Profile - Inboard mounting

[Larrys4227]

I am resurrecting an old K&B Torpedo .35 w/carb/exhaust baffle and going to mount it on a bashed up/rebuilt X10 Flight Streak.

The problem is, if I mount it the traditional outboard side on a profile .... the exhaust is facing up, and the long needle is facing down which means the needle won't last long with any kind of nose-in landing, and my holder is going to get a faceful of exhaust/oil/slime.

The plane is to play around with a throttled engine. No ambitions to contests, or any of the sort.

Is there any reason I shouldn't/couldn't/wouldn't mount this engine on the inboard side?

Thanks!  Larry

[john gunn]

'I started flying with one of those, mount it with the exhaust down, needle up..
have fun

[Howard Rush]

I mounted mine exhaust-up.  My ears are still ringing half a century later.  I put the needle valve up, too.  Teaches you to adjust the mixture quickly. 

[Larrys4227]

Thanks John .... and Howard, yes the noise effects to the hearing is also a problem.

Thanks for the replies ... I had thought long about inboard mounting, but maybe I was missing something important. 

As always, pics are nice within posts .... so I offer the subject of discussion. 

Haven't run it yet .... just finished cleaning it up.  The carb was the worst.  It's got a great pop, and excellent compression.

The glow plug is dead, but looks like the last owner preferred an RC Long w/Idle Bar.

[Andre Ming]

Noise:

The years spent at Fox Mfg. Co. took its toll on my hearing: I have Tinnitus (ringing ears) and high frequency loss, mostly in the left ear.  My vocation requires hearing certifications in order to remain employed. At this point I can still pass the requirements. In addition to my vocation-required use of earplugs on the job, I have learned to USE QUALITY EARPLUGS when I'm doing "loud" things at home.  It has MADE A DIFFERENCE in my hearing loss in that I'm not currently losing more hearing.

Therefore, when I am messing with my vintage engines, whether test bench running, or firing one up on an airplane to put into the air... I have my earplugs crammed in all the way to the eardrum! (Sort of!)  I do take them out once I'm on the handle so I can better hear what the engine is doing.

Seriously: PROTECT YOUR HEARING.  Nerve damage hearing loss cannot be reversed.

[Steve Helmick]

Noise:

The years spent at Fox Mfg. Co. took its toll on my hearing: I have Tinnitus (ringing ears) and high frequency loss, mostly in the left ear.  My vocation requires hearing certifications in order to remain employed. At this point I can still pass the requirements. In addition to my vocation-required use of earplugs on the job, I have learned to USE QUALITY EARPLUGS when I'm doing "loud" things at home.  It has MADE A DIFFERENCE in my hearing loss in that I'm not currently losing more hearing.

Therefore, when I am messing with my vintage engines, whether test bench running, or firing one up on an airplane to put into the air... I have my earplugs crammed in all the way to the eardrum! (Sort of!)  I do take them out once I'm on the handle so I can better hear what the engine is doing.



I'll Second Andre's comments. Tinnitus is a bad deal; it sucks. Avoid it.

Mount the engine (and tank) inboard if you wish, but also add more tipweight...I'd guess at least and ounce more, maybe 2, and be ready to add more with packing tape and coins.  If you have any coins, after April 15.  Steve












































Seriously: PROTECT YOUR HEARING.  Nerve damage hearing loss cannot be reversed.

[Larrys4227]

I hear ya {pun intended  } on the noise .....

Steve, I planned on mounting my 3-cell battery out in the wingtip ....

This all came about with help from the .15 carrier thread ... 3-lines always confused me.  It was pointed out that 2.4G surface radio/recvr's were cheap .... never thought I'd be able to do this for 40-50.00 until saw the prices.

This'll be a fun project to get my feet wet on throttled engines.   

[john e. holliday]

Chop the nose off just ahead of the opening of the engine plus a little extra for a 1/4inch ply plate.  Glue to the hard wood left in the fuse with dowel pins holding it in place also.   Then use one of the plastic/composite engine mounts usually used for the RC planes.    Of course on a Flite Streak you wont have much room for a tank.  But if this is just for fun the tank can be made deeper.  At one time I had a scale racer with an inverted engine set up.  Made an engine plate like for a built up stunt fuse and slotted the profile fuse for it.   

[Chris Wilson]

How about setting up the model to fly clockwise?

That way you can outboard mount the engine and have the exhaust and needle valve in its best position.

[Ward Van Duzer]

Yea Larry, that way you can get dizzy backwards! 


Ward-O

[Larrys4227]

Alittle at a time .... moving forward with my fun-sport-flier-project.

This FS has been rebuilt many times over .... its heavy and gangly.  It's last duty was with a McCoy35 RH as a trainer plane.  It did really well and took some repeated abuse from new fliers.

Got the K&B mounted last week, and it ran as well as it could on an old Fox plug.  But, it ran .... so off on the next step.

Today, USPS delivered a couple of Thunderbolt RC Long w/idler plugs.  Wow, what a difference .....    Transistion is real good even if I snap the carb open. Idle was certainly lower with the idler bar, but we'll see if the plane is up for the vibration its putting out.  Just off of idle it smooths right out and very responsive.

Very pleased with this engine so far!!  And its been starting on the first few flips ....   .... The noise isn't too bad either .... only at full throttle does the decibels really jump up there.

Please dont be too critical of the plane .... it's been to war and back several times.  

Now that I know the K&B is operating well .... off to the next step and spend $40.00 on a complete 2.4 radio system.

[Jim Kraft]

Looks like a fun project. I flew a Veco Tom Tom for a while on three lines and had a ball with it. It has an Enya 19 1V on it, and was a lot of fun to use the throttle when flying maneuvers. Using the light weight R/C stuff they have now will be much better than three lines.

[Larrys4227]

Yeah, the radio equipment is going to simplify alot .... but, gotta find a spot for the servo/recv'r thats outta the way of the slime stream. They're cheap enough to replace, but the motor is quite a slime maker and I'd like to avoid a drenching on every flight.

Funny you mentioned a Veco ....  I have a Veco engine w/carb I was looking at recently ... I think it's a .19 .... its frozen solid and seen better days, but I had ideas going through my head for that one.

I need to find some bigger wheels for the FS and get the prop further from the ground.  I'm anticipating some bouncey landings and touch and go's .... Maybe Hobbytown has a selection of large light weight wheels in the electric section.