robbieskipton

Hi All,

Here is what i have been doing for the last few months. took me 7 months to design and so far 1 month to get this far

specs what it will be

Wingspan - 4.7 meter
length - 4 meters
engine - 425 5 cylinder radial ( moki)
servos - 18 x jr8711

All Day Dan

My Feedback: (5)

A spectacular project. Keep it going. I'll be looking forward for the maiden. Dan.

robbieskipton

Will Keep it going now, hoping to get all the wings complete and hinged by mid september, then start the fuselage, however... i cant build it in garrage, so restricked by the good old british whether...

I Will Say tho.

I must thank one member on here as he helped me alot.. Brent Good.. What a genuin Guy, He truly is a good friend of mine although a pond seperates us But im hoping in the future to get over to States and Fly her there

More pics to come very very soon.

Brent G

My Feedback: (5)

Robbie

Found you!

Thanks for sending over the pictures of the plane. It looks great. I have subscribed to this thread so I can watch the progres. I tried to send you a email but it kept coming back as blocked. Don't know what is going on there. Things have been going good with my new designs. I am in negotiations with a kit cutter to sell kits of my planes. He has also asked me to design a line of profiles. I am currently working on scaling up the 100cc to 150cc. I am getting ready to start building the 100cc plane with some small design changes. Here are some pictures of the prototype 100cc yak at joe nall and a video of one of the planes being flown a couple of weeks back.

http://www.youtube.com/watch?v=rtUG6YsNgDo

robbieskipton

hi all, here is a little bit more o the build so far.

still making mods as i go along, but its going well

Hey Brent, unsure why it bounces back.......ill send you another email, and see what happens . Hope that you get what you desire out of cutting this beast

robbieskipton

WellF Folks, here are a few more pics to those who are interested, Practically complete now , just waiting for the CAA to pass it off so we can get her finished

robbieskipton

Pics

robbieskipton

Few More

Brent G

My Feedback: (5)

Robbie

Looks pretty impresive. I hope you can get it over to the states so I can check it out in person. I am about 75% finished with my 150cc drawings. The biggest pain is drawing the tunnel. The tunnel makes everything harder but guys want to be able to run cans or tuned pipes. Keep the pictures coming.

robbieskipton

Hi Brent,

Thats the one thing i decided to get rid of on my design, i didnt see the point in it, the reason is, on my composite arf extra, the pipes just run right through and on my composite pitts the greeves pipes ( 3 foot long) run straight through, without a tunnel.people think that pipes get hot, i belted my extra round the sky at full chat for 10 mins, and then measured how hot the pipes got, they got to 47 degrees... as long as they have airflow over them and a methord of getting out the hot air ( out fuselage) there is no problem

i think manufactures suggest the pipes are mounted with a 10mm gap around them as a minimum.....with air flow around them, so i wouldnt worry too much about it mate

robbieskipton

ohh btw, engine has changed from origanal suggested above.. its now going to be 3W 342 TS as i have been sponsored by 3w
and the weight is going to be 95 lbs

i did a comparisn to my composite arf 3.1 meter extra as well.........

Wingloading on super extra

39 oz per square foot.

Wing Loading on 60 % Yak 54

36 oz per square foot.

Power to weight ratio of super extra

42.9 oz thrust per pound

Power to weight raition of yak

52 oz of thruse per pound .

So this beast is going to prop hang.YAY

Brent G

My Feedback: (5)

I like those numbers. It looks like I missed the weight of the plane by about 5 lbs. I think I was guessint it between 85-90. That 342 actually put out around 300Lbs of thrust? That is unreal. At those wing loading figures that thing is going to fly foamy light.

Brent

robbieskipton

LOL. thats what im kinda hoping it will be like, will be an out and out 3d machine

modelbouwerke

hi,

I'm from Belgium and I'm looking for a plan from 80 inch.
Would you like to share the plan of the yak 54?
I like to build my own planes but I'm tired of ARF planes
Would you help me with it?

best regards

ivan baeyens