I.F.O. mach 3 - RC Groups
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Jun 14, 2001, 09:22 PM

I.F.O. mach 3

I bought this plane today. Before I start building I was wondering if there are any building tips. Also will HS-81s work for this plane? Whats the best battery?

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Jun 14, 2001, 10:12 PM
Just an average RC'er
Jim McPherson's Avatar
Build it just as the instructions say... make sure to have accelerator. HS-81's are WAY to heavy, go with 55's or better yet, 50's.

Jun 14, 2001, 11:19 PM
What Canary?
KeithK's Avatar

Sure you aren't thinking of the mini IFO? My Mk3 can handle HS-81's. HS-50's would only work at lower speeds- there is a lot of elevon area. I tried comparable CS-10's and had slow response when flown outside.

If you are using the speed-280 with Horst G.B. I like to use 9 or 10 280/300mAH NiMH cells. I have used AAA's and bigger cells, The IFO mk3 can handle a lot of weight, you trade vertical for duration.

Jun 15, 2001, 12:07 AM
Registered User
one very important thing is, when you put the nylon tubeing on the trailing edge just before bending the bow around to glue it, do the following.
scotch tape the spacers to the trailing edge.
This way when the bow flys out of your hand, the spacers wont go flying all over the room.
I had to cut new pieces more than once.
Jun 15, 2001, 06:25 AM
Just an average RC'er
Jim McPherson's Avatar
Yep, I'm sure I'm not thinking of the Mini. Every ounce counts on the IFO. Sure it flies better than most airplanes when grossly heavy. But when kept ultra light it flies better than EVERY airplane....well it at least goes vertical and smiles.

Jun 16, 2001, 01:17 AM
Professional Dork
Randy S's Avatar
Be aware that measurements given in the instructions DO NOT match the plans. Use the plans to cut your tubing, not the written instructions.