:04 PM
The Ringmaster Deluxe is a profile designed with a canted engine.
Title: Re: Engine crutch for canted mount
Post by: Paul Taylor on April 18, 2017, 08:00:44 PM
Sorry.
Looking for a full fuse.  H^^
Title: Re: Engine crutch for canted mount
Post by: Mike Haverly on April 18, 2017, 09:39:34 PM
Use an RC mount and mount it to F1.  It's really not much of an engineering problem to figure it out, it just has to strong.  I did it on a modified profile Cardinal with a Magnum .36 on a pipe, similar to what Randy Powell did on his Ringmaster Deluxe.  A full fuselage would be much easier.
Title: Re: Engine crutch for canted mount
Post by: Trostle on April 18, 2017, 10:29:09 PM
Al Rabe did it on his Snaggle Tooth P-51.  I do not know where plans can be found.

You might find something on one of his several threads.

Keith
Title: Re: Engine crutch for canted mount
Post by: Eric Viglione on April 19, 2017, 05:32:20 AM
IIRC Igor Burger last IC LA46 WC plane before he went electric was canted that way... and like most of his stuff, it appears to have taken him far. Not sure if it was published but Igor likes to share, he is on this forum, can't hurt to ask.
EricV
Title: Re: Engine crutch for canted mount
Post by: Christoph Holtermann on April 19, 2017, 06:40:57 AM
I have built such model for my Enya-61 side exhaust in 2008 and showed some pictures in another forum:

http://www.clstunt.com/htdocs/dc/dcboard.php?az=show_topic&forum=106&topic_id=1660&mesg_id=1660&page=

I don't have plans but the engine bearers (beechwood) are of triangular shape (20mmx20mm). One glued to the fuselage side. It ends at the first firewall to the tank compartment. The other engine bearer goes up to firewall up to the end of the tank compartment. You have to fiddle the tank in but the engine run was good on the plane, no vibration problems. It already has 930 flights on it. With 1° downthrust and 1.5° side thrust it flies extremely well.

Igors Model had a rear mounted LA-46 in it. He bolted the engine directly to the firewall. I remember it well. He built it in our club.

Christoph
Title: Re: Engine crutch for canted mount
Post by: Paul Taylor on April 19, 2017, 06:45:48 AM
Thanks Guys. It's a jumping off point.  H^^
Title: Re: Engine crutch for canted mount
Post by: Igor Burger on May 11, 2017, 12:56:52 PM
... little later, but I am here :- ))

I had 2 such models with LA .46, both mounted the same way, it worked perfectly, model did not have any cowl, it needed little bit thinking to insert the tank, and flexible screw driver for mounting backplate screws. Both had slim carbon pipes from Randy and orriginal OS manifold which put the pipe to center of fuselage. The best placing before conversion was 10th place in Sebnitz. The same model was later converted to electro as Eric wrote and placed 2nd in Landres.

http://www.netax.sk/hexoft/stunt/the_max_ii.htm

its predecessor was almost identical, the only difference was classic linkage.

http://www.netax.sk/hexoft/stunt/the_max.htm

and yes those desks are in Christoph's club ... BTW thanks Christoph for letting me build them there.
Title: Re: Engine crutch for canted mount
Post by: pat king on May 11, 2017, 09:03:05 PM
The Ringmaster Sportster is a built-up fuselage airplane with the engine canted, it is mounted so that the exhaust points down like a profile ship.

Pat
Title: Re: Engine crutch for canted mount
Post by: fred cesquim on May 12, 2017, 06:22:25 AM
if i understood, you´re asking how to mount the engine support to have the muffler on the belly of the plane.
the (poorly) drawn sketch may be helpfull.
you trace center line and engine base on your firewall, then use the intersection point as a reference, make a 45 degree X, and replicate the engine support distance on the 45 degree lines, hope this helps
you may check if 45 degree is too much placing the engine over the newly drawn lines ok?