miskin

ok guys ive just built my first spad3d and plan on having its first flight on sunday and i have some questions if you dont mind answering

1 will my os 50 max 12.15x3.75 prop be ok as the power.... it also has a throttle pipe??

2 my u channel is 39" instead of 36" everything else is as the plan.. will the affect the plane in anyway??

my auw is 4lb dry cg is 6" from le i had to add 15g of weight to the lefthand wing to counter act the throttle pipe...

i will post some pictures as soon (its nothing flash but i hope to have fun)

thanks miskin

rlt55

1. That should be more than enough power.
2. Not 100% sure, but I think your tail surfaces will be more effective (If that's possible). Better set the Expo high.
3. Instead of weight, maybe you could just push the 5/32"x18" spar over to the left a couple of inches.

daveopam

My Feedback: (9)

It should fly great. The amazing thing about these planes. They will fly if your anywere close to correct. I have banged and bent mine a bunch. Even bent the fuse front way over. It still flew fine. david

miskin

thanks for the reply's ....ive set the expo to -90(futaba)

as for the spars they are 36" instead of 18" and i have 3 of them ????


anyway i will update you all tomorrow as to the maiden flight went (boy im looking forward to it)

novabill

Verry good idea. Do they run through the fuse? Weight at the wingtip is better than un-balanced. I have 1oz at the end of my tip.

Recheck your balance and make sure you are no more forward than 6"
Reflex your ailerons so they are level with the fuse or slightly up.
Remember theese planes dont like speed, so throttle back once up.
Get ready for uncontrollable laughing.

I think you are going to have alot of fun tomorrow
WILLIAM[sm=greedy.gif]

miskin

novabillss

the spars in my spad dont run through the fuse i didnt know they were meant to????

the balance is 6"from LE (just were the spar is) and the ailerons are level with the fuse.. should i lift them is so how much??

thanks

miskin

novabill

The MW does'nt have to run theough the fuse, but it does add rigidity to the wing/fuse asssembly. You might try raising your ailerons 3/16-1/4" above fuse centerline as they tend to droop as they run toward the tip. It's ok to try with them level, but if you notice your plane trying to climb when it should be flying level they need to go up more.

Let us know how it flies, pics & flight report

WILLIAM

flyer_of_planes

miskin

-90 % is ALOT of expo, my only fear with that would that it'll be very gentle for the first bit, then almost snap to full deflection,

I may be wrong, but before you fly it, it mightn't hurt to watch what the surfaces do when you move the stick to full.

if it goes gentle then snaps, I'd turn the expo down a bit.

Have fun with it, that's the main thing
I know my QHOR was a BLAST, except for the 8 - 9 degrees right thrust I accidentally put in [&:]

~flyer~

miskin

hi guys

had my first maiden today but it didnt go very well[]

first of i started the engine and while it was on idle the screws to the enging worked loose ..so i replaced them with bolts .... then i was having a bit of fun hovering thought i would practice a landing and bent the undercarage right back so i thought i would just land it ... then just as landed the engine mount broke just in front of the throttle srevo so that was it for the day i had to play with my laser arrow instead...

now i could not find a poly board so i had to use 1/4 ply instead... anyone got any ideas as to what else i could use???

MikeUK

I use 3/4" ply and have not had one break yet despite some full throttle spinner first 'landings'. Its probably overkill though I would think that if you laminated 2 pieces of 1/4" togeather with epoxy to make 1/2" it should work well.

grot

Cutting board really does work much better than plywood. Among other things, it really damps out the engine vibrations. Wood just transfers them right into the fuselage.

Just did a rebuild on mine after finally dirtnapping it too hard. New wing, new engine mount. Even better this time.

novabill

miskin,

Next time you make your mount, do'nt make a servo cut-out. Mount your servo with servo tape and a zip-tie. You will have a stronger mount.

WILLIAM

miskin

thanks for the replys everyone ive made a new mount with 1/2"ply and run some ally around both sides and bolted the engine on and moved the throttle servo to behind the tank to help with the cg ...

as soon as i find my charger for my camera i will post some pics


thanks

miskin

miskin

well guys i finally found my charger for my camera so here are a couple of pics as promised..

not the best looking spa3d but it was my first (profile has'nt been fitted yet)

thanks for looking

novabill

miskin,

I think your plane looks great. Have you had a chance to fly it with the new motor mount yet? Let us know how it goes.

WILLIAM

rlt55

Great looking plane!!

Yeah, -90% Expo might be a tad too much.
I found starting at -40 or -50% works okay.
I'm getting where I turn it off while flying
and just use it for take off and landings.
I hate it when I pull back too much on take off.
The plane leaps up and wants to loop back at me!

I don't think having steel spars all the way out
to the wing-tips is doing much for you.
In a hard pull-up, 80% the wing-bending load
is going to be near the fuse.

I can't see much (if any) flex in the last 9 inches of my wings when pulling serious Gees.
Two 18" spars work just fine. I would never consider using three spars
unless the plane was overweight a few pounds

That extra steel is going to add weight to the wing. A wing that is not super-attached to the fuse.
A lighter wing should slow down better in a crash or hard landing in the weeds.
It will have more flex and take the shock better.

But WTHDIK, I'm just a newbie with only one major balsa crash under my belt
Cheers,

miskin

not yet planning to give it ago on sunday if it ever stops raining [:@]

as for the expo its now at 50% i did that last week

i will let you know how it goes