IMAC PAU Extra Build 105" assembly

[Rusty 73]

Here is some more photos of the more extensive baffling i did for the 120 .
I was looking at the Red Bull Race aircraft and the engines they use are completely baffled over the top of the engine.
The air come in from the side cowl inlet and is force over the top of the engine and out through the fins focing air to cool the fins .
So i decided to put a vertical baffle above the engine firewall to prevent the air from going passed the heads.

l also extended baffle on each side of the fire wall down and allow enough room on the side for the air to escape out the bottom
of the cowl and down through the pipe tunnel . I'm concerned about allowing the air to flowonly out the bottom of the fuselage .
I am even taking step to sheet in all the lighting hole on the plywood floor of the fuselage so the air only exits out over the pipes and not into the fueslage
were i can increase the heat around the receiver .
Enough talking here's the pic's

the front of the cowl giving everyone an idea of how i changing the air flow pattern .
this first photo you can the baffle on top of the firewall will use high temp silcon to seal the gap between the baffle and the top of the cowl to maximize the seal .

 

[Rusty 73]

I was planning on using this nice secraft mount for my throttle servo but found out that the servo bolt holes don't align up .

I found an extra plywood servo box that was included with my 3DHS so i will use this instead .

 

[Rusty 73]

So I'Ve BEEN BUSY getting the pipes into their final mounting position .
Not much carbon on this piston

This is the left header and pipe installed , used boiling water to soften the teflon adapter before sliding it onto the the pipe .
It slipped onto the header alot easier

Found getting those 6-32 bolts and nuts into the front bracket a little bit of a hard the rear one i should have turn around so i could access the nuts from the rear openings of the pipes . OOoop my mistake



Used RTV high temp silicon to lay a thin base onto the header then placed the aligned new gasket and pressed together only dried twenty minutes before
i assemblyed the header to the pipe.

The plywood mount fastened to the DA .

You can see the gasket on the header already to assembly

The ignition will go onto the removable hatch in the firewall area .
Can't find any info on which plug go to which cylinder ?

Just a reference picture i had to remove the front plate where the diaphragm is and replace it with a DA
updated diaphragm plate .It has four holes , two on top and two on the bottom to allow better atmosphere pressure againist which should improve metering of the float bowl . It's a works add-on part avaiable from DA parts store ..

Now that looks nicer and better metering performance too.

Has anyone looked carefully at the reed block ? It looks like the reed in my block don't make a complete seal against the housing .
You can see that in the middle , it doesn't seat flush . Has anyone else noticed this in their DA 120 , it seems odd.

So this is my update on where i'm in the final assembly process, it's been fun and education .

Thanks for following Rusty

 

[orthobird]

looks like you are almost there. Looking good Rusty!

 

[Alky6]

Looking forward to the maiden report!

 

[Islandflyer]

Short clip of this plane from last week:

https://www.facebook.com/video.php?v=1849919435267818

 

[Snoopy1]

You did a nice job of baffling around the engine. That always takes time and patience to do it nicely. Good job next is to fly it good luck.

 

[orthobird]

Man, that guy is hucking it and hucking it real low!!! filmed in Hawaii?

 

[Rusty 73]

You did a nice job of baffling around the engine. That always takes time and patience to do it nicely. Good job next is to fly it good luck.

Thanks Snoopy1 getting the template close and then cutting and sanding the baffles to get a proper fit is time consuming .

 

[Rusty 73]

Great video, love how low he can Huck that Extra PAU around .
The Pilot looks like Gabriel Altuz from Puerto Rico from team PAU, man can he fly ..