22" please

 

so do you think the nose and canopy will still be the same?

 

okay and about the servo holes... i don't even know which ones are what. lol
and do you think 9 gram servos are gonna be enough?

 

if Im allowed to get real painful, can you guys put grooves in to run flexiable pushrods out to the ailerons? seems like that would be better then the crooked rigid arms shown. I know, aweful chooseie for a begger

 

really only need 1/8" wide, 1/8" deep, running to the center of the airlerons. nice large arc is all.

 

Shaun you are awesome, thank you! Yes I agree about servo choice.

 

wow thanks shaun.
does anyone else think that the elevator should have the most servo power?
if so i will use the servo i got for my wing sweep for the elevator.
that would be plenty.

 

Wow, I love the F22 birds I have in my home squadron and it looks like they will be getting another brother ( or maybe two )
Shawn, I know you did the 200% for 1/2 foam and I am wanting to try that as well but what are the chances that you can make it fit the safe cutting area and use 1/4 bluecor? Multible sheets will be fine. I just tend to like the bigger airframes.

 

ahhh nooooo it would be so much better and more sturdy with 1/2 inch foam!!!!
but i did get to my dads shop yesterday morning and i got one of the normal size f22s cut out and ready to build, Shaun i think you need to make your tabs a lil bit bigger.
our parts kept getting caught and stuck.
but while we were at the shop we also got some of the 1/2" foam test cut and it cut just fine all the way through at i think 120 ipm
so we are getting closer to building this 200% monster and it is going to be AWESOME!!!

 

idk my dad and i have the worst luck with v tabs
we use t tabs on everything now

 

Hey shaun, We actually had Z set where it was barely cuting through the plastic. maybe our FFF is a bit thinner than normal (good chance of that). Also our problem may be we still use the bit supplied with the PP. The end is almost a ball cutter, which has to contrubite to the wiping out of the tabs. To have Z go through enough to actually cut the plane out, cutter is 1/16 through the foam.

IDK, like Alex said, we are back to "T" tabs, cuz they just give us better results for the wavy FFF. But none the less, after wrestling with it, the results are always worth the effort!

 

.240!! - lol ours is .214!!! I want yours!!! I bet that explains a lot about issues we have across the board. (no pun intended)

I agree, T's are a safer bet for public distrubtion. and I personally don't mind cutting them, after all I used to have to cut the entire thing. Now I only have to cut some tiny little bits.

On the subject of foam thickness, the "1/2" inch foam we are gonna use measures .570! I guess the moral to this story is, if you want true thickness, don't use foam. But I'm hooked, so I will just keep adjusting for it

 

That's why I set my V-tab at 1/2" wide, and the material at 6mm - they're only that wide if the material is full thickness (or more), but there will be some tab material left if the foam is less than 5mm. To each his own workaround, I guess.

 

I have one of these started and on the build table as my Youngest Son has not sent any finances to finish the P-51 yet... Going to have the Ailerons and the split elevators connected together and operating as Elevons. My other Son also started one but his is just hanging on the wall not finished. Posting a few pics... Mudman1959

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10/20/2011 Got a little time to work on it today... Reinforced all of the edges with bamboo skewers. The Ailerons and split elevators are connected together for a Elevon type control. Cut out the rudders and reinforced them, I will need to purchase some flexible control rods for them... Lots to do yet, I'll let you know how it works. Mudman1959

Attached files