Flyingmac's concept has much to recommend it - but my poodles would probably bring me to heel if I tried it on them ... still laughing so hard it hurts ...
empacher48's linked item certainly appears to be better than nothing (and very much better than the traditional belly strap) but has some deficiencies -
(a) the seatback may incorporate a break forward friction fitting for the rear seat passenger headstrike consideration
(b) there is no effective lateral restraint for the child such as you get from the wings on a car seat
(c) I would expect a significant problem with submarining under load. The car seat has a crutch strap to prevent this and is a must do up item for using a car seat.
(d) interference to the loop belt from a mischievous rear seater could make the flight a bit tiresome
I'm located in Rural Victoria
I'll make a few enquiries on your behalf tomorrow and either post or PM
Some light reading to start you off -
(a)
FSA July/August 2006
(b)
CAAP 235-2(1)
(c)
Report on the use of child auto seats in heavy aircraft
(d)
Report on the use of child auto seats in heavy aircraft.
(d) is a followup report to (c). It's a year or so since I last spoke with Mark so I can only presume he is still with CASA - he is a pretty knowledgeable chap on crashworthiness stuff.