Brand New PAU........Viper-ST Announced!!!!!!!!
- Thread starter Terryscustom
- Start date
Terryscustom
640cc Uber Pimp
I love the prototype stage of projects because I love to play with different materials! I'm not going into great depth because it's off topic but I wanted to show the low pressure lip that I laid up. 5 hours or so I can pop it out and see how it will fit. Also a pic of what the finished lip looks like on my other project.
Again, production models will have this like all other PAU planes. The lip I have here is about 3/4" tall and blended to make it just slightly more effective. What the lip does is create a low pressure area behind the lip with the air flowing over the outside. This venturi effect accelerates the air behind the lip and sucks air out of the cowl faster than normal, making your cooling much more effective sometimes even with smaller vent holes
Again, production models will have this like all other PAU planes. The lip I have here is about 3/4" tall and blended to make it just slightly more effective. What the lip does is create a low pressure area behind the lip with the air flowing over the outside. This venturi effect accelerates the air behind the lip and sucks air out of the cowl faster than normal, making your cooling much more effective sometimes even with smaller vent holes
Attachments
Terryscustom
640cc Uber Pimp
Just a quick note, I thought my Sq. Inches measure was off, I will correct the front page but the plane exactly matches the last production drawing with 2185 sq. of wing area!!!! Did someone order a side of "low and slow" to go with their "wild and crazy"??
Islandflyer
GSN Sponsor Tier 1
As Terry mentioned, this plane was rushed (per request
) so we would get the prototype quickly.
The paint color match on the cowl is not good enough, so I drive 5 hours round trip today to bring the cowl and canopy to a frinds who is going to touch it up. Thank you Pedro!!!
Prior to that, I started making the lip for the bottom engine cooling vent opening. Not as fancy as Terry, but it will work.
Steps I followed:
1- Cut the opening
2- Make a lip shape out of 1/32 balsa
3- Glue in the balsa with CA (this is just to hold the shape)
4- Epoxy in a couple of layers of fiberglass
5- Make a Bondo fillet
6- A little sanding
7- Ready for paint.
) so we would get the prototype quickly.The paint color match on the cowl is not good enough, so I drive 5 hours round trip today to bring the cowl and canopy to a frinds who is going to touch it up. Thank you Pedro!!!
Prior to that, I started making the lip for the bottom engine cooling vent opening. Not as fancy as Terry, but it will work.
Steps I followed:
1- Cut the opening
2- Make a lip shape out of 1/32 balsa
3- Glue in the balsa with CA (this is just to hold the shape)
4- Epoxy in a couple of layers of fiberglass
5- Make a Bondo fillet
6- A little sanding
7- Ready for paint.
Attachments
Last edited:
Flying-Skunks
50cc
Looking Good
Torquerolljoe
Wannabe Pilot!!
I want an Arc version so I can do my own scheme!
jhelber08
70cc twin V2
@Torquerolljoe you can cover mine when I build the kit version...heck I'll even let you bag the wings for me
Sent from my iPad using Tapatalk
Sent from my iPad using Tapatalk
Torquerolljoe
Wannabe Pilot!!
@jhelber08, I might help you out. I have all the equipment. I need to finish my b25 first.