ckreef

I have a kit build where the directions call for 2 degree down thrust and 2 degree right thrust. It has a slightly hopped up motor so what would be better ????

Option A: Closer to 1 degree down thrust and 1 degree right thrust or ..................

Option B: Closer to 3 degree down thrust and 3 degree right thrust.

The basical question pretains to down & right thrust - Is it better to be a little less or a little more ???

Roguedog

Really hard to say either way as you did not mention the type of plane. I would suggest listing the plane model and asking if anyone else needed to set it differently.

I'd say it would depend on the type of plane, and what your plan to due with it. If it's just a sport plane or slow flyer and you just want something to fly go with the 2 down 2 right.

If your planning on competition or just wantto set it asaccurate as possiblethen you will be flight trimming. If it's a proven design then start at 2 and 2. If not, start at 1 and 1 then adjust as needed fromflight trim tests.

I would not recommend setting the thrust at 3 anything to start. I have a 50FSR on a Kaos, not built by me, that had 4 down 0 right and after getting to the point where I was stacking washers I decided to just shave the back of the motor mount on my belt sander. Was a major PITA to fix as I had to make alot of extra flight trim tests to get the thrustwhere it needed to be.

bikerbc

There is no difference between a slightly hopped up motor or aslightly bigger motor..The airiplane needs 2 degrees down and 2 degrees right thrust if thats what the plans call for..You can adjust from there if nec but you probably won't need to...

guamflyer

Its kinda like the guys say, it all depends on the type of aircraft. and also what you'll need to take into account is the airfoil ,decalage ,incidence on wing and tail. but I agree with the 2 and2 as a start. i got some planes that vary alittle and sometimes alot. for taking off from a runway I tend to use 2 and 2 for handlaunch stuff its mostly just 1 and 1. what I mostly do is set everything andadjust tillmy elev sits level for normal flight

guamflyer

Zor

You have to understand the effect of these offsets and decide based on the style of flying you enjoy with the specific model.

What am I talking about ?

Example ___
Normally a model is setup with incidence angles (decalage) such that it flys hands off with neutral control surfaces at a specific speed and power setting.

Now about your style of flying; normally an increase in power is used to establish a steady rate of climb but you may wish the result to be remaining at the same level and just gain speed.

When doing aerobatics you may wish a loop to be in a vertical geometrical plane and have a minimum of effect due to full power on the way up and lower power on the way down and out of the loop.

Like many already said the final settings are done by actual flying.
The stated values on drawings or manuals are just a starting guidance.

Have fun experimenting.

Zor