JR Forza 700 "The BIG build thread"!

[mkovalcson]

So what is the final weight ready to fly ?

[Dany Boy]

5kg040 for mine with Hacker 5000 20C.

[mahbouni]

Mine weighs 3.78Kg without batteries. That includes 713mm mains, Pyro 750-56 Competition, Kosmik 200, Vbar Silverline, Futaba BLS servos and an Opt UltraGuard. For batteries I'm using a pair of 7s 4500 packs that weigh about 800g each.

[mkovalcson]

Originally Posted by mahbouni

Mine weighs 3.78Kg without batteries. That includes 713mm mains, Pyro 750-56 Competition, Kosmik 200, Vbar Silverline, Futaba BLS servos and an Opt UltraGuard. For batteries I'm using a pair of 7s 4500 packs that weigh about 800g each.

How does it feel in the air?

[mahbouni]

It doesn't feel heavy in the air with 713 blades and it moves pretty quick with the power system I have. Definitely a keeper.

[totoro_bus_cat]

Hi Mahbouni,

Doesn't that put your headspeed at about 2500+ at 80% with 14s .
It would still be high with 12s.

[mahbouni]

Originally Posted by totoro_bus_cat

Hi Mahbouni,

Doesn't that put your headspeed at about 2500+ at 80% with 14s .
It would still be high with 12s.

A friend of mine tached it with a WR Chinook @ 2150rpm. I can't rememember what throttle % that was with but definitely between 70-80%.

What I do know as fact is this. When I had this exact same power system in my Synergy E7, at 74% throttle I got 2310rpm according to the Kosmik logs. Here are some constants.

Synergy E7
-----------------
Main Gear = 116T
Pinion = 14T
# of Cells =12s

Forza 700
--------------
Main Gear = 112T
Pinion = 11T
# of Cells = 14s

So here is a calculation...

New RPM = (2310rpm x 116T x 11T x 14s) / (112T x 14T x 12s) = 2193rpm

It's not far off

[abanihani]

I believe that. I am using pyro 750 hand wound for 530KV, Kosmik and 12 tooth pinion. I am getting according to Jlog 1920 rpm at 80% throttle. I think i will need a pyro 560 kv to get in the 2000 rpm range, that or 13/14 tooth pinions which are not available anyway. I am using 12S

[ve3ygl]

I found it in my JR Forza 700 kit. What is it please?

[TheKingPhisher]

That's used to hold/position the antenna but you could use it for other things too.

[dbirds2]

ive been using my forza with the cyclone 696 blades and i pretty happy with it but it feels very heavy with these blades kinda like a rock that wants to drop fairly quickly. I was wondering if anyone has had the chance to fly longer recommended 710mm blades versus shorter blades. Im hoping to get a little more floaty feelling inn the air. thanx

[dbirds2]

i was wondering same thing. I know it has to do with servo wires but how it works has me puzzled.

[TheKingPhisher]

They do the same job as these but since they're metal you can curl them around the wire, antenna tube etc.

[mahbouni]

Originally Posted by dbirds2

ive been using my forza with the cyclone 696 blades and i pretty happy with it but it feels very heavy with these blades kinda like a rock that wants to drop fairly quickly. I was wondering if anyone has had the chance to fly longer recommended 710mm blades versus shorter blades. Im hoping to get a little more floaty feelling inn the air. thanx

Yes I'm using Edge SE 713 and my friend is using Rail 716. It feels right with these blades.

[Hum4nfrog]

Hi guys. For what it is worth, here is my Forza 700 build thread: http://www.rcmania.cz/viewtopic.php?f=108&t=65865 Strange language, I admit, but the pictures are universal :-)

[TheKingPhisher]

Originally Posted by Hum4nfrog

Hi guys. For what it is worth, here is my Forza 700 build thread: http://www.rcmania.cz/viewtopic.php?f=108&t=65865 Strange language, I admit, but the pictures are universal :-)

That is the best photo build of a Forza 700 to date. It actually looks like what an official JR build would look like.