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Extreme Flight RC Yak 54 - 74 inch!

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Extreme Flight RC Yak 54 - 74 inch!

Old 02-28-2007, 05:14 AM
  #1251  
mark381
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

Mike,

The 240 sounds better all the time, when you get to that stage I would be interested in photos of your engine installation and also the fuel tank set up, as I understand I would need to install two. What size tanks are you going for?

Mark
Old 02-28-2007, 01:47 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

Hi, can someone (when you get the chance) measure the space from the 'middle' of bolt to bolt on there muffler for (B46). Thanks
Old 03-06-2007, 11:41 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

ORIGINAL: FLYMIKE

Hi, can someone (when you get the chance) measure the space from the 'middle' of bolt to bolt on there muffler for (B46). Thanks
Looks to be about 1.425" Weight is right at 3oz. It has a very nice tone for side dump muffler on the B46.

___________________

I just got my 2nd B46 today and it runs great!

See here for details: http://www.rcuniverse.com/forum/m_45...tm.htm#5522417
Old 03-08-2007, 09:42 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

You guys with the Brillelli's-how did you secure your ignition modules? There are no brackets or anything to mount it to the motor box. I was thinking of attaching it with silicone, but I'm thinking I need some foam under it to protect it from vibration. What's the preferred method to use?

My EF Yak is almost done, I hope to put up a few pictures as soon as I get this motor thing worked out. It's my first gasser.

Thanks.

vince
Old 03-08-2007, 09:59 PM
  #1255  
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

I noticed on the bigger Yak the guys were cutting slots in the firewall and using velcro with padding under it. I think Maudib did this you can PM him and ask. It looked real nice when done.
Old 03-08-2007, 10:20 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

Im a Maudib disciple!
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Old 03-08-2007, 10:36 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

Too funny... Does work well though don't it!
Old 03-09-2007, 08:57 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

I promised photos, so here they are.

I used the "Maudib Mounting System" for my C & H ignition module. Other photos show the engine mounts, throttle servo position, fuel tank location and the tray I made to mount my receiver. I also made a tray to mount my battery under the turtle deck, but I'm going to wait and see how the CG comes out before I make that permanent.

It has 5625 servos for the elevators and ailerons, and a 5985 for the rudder. I'm probably going to use a 3004 for the throttle, just because I have a ton of them. I plan on running everything on 6V for the speed.

It's going to take me a while to figure out how to cut that cowl and not butcher it. I've been looking at all the photos of the B40GT's that have been in this thread and plan to use them as a reference.

This is a great thread and I appreciate all the shared information.

Vince
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Old 03-09-2007, 09:09 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!


ORIGINAL: cougar347

I promised photos, so here they are.

I used the "Maudib Mounting System" for my C & H ignition module. Other photos show the engine mounts, throttle servo position, fuel tank location and the tray I made to mount my receiver. I also made a tray to mount my battery under the turtle deck, but I'm going to wait and see how the CG comes out before I make that permanent.

It has 5625 servos for the elevators and ailerons, and a 5985 for the rudder. I'm probably going to use a 3004 for the throttle, just because I have a ton of them. I plan on running everything on 6V for the speed.

It's going to take me a while to figure out how to cut that cowl and not butcher it. I've been looking at all the photos of the B40GT's that have been in this thread and plan to use them as a reference.

This is a great thread and I appreciate all the shared information.

Vince
Hey Vince,
LOOKING GOOD!!!!

It looks like Flying weather is goin to our areas!!! Im hoping to get out this Sunday.

Cya...
Old 03-09-2007, 09:18 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!


ORIGINAL: cougar347

I promised photos, so here they are.

I used the "Maudib Mounting System" for my C & H ignition module. Other photos show the engine mounts, throttle servo position, fuel tank location and the tray I made to mount my receiver. I also made a tray to mount my battery under the turtle deck, but I'm going to wait and see how the CG comes out before I make that permanent.

It has 5625 servos for the elevators and ailerons, and a 5985 for the rudder. I'm probably going to use a 3004 for the throttle, just because I have a ton of them. I plan on running everything on 6V for the speed.

It's going to take me a while to figure out how to cut that cowl and not butcher it. I've been looking at all the photos of the B40GT's that have been in this thread and plan to use them as a reference.

This is a great thread and I appreciate all the shared information.

Vince
Looks good. Where did you get those standoffs, they look heavy duty?
Old 03-09-2007, 09:40 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!


ORIGINAL: cougar347

I promised photos, so here they are.

I used the "Maudib Mounting System" for my C & H ignition module. Other photos show the engine mounts, throttle servo position, fuel tank location and the tray I made to mount my receiver. I also made a tray to mount my battery under the turtle deck, but I'm going to wait and see how the CG comes out before I make that permanent.

It has 5625 servos for the elevators and ailerons, and a 5985 for the rudder. I'm probably going to use a 3004 for the throttle, just because I have a ton of them. I plan on running everything on 6V for the speed.

It's going to take me a while to figure out how to cut that cowl and not butcher it. I've been looking at all the photos of the B40GT's that have been in this thread and plan to use them as a reference.

This is a great thread and I appreciate all the shared information.

Vince
One thing, having your ignition on the same side as muff might throw off lateral balance. What I do is put my rudder on the edge of a table and hold the spinner in my hand to see what wing drops and then adjust battery till its level. I do this when plane is fully built.
Old 03-09-2007, 11:13 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!


ORIGINAL: FLYMIKE


ORIGINAL: cougar347

I promised photos, so here they are.

I used the "Maudib Mounting System" for my C & H ignition module. Other photos show the engine mounts, throttle servo position, fuel tank location and the tray I made to mount my receiver. I also made a tray to mount my battery under the turtle deck, but I'm going to wait and see how the CG comes out before I make that permanent.

It has 5625 servos for the elevators and ailerons, and a 5985 for the rudder. I'm probably going to use a 3004 for the throttle, just because I have a ton of them. I plan on running everything on 6V for the speed.

It's going to take me a while to figure out how to cut that cowl and not butcher it. I've been looking at all the photos of the B40GT's that have been in this thread and plan to use them as a reference.

This is a great thread and I appreciate all the shared information.

Vince
Looks good. Where did you get those standoffs, they look heavy duty?
Thanks Mike.

The standoffs came from these guys:

http://www.litepilots.com/enginestandoff.htm

They are a little on the heavy side, but with the extended length, I figured a little extra stability would be worth it.

Vince
Old 03-09-2007, 11:17 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!


ORIGINAL: FLYMIKE


ORIGINAL: cougar347

I promised photos, so here they are.

I used the "Maudib Mounting System" for my C & H ignition module. Other photos show the engine mounts, throttle servo position, fuel tank location and the tray I made to mount my receiver. I also made a tray to mount my battery under the turtle deck, but I'm going to wait and see how the CG comes out before I make that permanent.

It has 5625 servos for the elevators and ailerons, and a 5985 for the rudder. I'm probably going to use a 3004 for the throttle, just because I have a ton of them. I plan on running everything on 6V for the speed.

It's going to take me a while to figure out how to cut that cowl and not butcher it. I've been looking at all the photos of the B40GT's that have been in this thread and plan to use them as a reference.

This is a great thread and I appreciate all the shared information.

Vince
One thing, having your ignition on the same side as muff might throw off lateral balance. What I do is put my rudder on the edge of a table and hold the spinner in my hand to see what wing drops and then adjust battery till its level. I do this when plane is fully built.
Thanks for the thought about the lateral balance Mike. I considered that, but the length of the plug wire made the fit better if I put it on that side of the engine box. I'm figuring I can move my batteries around inside the fuselage to get the lateral balance as well as the CG where I want it. If not, I'll have to cut four slots on the other side and relocate the ignition box.
Old 03-09-2007, 11:50 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

Your welcome Vince, I am letting mine sit and airbrushing another plane. Ran out of money trying to make it as light as possible.
So thats the 40cc? Battery can go to the other side of fuse, but if you really want to lighten it up, I would get those HUGE standoffs off of it and take a look a horizon ones for evo 45. Get shorter ones so the plug will reach. Just a thought. But you did already spend alot on those.
Old 03-09-2007, 11:58 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

I remember what Maudib once said, shorter standoffs makes stronger support and less vibration.
Old 03-10-2007, 10:57 AM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

It's true... but if the plane doesn't have a long enough motor box to suit your specific engine... you gotta get it out there someway!

It would be nice to have a floating engine box... something that has 2"-3" excess and a firewall that's not attached.

But the vast majority of builders don't want to have to cut the box (or maybe don't have the tools to do so) and designers/manufacturers don't want to place that step (VERY important for thrust angles and durability of the assembly) into the hands of petentially inexperienced bulders and therefore let mounts and standoffs make up the difference.

It's been somuch in the past... and guys will say how bad a plane flies of climbs, or needs elevatorup trim, etc... and it's the inaccuracy of the firewall installation that is the culprit.

Same thing with engines with long shafts... while I can't speaj from direct experience... I hear the Brison Revolution 52 is quiet a vibrator because of the long shaft out from the crankcase... the further centrifugal force from a surface... the more vibration is generated.

This is why you hear us constantly mentioning balancing props and spinners... as every little bit of unbalance you allow out there is magnified into the fuse and down to the tail and servos... engines provide more power as well as they are not fighting the centrifugal force in one direction.
Old 03-10-2007, 06:52 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

I posted this on the other EF Yak thread as well, because I need an answer as quickly as possible:

OK guys, here's my dilemma. The Brillelli 40GT comes with this nice phenolic venturi for the carb. If I leave the venturi on, I have to cut a big hole in the side of the cowl to clear it.

Do you think I'll see a big performance drop off on the motor if I leave it off? I'd rather not have to cut the cowl if it doesn't make that much difference, but my gut tells me that I should leave it on and cut the cowl.

Thanks,

Vince
Old 03-10-2007, 07:02 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

How close to the cowl will the carb be without the stack?

If adequate (1/2" or more I'd say)

The stack can be removed... but you will need shorter screws to put the carb on... OR you can remove the stack, dremel the cone off the base and then reattach the carb with the base still on.
Old 03-10-2007, 07:32 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

I can't tell exactly how close it will be to the inside of the cowl without the stack, but I'd guess maybe 1/2" clearance or more.

My problem wasn't removing the stack, I'm OK with that. I wouldn't cut it just in case I wanted to reinstall it, I'd just get the shorter screws. I was just worried about what removing it would do to the performance of the motor. I'm thinking Scott put it on there to enhance the top end and gain some RPM's.

Vince
Old 03-12-2007, 04:11 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

Short stack gains RPM's long stack gains tourqe . To a certain extent of course,the stock stack is for sure tuned to the bore and stroke of the engine to get good tourqe and HP figures.
Old 03-14-2007, 06:07 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!



ORIGINAL: Josey Wales

Im a Maudib disciple!

This doesn't mean we have to shave our heads and drink the poison koolaid does it?[:@][:'(]
Old 03-14-2007, 06:59 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

Tee hee... well if ya wanna look like me you GOTTA shave your head... LOL But let's just be glad we can all share... I learned a GREAT tip from Josey... using twp pieces of masking tap above and below your hingepoint and cut the hole out of the tape... When everythig is essentially dry (or a little before) peel the two strips off for a aqueeky clean hinge job...

I gott get me a Tamboreen and play at the airports singing the Blaad of Josey Wales...
Old 03-14-2007, 07:48 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

Ill try that.I still have to hinge my ailerons,Thanks!
Old 03-14-2007, 08:21 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

See? Another Josey disciple


Old 03-14-2007, 08:33 PM
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Default RE: Extreme Flight RC Yak 54 - 74 inch!

Count me in, my head is shaved too. [8D]

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