Too much down-thrust?  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> RC Airplanes >> S.P.A.D. Aircraft - Coroplast design >> Too much down-thrust?
Page: [1]

Login
Message << Older Topic   Newer Topic >>
Too much down-thrust? - 8/28/2003 5:23:16 AM   
YS-I-DO


 

Posts: 246
Joined: 8/3/2003
From: Lewiston, ID, USA
Status: offline 		Take a look at this picture. This is why I love SPAD!! I crashed so many times today, had it been balsa, I'd have to skip a house payment! Now I see why a SPA3D makes such a great 3D trainer (not that I learn from my mistakes!). Anyway, I learned the hard way that Tatoo probably designed his planes the way he did for a reason. I drilled holes in the fuse right where the engine mount hits the LE to pass a zip tie for the fuel tank. Should have known better, but what the heck, what can I say. Out of curiosity, how long did it take for some of you to learn how to fly 3D? I'm having a heck of a time achieving straight and level flight. I'm learning how to hover very quickly, though. That's the only thing my plane will do! I tried shifting the CG, bringing up the ailerons to parallel the fuse, and down trim on the elevator. Had the plane stayed together, I was going to try some down-thrust (the easy way, with washers!). Time to head to the garage to be airworthy by Saturday!

Attachments
Click to see fullsize image.
Click for fullsize
       Post #: 1

Too much down-thrust? - 8/28/2003 6:47:54 AM   
high in da sky


 

Posts: 116
Joined: 4/5/2003
From: Lombard, IL, USA
Status: offline 		weird thing is that when you did that you probably just stood there laughing whille had it been balsa you would be looking to your wallet for a replacement.


_____________________________

You don't have to be faster than the shark, just faster than the guy next to you!

(in reply to YS-I-DO)
       Post #: 2

Too much down-thrust? - 8/28/2003 11:31:58 AM   
Capt_Kc


 

Posts: 118
Joined: 8/4/2003
From: Stuttgart, AR, USA
Status: offline 		I seen a guy reck badly! the poly board snapped and the motor took off across the field dragging the gas tank behind it! It finally hit an embankment of grass and stopped. He threw all the parts in the back of the truck and really wasn't too mad. Now if this was a balsa,,,,, I think I would have seen a melt down! Gotta love some spad. I think the key to SPAD's is getting them dialed in. If you build one in one day and it flies like s%*&, then go back to the drawing board and move the cg, trim some ailerons, or just do somthing.... I love it. You mess around and build a balsa kit and do that within the first few flights, your gonna want to just give up. I have a 34x34 spa3d with a 40la on it and a 36x36 with a 46fx on it. The 46 is built to plans and flies great. The 34 flies good and stable but doesn't have the vertical climb like the fx does. I think I'm fixen to chop the 34x34 to a 32x32 and see if she does better!

(in reply to YS-I-DO)
       Post #: 3

Too much down-thrust? - 8/28/2003 4:06:05 PM   
Highflight-RCU


 

Posts: 597
Joined: 2/28/2003
From: Houston, TX, USA
Status: offline 		I think it's rude that no one will answer newbie76's original question.

Newbie, after much consideration, I think you're going to have to add some shims to your lower engine mounts to raise the thrust angle by about 83 degrees. That should make it more stable in level flight and especially help with 3D hovering.

As it is, attempting a 3D hover might result in what's called a "Whirlygig" manuever.

Highflight

(in reply to YS-I-DO)
       Post #: 4

Too much down-thrust? - 8/28/2003 8:31:35 PM   
southern_touch9


 

Posts: 1549
Joined: 7/11/2003
From: Columbus, GA, USA
Status: offline 		Sorry Highflight I didnt mean to get off the subject either.


It looks to me that you might need to add just a tad more right thrust when you shim it up.

(in reply to YS-I-DO)
       Post #: 5

Too much down-thrust? - 8/28/2003 9:03:25 PM   
*Crash*Johnson*



Posts: 1089
Joined: 4/12/2003
From: Here, NJ, USA
Status: offline 		BAHHHH Gas er up...she'll fly.
You'll probably have to hand launch it thought
:

_____________________________

Signature strike.

(in reply to YS-I-DO)
       Post #: 6

Too much down-thrust? - 8/28/2003 11:06:28 PM   
Capt_Kc


 

Posts: 118
Joined: 8/4/2003
From: Stuttgart, AR, USA
Status: offline 		actually, with this plane, your gonna need a radio with dual rates or make the surfaces where they don't travel much. I bought a 6 channel with dual rates and made the surfaces only travel 50% one way and 100% the other. Its a whole lot easier to handle then. When I throw the switch and make the surfaces travel the full 100%, she gets reaaal squrillly, especially if your a newbie! If your new to this, this will really help out! I messed up and took off for the first time with my dual on full and it was a trick to trim it out! Looked like I was on crack fighting a mad cow! Move all your pushrod clevis's to the top notch and try to move the other ends closer to the servo. This will make the surfaces move less. Hang in there, this is a fun plane to fly if you got your CG right!!!

(in reply to YS-I-DO)
       Post #: 7

Page:   [1]
All Forums >> RC Airplanes >> S.P.A.D. Aircraft - Coroplast design >> Too much down-thrust?
Page: [1]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

1.187RCU1