installing spoilers - RC Groups
Thread Tools
Feb 06, 2002, 06:03 AM
allergic to castrol oil

installing spoilers

ive almost finished building an old airtronics sagitta 900 and im installing a set of graupner spoilers
i have a set of super micro servos ,has anybody ever had any experience mounting the servos direct drive to the spoilers?? [by meanind direct drive, i mean direct to the servo arm] ramair
Sign up now
to remove ads between posts
Feb 08, 2002, 12:22 AM
Registered User
danny_isr's Avatar

sagitta 900

Hey , i just got a Sagitta 900 on this weekend on an Auction.
new never been flown. Still without servos.

what servos u using there , battery and RX ?

Are you going to high start it , what kind of hih start ?

Feb 08, 2002, 06:29 AM
allergic to castrol oil

servos for sag.

hey danny in using a hitec 555 micro rx two hs 55servos for rudder/elevater,700 mah 4 cell AA bat. pack with two super micro mpi 50 servos for the soilers
no im not going to high start it because its a little big for that, i could though but it takes a lot of life out of my highstart [dynaflite standard high start]. i have a whinch which is great but im really spoiled!!! i have a tow pilot for aerotowing and that is what i will be doing with mine!! ramair p.s. can you get towed up?? have you ever flown a 900??? or seen one?did you just buy the plane,but no nothing about it??
Feb 08, 2002, 06:59 AM
Registered User
R. Carver's Avatar
Ramair, WHAT kind of servos are you using for the rudder and elevator?!
Feb 08, 2002, 08:14 AM
allergic to castrol oil


im using hitec HS-81 servos for rudder/el
sorry my mistake ramair
Feb 08, 2002, 11:50 AM
I care about rising air !
MTT's Avatar


Ramair, I have never connected the servos directly to the spoilers (Schempp-Hirth type) ,but very close, with conn. rod about 1" long, worked just fine. I think connecting then directly wouldn't work, since the servo arm makes a rotary movement, and the spoiler actuator arms make a lareral movement.

Feb 08, 2002, 12:18 PM
allergic to castrol oil

thank you

thank you for the info

i have decided to use a short conn rod as mentioned
i was also wondering if you might know how much toque i need for rudder/elavater on a hundred in poly ship?/
does 32 oz sound about rite???
Feb 08, 2002, 12:28 PM
Registered User
danny_isr's Avatar

high start

you can easly high start it.
if you buy the right high start

I never seen one. i knew nothing when i got it.
About the toque im sure 81 will do the work. Freind here got a Seira in the same size - and that faster ship. and he uses 81s.
Feb 08, 2002, 04:21 PM
allergic to castrol oil


hey danny that sagitta is a glider that is old tech but its a real nice thermal ship
i have never known anyone that doesnt like them
i had this kit in the box for ten yrs and i could havesold it a few times for twice the money [its a keeper] i see now there is a place in ca.that sells them again
it loves to thermal buy itself and it will kind of slosh the tail around in turns and stays flat in turns
you will love it!!!
in todays standards some will say its a dog but most of those guys fly threw thermals with there sleak ships
the sagitta reads lift very well,i would have to say that its one of the best poly ships that i have flown enjoy!! ramair
Feb 08, 2002, 04:32 PM
Registered User
danny_isr's Avatar


not the best pic ...
Feb 08, 2002, 04:34 PM
Registered User
danny_isr's Avatar

another one

sharper this time
got it with the plans.
Feb 08, 2002, 05:43 PM
allergic to castrol oil


nice but you might want to change the spoilers the stock spoilers always stay open ramair
Feb 08, 2002, 05:59 PM
Registered User
danny_isr's Avatar


really , why is that ? the guy that built it , installed weight under each one. isn't enough with the wind together ?

Feb 08, 2002, 08:12 PM
Never stop learning!
I can attest through my experience that you want a MECHANICAL means of holding those kind of spoilers down. A pain to set up, but worth it when they dont open uncommanded!
Feb 08, 2002, 08:15 PM
Registered User
danny_isr's Avatar


soud easier just not to use them

Thread Tools