gross weight ?

[marc]

howdy all,in the book it says 1946 bcs12-d gross weight is 1278lbs but a bc-12d is 1200lbs so what no. should i use im redoing a weight &balance sheet thanks marc n43643

[GLB]

Re: gross weight ?

Hi Marc, if your plane is on wheels you use 1200 lbs. if its on floats then you use 1278lbs.

[Len Petterson]

Re: gross weight ?

Gross weigt ? 1200 Lbs on wheels and 140 mph VNE
1278 Lbs on floats and 129 Mph Vne .
Can one placard the land plane to 129 Mph Vne and use 1278 lbs gross? would be nice with extra punds.
Len.

[Frank DeBartolo]

Re: gross weight ?

I would like to do the same thing. If you find out that you can do it let me know.

Frank

[N96337]

Re: gross weight ?

No, you can't do that...the extra weight is to "compensate" for the float installation, and ONLY in that configuration can you increase the gross. Your aircraft has to conform to the type certificate (down here..don't know aobut one that's in "owner maint, up north), unless legally modified and approved by the administrator (such as STC or field approval).
JH

[marc]

Re: gross weight ?

howdy jh,my tcraft is a bcs12-d factory sea plane i thought i could use 1278 but i not going to put floats on well owell marc n43643

[NY86]

Re: gross weight ?

...the extra weight is to "compensate" for the float installation, and ONLY in that configuration can you increase the gross....

Actually, while the extra weight does in fact compensate for some of the added weight of the floats, the reason the extra weight is allowed is because the floats actually produce some small amount of lift in flight, and reduce the stress in the rest of the airframe.

[astjp2]

Re: gross weight ?

Thats right, the floats fly and produce lift! So no gross weight increase. I can honestly say that I have never flown more than 400# over the gross weight limit.... and they still fly....to get a gross weight increase you will want the longer engine mount to get the CG within the limits....that is one of the things used for the paperwork for the 200# baggage requirements. Tim