They can also effect the trim a fair bit so once you try them out you might want to mix some elevator in.
PS.. too late now but usually the spoilers are positioned more outboard on the wing so that the wake they create doesn't mask the horizontal stabilizer. I appreciate that wing thickness might have prevented them going further out.
Will be putting spoilers in my Sailaire. The photos helped me see what folks are talking about
A giant scale Sailaire WITHOUT spoilers? That must be a real SOB to land anywhere close to the pit area
For the other wattflyer readers, you just can't yank a giant Sailaire around 10 feet off the ground for another approach to the landing area.
I installed spoilers on my two giant scale 10 foot wingspan Craftaire Viking sailplanes. Those spoilers made it easy to land within a few dozen feet of where I was standing. Without them, it was a . I had those Vikings in the mid 1980's, and sold them in the mid 1990's.
Retired and the days are just too short, busier than ever!
Power planes that hate to slow down... first thing that comes to mind it excess prop pitch.
Calculate pitch (inches) X rpm (max throttle holding the tail on the ground) / 1000 = ? (mph)
This gives a very good estimate of how fast the prop WANTS to pull the airplane. If its about 1.2 X actual level flight @ max throttle you have a good prop choice for most purposes. If its more than 1.5 X actual level flight max then you have the wrong prop. Pylon racers can approach calculated pitch speed = actual sustained level flight speed.
Second thing you can play with is reflexing the ailerons upward as "spoilerons" This often lets you hold a more nose-up attitude without dropping a wing, presenting the bottom of the wing as a big air brake.
Wagging the rudder helps bleed speed but you can cause a snap into a spin if you get too aggressive about it.
Well I gained height ... flipped the switch and she bled height with a nose down pitch that was without any roll or nasty vices. The decision now is whether to mix in elevator with spoilers to reduce the nose down or do it by stick.
I didn't get chance to use for landing as I mistakenly fitted a 'used lipo' instead of a charged one ! Had an unexpected 'distant' landing !
I only set the blades to raise about 35% of full ... so amazed at the effect.
Recc'd ? Yes. But I would advise using linear servos to reduce installation height.
Once I'm back flying - I will try get a video of them in action.