Roban B407 AeroMed 700 Size Scale Build

[PawPaw]

Man, it doesn’t get any better than that! Glad I didn’t glue my top spacer in..just figured something would change. I did see a video where the guy was having problems setting up his IKON’s auto level feature partly due to the calibration of the gyro’s static angle. Heli would drift backwards when he enabled the feature.

[lt1pwr]

Here’s how mine sits in the fuse with 1 plate being used.

[PawPaw]

Yeah, I agree it does appear too much but the tail tube was a perfect fit all around so left mine with 2 shims. I’ll pull one out & recheck. Thanks!

[lt1pwr]

I installed 1 under the rear. For me, 2 at the rear added too much forward tilt to the mechanics and didn’t look right.

[PawPaw]

Thanks, lt1pwr....just received the 130mm Vario tail blades so will definitely start at the 1300. I’m finishing some plumbing items that require the mechanics installed then will get the test bed set up. I’m curious...did you use both of the plastic spacing plates under the rear frame mounts to get the main shaft forward tilt Roban calls out? I have both installed & the tilt looks correct per Roban’s illustration but that sure is a lot of angle! I did a quick blades-off CG check by simply hand lifting at the rotor head & appears the slight tail low attitude is more from the main shaft angle than offset weight.

[lt1pwr]

That’s interesting. I set 1300 for mine

I hooked up my laptop to mine this morning and I am running 1275 rpm’s. It doesn’t fly well with a lower head speed. 1300 rpm’s would be a good starting point to see how yours flies. If you are going to test fly your mechanics outside the fuselage, make sure to add enough weight to simulate the weight of the fuselage. That will help dial everything in prevent any further adjustments when the mechanics are installed in the fuselage.

[PawPaw]

Thanks, Alpha! It’s inductance I believe. I had 2 LED controllers & 2 electronic receiver switches bundled adjacent to the ESC with intention to properly zip tie the wiring later. Once I separated everything away from the ESC the lights worked normally. Time to recheck insulation....
Yes sir, Roban hit the mark with these B407s. I’m a big fan of the Dremel, don’t get me wrong, but nice to see that not even a single control arm or pushrod slot was required on this bird. Even the doghouse flanges cleared the main gear with room to spare.

[Alpha]

PawPaw I really enjoy watching your progress, your final machine is shaping up to be very impressive. Nice to see your confirmation that the Roban fuselage didn't require any dremeling to fit your mechanics.

I'm curious, what was the cause of your initial lighting issue that you then solved? Interference, or loose wiring, or?

[PawPaw]

[PawPaw]

Thanks, F106. Got the lights working right & just stuffed all the wiring mess in the back temporarily. Did a quick blades off spool up & lights went crazy. Pulled the mess outside, did another spool up & lights work fine. That’ll teach me to hurry.

[F106DeltaDart]

Great work so far, love the interior! I picked up the 800 Aeromed Bell 222 a few months back and will be looking to do something similar.

[PawPaw]

I ordered a pair of 130mm blades from Peak Aircraft yesterday. Mechanically, AeroMed is ready to test (with stock blades) but lots of detailing to finish. I can now accurately report that these Roban B407s can be entirely assembled without the need to Dremel any fiberglass at all. Amazing..

[PawPaw]

I may end up with the Varios but will absolutely be last resort mostly due to overseas. Sure doesn’t appear Motion is having much luck with parts restocking but that’s not surprising considering current events.

[DCORSAIR]

Don't know if you want to pay Vario prices but they have a selection of different size tail blades.

[PawPaw]

Same here, DCORSAIR...found some overseas in the 115-116mm range but never did locate 120’s. Certainly do appreciate you looking.

[DCORSAIR]

I will be looking for you some 120mm blades, I found some that I thought would work for you but they were not here in the US.

[PawPaw]

That’s interesting. I set 1300 for mine with the 500kv Scorpion but that might change after I get thru the testing phase. I’ve never flown a 4 blade system and certainly nothing this big so I’ll definitely experiment with shorter blades later. So far not having much luck finding 120mm blades (or longer to cut down) so gotta wait anyway.

[lt1pwr]

It's been about 2 years since I had my laptop hooked up to the ESC but I 'm pretty sure I'm running 1350 rpm head speed. I'm using 690mm Align blades versus the Roban blades that came with it.

[PawPaw]

Thanks for looking, lt1pwr. Sounds like the 120’s ended up being the sweet spot so I’ll start looking. What headspeed are you running, btw?

[lt1pwr]

I found my box of tail blades and unfortunately the extra set I have are 110mm versus 120mm. Sorry about that.