• Active Topics  Back Forward Stop Play

Composite Cowling And Turtle Deck

The Smithsonian National Air and Space Museum credits the Laser 200 for bringing about a new generation of aerobatic aircraft
youngman1
MPF Rising Star
Posts: 14
Joined: Fri Sep 09, 2016 8:29 am

Composite Cowling And Turtle Deck

Post by youngman1 » Sun Feb 19, 2017 5:35 am

Hello All

In the next few weeks i'll begin making the buck and then mould for the top cowling and turtle deck on my Lazer Z200 project.

I was wondering if you guys have any experience doing this. Most specifically i'm interested in hearing peoples experiences with layups. Or suggestions on what would work. How many layers and of what? I see Bully Aero have done a really nice new Pitts cowl. I'd love to know what layup was used. And where if any strengthening was placed.

I'm undecided as of yet whether to go for wet lay with vacuum bagging or resin infusion. But happy doing either.

Any thoughts, opinions and advice welcome!

Guicensoni
MPF Competitor
Posts: 34
Joined: Sat Sep 10, 2016 10:37 am
Location: Brasil
Contact:

Re: Composite Cowling And Turtle Deck

Post by Guicensoni » Mon Jul 17, 2017 9:23 pm

I'm just finishing my cowl and turtledeck made of 3 lays, 2 carbon une glas sandwich, some enforcement on the turtle to rigid it.
Attachments
IMG_6315.JPG
IMG_6315.JPG (164.99 KiB) Viewed 610 times
IMG_6237.JPG
IMG_6237.JPG (178.76 KiB) Viewed 610 times

Guicensoni
MPF Competitor
Posts: 34
Joined: Sat Sep 10, 2016 10:37 am
Location: Brasil
Contact:

Re: Composite Cowling And Turtle Deck

Post by Guicensoni » Fri Jul 28, 2017 11:37 am

It's getting ready!!
Attachments
IMG_6353.JPG
IMG_6353.JPG (141.08 KiB) Viewed 586 times
IMG_6352.JPG
IMG_6352.JPG (171.5 KiB) Viewed 586 times
IMG_6350.JPG
IMG_6350.JPG (148.95 KiB) Viewed 586 times

youngman1
MPF Rising Star
Posts: 14
Joined: Fri Sep 09, 2016 8:29 am

Re: Composite Cowling And Turtle Deck

Post by youngman1 » Wed Aug 23, 2017 6:28 am

Hi

Your cowling looks great!

I've just started looking at the cowl that i have but have spotted a few issues.

The cowling is not symmetrical at all. Most noticeable at the firewall end where one of the cheeks protrudes further than than the other.

The engine mounting has the 1.5 degree angle to the right and is offset itself to the left to keep the spinner centred. This looks to be as per plans? Do all Lasers have this? Is this also usual on other aerobatic aircraft designs?

It looks like the original designer just extended the cowling on the left side to take into account the shifted engine position. Is this usually done like this? Or is it more common to make the cowl and firewall symmetrical and accept that there will be extra room along the right hand side.

As you can see by the pictures there is already a much larger gap to the cylinder head covers on the left side than the right, making everything symmetrical would really make the gap weirdly large causing possible cooling issues. I don't remember seeing noticeably different gaps on any other aircraft i've seen.

Have i made a rookie error somewhere here? Are all engine mounts supposed to be the same? Shimming will only achieve small changes but my engine is laterally over to one side so i don't see how that can be changed.

For reference, this aircraft has flown before however the engine is new.

Any help and advice greatly appreciated! We are very conflicted over what is the best thing to do here.

Thanks
Attachments
IMG_20170822_171750[1].jpg
IMG_20170822_171750[1].jpg (2.47 MiB) Viewed 462 times
IMG_20170822_171556[1].jpg
IMG_20170822_171556[1].jpg (2.65 MiB) Viewed 462 times
IMG_20170822_171923[1].jpg
IMG_20170822_171923[1].jpg (4.26 MiB) Viewed 462 times
IMG_20170822_171931[1].jpg
IMG_20170822_171931[1].jpg (4.41 MiB) Viewed 462 times
IMG_20170822_171943[1].jpg
IMG_20170822_171943[1].jpg (3.07 MiB) Viewed 462 times
IMG_20170822_171952[1].jpg
IMG_20170822_171952[1].jpg (3.41 MiB) Viewed 462 times

Post Reply Previous topicNext topic