scratch built c130
 

anyone building a c130 fro scratch as i am.....mine is 13'6" ws.. planning 4 os 65's for power. with syncro, and plug drivers....body about done.wingd 30%.... comments anyone.

RE: scratch built c130
 

What/ No pictures?

Dave

RE: scratch built c130
 

pics will be posted in the next cpl of days.. got to take them first.
john

RE: scratch built c130
 

ok here are latest pics.. hope to start glassing within a week or so.
john

RE: scratch built c130
 

John,
That looks good since you sanded all the foam blocks. Any idea of what the overall weight is so far?

Mike

RE: scratch built c130
 

not weighed it yet.... i'll do that tues and let you know current weight.
john

RE: scratch built c130
 

Did u do the plans your self or did u download them from a site???

RE: scratch built c130
 

the plans are from a 1956 set of control line plans.. it was 6 foot. and i had them inlarged to 12 foot plus.. so iam using the outlines and going from there on putting it together. its getting big and heavy...

RE: scratch built c130
 

weight the plane.. body in pics 19 lbs
wings 4 lbs each
center section 3 lbs
total 30 lbs so far.. est finished 50 to 60 lbs
john

RE: scratch built c130
 

John,

Your numbers make me worry that my built-up AC-130 will be heavy. I would have thought you foam construction would have been very light. Personally, I'm hoping for a 40lbs target weight-dry. I will have to be very light when I glass my project to prevent any excessive weight.

DO you think you .65s will be enough engine? You might need to jump into the .90 motors if it gets too heavy.

Mike

RE: scratch built c130
 

That is one heavy model there, foam construction is always bit on havy side Vs built up ones but blue foam is much more havier then white foam. I experimanted this before making my S Connie model and then decided to go white foam. Did you hollowed the fuselage or its full foam blocks still there?, i would hollow the fuselage if possible to cut down considerable weight.

If there is a possibility, try to make new wing cores from white foam also, this will cut down more weight and plane will fly better. Only parts i made from blue foam is the tailplane section and that is only due to 3 fins only as i needed alot of strength there.
Are you planning to balse sheet the wings and fuselage or just glass it directly?.

RE: scratch built c130
 

planning to glass body and wings.. tail is going to be fabric covered.. auto paint for finish maybe.
the spars in the wings are carbon fiber.. just like the windrose that i built with 50 foot wings.. maybe i will have to go to 90s... i'll 65's first.

RE: scratch built c130
 

forgot to add
the foam on the body is only a inch thick in most places.. the formers were lightened
so the body is pretty hollow. tail surfaces are on the heavy side... thats why all the holes.. took off about 2 lbs.. i'm going to have 3 battery packs and motores are ahead of cg.

RE: scratch built c130
 

Do you know what resin will you be using for the glassing, i would still make new wings if possible. that is going to be very heavy model, what is your wing loading going to be?

RE: scratch built c130
 

anybody have suggestions for the hinges.. need something strong for surfaces....

RE: scratch built c130
 

is it me, or do the wings have a slight anhedral? is this the weight of the foam itself? this makes me ask is the wing spar design up to having 4 engines mounted, with all the associate plumbing, electrics, wiring etc? may i suggest a load test, to establish this? how thick is the carbo spar at the moment? re the empennage, is that solid balsa, or sheet on frame? sorry about all the questions, better to get it right now, than at the field ;)

RE: scratch built c130
 

i love a good scratch build frfoam project, I will be watching closely.


Weskel

RE: scratch built c130
 

the carbon fiber spars are 1/2 inch by 1/4 inch tapering to the tip.. the wings will be st8 on top side ... only had one bolt in the spars to take pics. the body is stringers and foam.. i now have everything glassed.. doing the the tail in 1.7oz dacron... one primer coat on and started sanding... i'm planning two coats of primer.. most of it will be sanded off.. maybe auto lacquer for finnish,, not decided yet.... working engine mounts at present.

RE: scratch built c130
 

Looks good. But after I got it all glassed I would reach inside the fuse and remove as much as possible of the excess foam and bulkheads... Four 65's will fly 50 lbs but loose and engine or 2 and your in trouble...

RE: scratch built c130
 

weighted the c130 today.. 38.4 lbs minus eng and batt and electronics......and paint

RE: scratch built c130
 

gettin down to final assembly.. doing wiring (130 feet) . mounting servos. pics coming shortly.

RE: scratch built c130
 

ok guys here are the lastest pics..
1 is the elec
2 is the main wiring from wing, total used 130 feet
3 pipe is exhaust from motor... muffler modifyied so it is behind motor in the nacel.
4thru.. misc photos.

RE: scratch built c130
 

here are the pics

RE: scratch built c130
 

more pics

RE: scratch built c130
 

try again

RE: scratch built c130
 

more pics

RE: scratch built c130
 

weighted the c130 today.. going to be right at 61 lbs with out fuel.....

RE: scratch built c130
 

ok guys here are some more pics.. will load two or three per repley.

RE: scratch built c130
 

more pics

RE: scratch built c130
 

61 lib' with out fule !!!!!:(:(

man you are way way over the top , this model is 45 lib' top .
your engine is to small for the job .
you must to calculate your wing load .

do some homework before trying to fly it .

best of luck

cobi

RE: scratch built c130
 

your not going to have enough motor for that plane . if it does get off the ground its not going to make it in turns unless you flate turn it with rudder. might need to get bigger motors.
carl

RE: scratch built c130
 

im thinking maybe a cpl 120 or 31cc gas motors myself i would go with gas cheaper to run. plus you can have one of the motors run backwards to counter the torqe. makes twin r/c planes fly so so much better i do all mine that way

RE: scratch built c130
 

Longflyer,

Whats the latest updates on your Herky bird, waiting to see if you changed the motors or flew it with present ones....personally as other suggested i'd go with bigger motors but then it's up to you.

RE: scratch built c130
 

still not flown yet.. wait on tx to come back from repair.. broke ant on it.

RE: scratch built c130
 

What does lib' and fule mean?

RE: scratch built c130
 

sorry lbs and fuel.. too late at night...
john

RE: scratch built c130
 

here is cpl of pics.. one shows the block it was towing....3/4 throt... one is all four runing

RE: scratch built c130
 

So when is the big day and we want to see it's pictures or video.

Plus looks as you have more then enough wing on both O/B panels, should be a good flier...

RE: scratch built c130
 

ws is 14foot with os65..65lbs talked to guy with 12foot ws and 55lbs and 51's on it.. he say his flys like a trainer....... if mine tows the block. is should fly.. hopefly on the oct 5th is th big day............................

RE: scratch built c130
 

update first flight moved back.. cannot keep engines running reliabilty... going to remount to horz position instead of inverted...