Hi all
I've posted here a few times already in reagards to the powered glider
(OK Models Caloway) that I'm still building.
My final, and largest, obstacle in the whole assembly process has now
become how to cram everything into the fuselage. I realize this is a
common issue with R/C planes (I built a glider once before), and I've
done quite a bit of mechanical/electronics work in the past requiring
extremely cramped enclosures. However, I cannot see any possible way
I'm going to be able to cram everything into this fuselage and still
have the battery be removable in any practical sense.
If everything were going to be more or less fixed in there I'd have no
problem, but I've got to squash cables, bend and twist stuff. I am
certain that after a few times removing the battery for charging
something is going to get damaged.
Incidentally, the items inside are: Motor, speed controller, receiver
and nicad battery pack (and one servo towards the back). Due to the
fuselage design, the battery pack must be located on the bottom of the
fuselage with the other components above it.
I see only two possible options at this point:
1. Keep the battery fixed inside the plane and charge it in place. I
realize this means I cannot swap out battery packs and also presents a
potential hazard by charging it inside the plane (though, is this as
bad for ni-cads as the lithium batteries I've heard of?)
2. Cut an opening on the bottom of the fuselage and use it to
install/remove the battery. (Note, the way the fuselage is
constructed, there is no way to have the battery be on the top near
the removable canopy - the battery must be on the bottom.) If I cut
this hole on the bottom, I would reinforce it and make a removable
plate.
Any ideas/suggestions?
Regards,
Monkeyboy
Martin X. Moleski, SJ - 25 Jun 2004 05:14 GMT
> ... is this as
>bad for ni-cads as the lithium batteries I've heard of?
I think not.
>2. Cut an opening on the bottom of the fuselage and use it to
>install/remove the battery.
Sounds to me like the way to go.
But make darned sure that you've got a
good system to keep the batteries in the plane.
I saw a .61-powered plane go in because the
batteries fell out of the battery hatch in flight.
It was ugly. :o(
Marty
Red Scholefield - 25 Jun 2004 10:46 GMT
Would getting a cell pack made up in a stick configuration help any?
--
Red S.
Red's R/C Battery Clinic
http://www.rcbatteryclinic.com
Check us out for "revolting" information.
> Hi all
> However, I cannot see any possible way
[quoted text clipped - 5 lines]
>
> Monkeyboy
John R. Agnew - 27 Jun 2004 18:32 GMT
> Hi all
>
[quoted text clipped - 38 lines]
>
> Monkeyboy
Suggestions: shorten all wires to the least required,then solder.
Remove the case from the receiver. Plug connectors together rather
than use a switch. That buys a little space, maybe not enough for your
particular application.
jeboba - 27 Jun 2004 21:42 GMT
Bet a speed controller that includes a BEC (battery elimination circuit).
That will allow you to leave out the receiver battery!!!
> > Hi all
> >
[quoted text clipped - 43 lines]
> than use a switch. That buys a little space, maybe not enough for your
> particular application.
MonkeyBoy - 29 Jun 2004 05:15 GMT
Thanks for the advice.
Incidentally, my motor speed controller does the the battery
elmination circutitry, so everything runs off just my one batter pack
(which is the "stick" type).
I've decided to try to create an access hatch on the bottom of the
fuselage. After all, I know I'll be wanting to bring a few charged
battery packs to the field. If that doesn't work out okay, I'm just
going to semi-permanently mount the pack in the fuselage.
-MB
Bushy - 29 Jun 2004 14:53 GMT
> Incidentally, my motor speed controller does the the battery
> elmination circutitry, so everything runs off just my one batter pack
[quoted text clipped - 4 lines]
> battery packs to the field. If that doesn't work out okay, I'm just
> going to semi-permanently mount the pack in the fuselage.
Or, put a back cargo door on it like a C130 Hercules or hinge the nose or
tail and get it out that way.
Hope this helps,
Peter