RCU Forums - View Single Post - Hobbico Electristar Components in New Plane
Old 09-30-2008 | 06:15 PM
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opjose
 
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From: Poolesville, MD
Default RE: Hobbico Electristar Components in New Plane

The Electristar comes with a 45A ESC and uses a pair of 7.4v batteries.

Assuming that the ESC has a build in safety margin, and that the Estar runs at around 40A full throttle ( which is what we measured one day )....

That works out to about 600 watts or .8 HP. 1 HP = 745 watts.

The Pulse XT usually runs with a .46 engine that delivers about 1.7bHP... assuming that this is optimistic, and the engine produces less, say 1.4bHP, the Estar's electric system still only produces about 56% of the power of the engine that is normally used.

Likewise for a .40-.46 trainer...

However trainers fly SLOW and don't require a lot of power which is why the Estar originally came with this combo... note that everyone also recommended upgrading to LiPo so as not to make the Estar so sluggish in flight...


Will the Pulse XT fly with the Estar's engine? Probably but NOT well but it will fly.


The Pulse is a WONDERFUL second plane. I've flown the .46 XT and the Mini Pulse extensively.

They float in very slowly but you'll never tire of this plane.

However they do not tolerate rough landings, so I hope you are at the point that hard landings are very infrequent.
Re-inforce the gear area, and bring it in with a bit of throttle and you'll do fine.

Remember that tail draggers tend to yaw at takeoff.... and you should check the plane's tracking before flying it.

Go for the Pulse .25e.



If I were doing this however, I'd opt for the new Pulse XT .25E.

That would be a PERFECT match for the Motor & ESC combo, but you would have to use 14.8v ~3800mAh LiPo 20C/30C packs.

This would give the Pulse XT .25E more than ample power.

The Pulse .25e is also set up with a hatch and nominally accepts the 3800mAh packs.



Re: .32 plane

The point was that the EP combo is about the equivalent of a .32 to .25 glow engine. So it is perfectly suited to a .25 to .32 plane.

The NiCD batteries may be too big and heavy for most .25 to .32 planes though, excepting big winged trainers...

If you buy LiPo's instead however everything changes. ( Hint: Rhino's from "Hobby city . com" are VERY well priced... remove the spaces ).