Improving electric model flight times?

[bill91]

As I have the last of my FPV gear coming next week I’m keen to get my Caliber dusted of, and if possible improve its run time, its currently doing 6 minutes, and that’s definitely not going full chat ! only about 75% on idel up... If that would even make a difference with electric models?

Anyway, I'm using x2 3000mah 11.1v packs in series atm, I don’t think there are many much larger than that so is it possible to go for another two wired in parallel? then into series so still giving 22.2v.

Sorry if this sounds completely wrong & outrageous. Unfortunately electronics bored the @rse of me at school So I just have to ask someone else

The packs are holstered either side of the frame, or outside of where the fuel tank would be on the nitro version so space & C of G are NOT a problem .

Thanks

[electricsceadu]

i ran 2x 4900 3 cell packs on a 50 sized sceadu giving me 22.2v
with gentle flying i could just get 8 mins
but the performance of the heli was poor
it realy needed to go 8 or 9 cell to liven it up but once the packs went i just fitted an os50 back into it

[bill91]

i ran 2x 4900 3 cell packs on a 50 sized sceadu giving me 22.2v
with gentle flying i could just get 8 mins
but the performance of the heli was poor
it realy needed to go 8 or 9 cell to liven it up but once the packs went i just fitted an os50 back into it

I should have stated that performance is not an issue (FPV) just dosile cruising about...

Would the extra amps be likely to smoke anything???

This heli is standard on 22.2V, from x2 11.1's, just wondering if x4 11.1's would work (each pair into parallel, then into series.)

[electricsceadu]

I should have stated that performance is not an issue (FPV) just dosile cruising about...

Would the extra amps be likely to smoke anything???

This heli is standard on 22.2V, from x2 11.1's, just wondering if x4 11.1's would work (each pair into parallel, then into series.)

the batt's in parallel still using 22.2v would be ok
but what you gain in mAH's you'll lose some flight time due to the extra weight of the batts

[bill91]

the batt's in parallel still using 22.2v would be ok
but what you gain in mAH's you'll lose some flight time due to the extra weight of the batts

Yep thats cool though as long as I dont loose all I gain! I wont expect double, but if I could get a safe 10minutes it would be nice. Thanks

[Rotormotor]

Of course bigger batteries (more mah) is an obvious answer. But setting up for a lower head speed (lower pinion tooth count) will extend the flight timel with the same battery packs..

Using a 4S/5000mah/20C pack on scale Century Swift 16, set to turn at a 1450 rotor speed gives me a 10 minute flight.

[bill91]

Of course bigger batteries (more mah) is an obvious answer. But setting up for a lower head speed (lower pinion tooth count) will extend the flight timel with the same battery packs..

Using a 4S/5000mah/20C pack on scale Century Swift 16, set to turn at a 1450 rotor speed gives me a 10 minute flight.

Thanks but unfortunately I dont think thats an option on the caliber as its belt/pulley driven of the motor.

[Rotormotor]

Thanks but unfortunately I don't think that's an option on the caliber as its belt/pulley driven of the motor.

Ah...maybe you can change the pinion on the motor that drives the belt??

One of the many reasons I picked the Swift, was because of its' great versatility of its' design which allowed it to be used with battery packs of 4S or 5S or 6S. And due to all the pinions and motors available for it, I found it to be so easy to set-up efficiently for any type of flying I wanted to do with it.

[bill91]

Ah...maybe you can change the pinion on the motor that drives the belt??

One of the many reasons I picked the Swift, was because of its' great versatility of its' design which allowed it to be used with battery packs of 4S or 5S or 6S. And due to all the pinions and motors available for it, I found it to be so easy to set-up efficiently for any type of flying I wanted to do with it.

For some reason Kyosho seem to sell the kits with either the Hacker motor & adjustable mount or like mine the 'Brick' headsink housed BL motor which is non adjustable. So fitting a smaller pulley would slacken the belt with no way of tightening it without getting the adjustable mount from Kyosho.

Not sure about the set of gears which are driven of the belt though, they would be the hopefull ones but still doubtfull there are alternatives gear sets available.

Looks like batteries are the only option, 6 minutes on 3000mah though, that cant be to bad surely? Maybe I should get some 5000's, like 4 to get 10000mah .

[Hangar-7]

This link might interest you, if you haven't seen it already :

Kyosho Caliber 700 Review

If you search carefully, you might find there some new Lipos from Hong Kong which have higher mAH but not much weight gained.
Nano technology bx have good amp to power ratio but i have no personal experience with nano cells yet... hope to be there tho soon.

[bill91]

This link might interest you, if you haven't seen it already :

Kyosho Caliber 700 Review

If you search carefully, you might find there some new Lipos from Hong Kong which have higher mAH but not much weight gained.
Nano technology bx have good amp to power ratio but i have no personal experience with nano cells yet... hope to be there tho soon.

Yep thats the same motor as mine, I chucked the built in ESC for an Align I got of here

He's also getting about the same flight time as me (I push it a tiny bit more).

The 3000mah lipos I'm using are 215 Gram each, the 5000mah version I'm looking at are 355Gram, do you think that will be worth it???

[Hangar-7]

Which brand of Lipos are you using? Weight seems very good for both 3000 and 5000 mAH.

Nano technology Lipos link below which might be worth a look :

HobbyKing Online R/C Hobby Store : Turnigy nano-tech 3300mah 3S 45~90C Lipo Pack

[bill91]

Which brand of Lipos are you using? Weight seems very good for both 3000 and 5000 mAH.

Nano technology Lipos link below which might be worth a look :

HobbyKing Online R/C Hobby Store : Turnigy nano-tech 3300mah 3S 45~90C Lipo Pack

Interesting those thanks.

These are cheapy chinese so there probably hollow. Winforce they have been pretty good actually.

Eday search," 11.1v 3000mah ", they are the silver ones, black sticker with yellow print, 99% or the results basicly

[inferno]

If you'd consider nitro, my local model shop had two of these with 30 engines. One is a bare Heli knackered engine, other has servos , spectrum 6 ch, 401, he wanted 200 the pair...