800mm blades

[Toeh]

I can fly with 4400mah 4min and then I come down 3,80V. It takes something like 60% mah with that. I just don't want to go under the 3,80V. But those batteries are then a way too small for 780mm. Even for 750.

[Michaelinpr]

Yes 4400 will be too small in my opinion. I use 4400 7s as one of my flight packs and can fly 5-5:30min with about 30%. The other percentages I was using as an example were with my 5000 7s packs. I assume most have 5000 6s so I wanted to use that in my example.

If you end up with 3.8 v per cell after 4 min you must be flying harder than me. What is your current pitch and rpm?

[Michaelinpr]

I should add that currently I am running no gov. So i am maybe babying the heli a bit during certain manuevers. Running a gov I think may cut another 30 secs off my flight time.

[Toeh]

+-12.5 2200rpm with EDGE 713mm and EDGE 115mm tail. Flat 85% and with YGE 160HV using Gov.Store. When flying with 75% throttle after 4min it's about 3,85-3,90V to my iCharger. With 75% I think it's something like 1900rpm.

[Toeh]

And it's 12S setup.

[Anthony.L]

Originally Posted by Toeh

Can the 12S handle 780 blades fine? Which kv motor would be good? 11t pinion might be better but I've read that it doesn't work with Rush. Eats main gear quite fast.

I've been happily running Align 780 blades on 12S with a Quantum 4530-450kv. My Idle 2 head speed is 1900 which is the max you safety want to run on those large blades.

Correct, stay with the stock 12t and pick your motor kv to work with it. Don't go down in teeth.

[Toeh]

Ok, thanks. I should look smaller kv motor and bigger batteries then when I'm going to do this stretch.

[itbvolks]

What are the supported blade max lengths of both the stock configuration and stretch option?

Can you swing 750s with the stock boom length without issue?

[jmdanna]

Anything over 715mm needs the extended boom. I run 713mm main blades and they are already getting close to the tail blades on the stock boom. I never did have an issue though.

[itbvolks]

Thanks Jake.

[jmdanna]

No problem!

[burgandyvette]

with stretch on rush 750 you can safely run 780mm with 115 tails.
On stock boom 716mm mains and 115mm tail is max safe.

Im buying a set of 800mm to run and test

[Dennis P]

Yes I had lots of room with my 780s and 115 tailblades. The attached photo is with 766 mains and 116 tails and the stretch boom of course.

[burgandyvette]

I will have the 800mm blades here wednesday or thurs next week. I will report back how it does with 800mm...I loved stretch with 780's. I want to try 800 and see. Soo excited!

[burgandyvette]

Reporting back on rush750 stretch kit(boom extenstion)
800mm blades fit no problem with 115mm tail blades.
Heli looks great, flies even better. 780mm blades were great lots of lift but the 800mm blades rip like no tomorrow at 1800 head speed. Move massive amounts of air.