H9 extra mods
 

Hi guys,

I may be bringing up an old subject but its new to me. what if any are the recomended modifications to the H9 33% extra?

I have a BME 102 to hang on the front. Hitec digitals all around. was planing on pull,pull on the ruder.

and finally, are there any balance/ cg issues youve experienced and what is the realistic( :) ) weight i can expect

thanks

Hubb

H9 extra mods
 

If it is the newer version with dual aileron servos... you can just build it stock. IMO the fuse is a little weak to lighten much... unlike the H9 CAP. Just don't add any unnecessary weight. Use a minimum amount of light ply to get your gear in and use light gear. CF wing tube from DA, 3.5" Sullivan Skylight wheels, lightened backplate on the spinner or better yet, a CF spinner from Pierre. Every little bit helps. This plane has more of a tendency to come out tail heavy that nose heavy... so pull/pull will work out fine. It also is more forgiving tail heavy than the CAP. Plan on about 27-lbs on an accurate scale with the BME-102.

H9 extra mods
 

thanks for the info Joe,

this is the earlier version with one ail servo. what are your thoughts on using one hitec 5945 per ail. (comparable to an 8411) or should i still use two per ail?

I heard the weights were higher than advertised 26-27 seems about right, I did not know of the tail heavy condition though.

any other thoughts

appreciative as always

Hubb

H9 extra mods
 

I think one high quality servo like the 5945 is fine. But, make sure your using rigid rods... I would definitely want to use the H9 Titanium rods. Also... two things that would help take some pressure off the servos towards giving in to flutter... one is to lighten those heavy ailerons... and the other is to use a counter balance weight on the ailerons.

H9 extra mods
 

JBH:
How do you lighten the ailerons??

Oscar Silfa

H9 extra mods
 

Strip the covering and get your 1-1/2" +- holesaw out. :-)

H9 extra mods
 

Thanks
JBH
I have this plane with two servo X ailerons,actually I'm working in it but much people use 100cc engine and I have a 3W85-b2 for this plane i like yours comments!

thanks

H9 extra mods
 

I had a 3W-85 on mine, too. It flew great... it really is a nice flying plane. :-)

H9 extra mods
 

What type of prop are you test ?
What is de range of rpm?
Do you use 3W tuned Muffler?
I'm going to use tuned muffler from 3W.I apreciate all information about.

Thanks
Oscar

H9 extra mods
 

I used the standard mufflers, I sold the plane awhile ago, but I think I was using a 24-10 3W prop.