MLG ON DEP ENCOUNTERS BUILDUPS AND SHALLOWS TURN TO AVOID.

Narrative

WE WERE DEPARTING RWY 14L AT IAH. THE TWR ASSIGNED US A L TURN TO HDG 020 DEGS. AFTER CLBING OUT OF 1500 FT. I WAS FLYING THE ACFT AND FOLLOWING THE FLT DIRECTOR. DURING THE TURN TO 020 DEGS AFTER CLBING OUT OF 1500 FT; WE NOTICED SOME BUILDUPS ALONG OUR FLT PATH AND DECIDED TO REDUCE THE BANK ANGLE FOR A FEW SECONDS TO FLY OUTSIDE THE BUILDUPS. WE TOLD THE TWR WE NEEDED TO DO THIS AND HE ASKED US TO TIGHTEN OUR TURN AS SOON AS WE WERE PAST THE BUILDUPS AND HE GAVE US A NEW HDG. AS WE PASSED THE BUILDUPS WE INCREASED OUR BANK ANGLE AND AT THE SAME TIME TWR GAVE US A NEW HDG OF 310 DEGS AND TO MAKE A TIGHT TURN DUE TO TFC. WE DID AS HE INSTRUCTED AND LEVELED AT 4000 FT ON A HDG OF 310 DEGS. SHORTLY AFTER THIS THE TWR HANDED US OFF TO THE NEXT CTLR AND ASKED US TO GIVE HIM A CALL UPON OUR ARR. THE CAPT CALLED THE CTLR UPON OUR ARR. IN THAT DISCUSSION THE CTLR EXPLAINED THE BIG PICTURE OF THE SIT AND SAID THAT WHAT THEY NEED WITH THAT RWY CONFIGN (DEPARTING RWY 14L AND ARRIVING RWY 26 AND RWY 27) WAS A TIGHT TURN WHICH KEPT US WITHIN 3 MI OF THE ARPT. HE SAID THEY WERE USED TO 757'S PLUS 747'S WHICH COULD DO THIS WITHOUT A PROB. HAD WE KNOWN THAT THEY NEEDED THIS TIGHT TURN WE CERTAINLY COULD HAVE DONE THIS; BUT WE DID NOT KNOW AND WERE MORE CONCERNED WITH THE SMOOTH RIDE FOR THE PAX AND GETTING AROUND THE BUILDUPS. THE CTLR DID NOT ISSUE US A TIGHT TURN INITIALLY AND THERE WAS NO REQUIREMENT TO MAKE A TIGHT TURN ON THE INTERCONTINENTAL 9 DEP. I THINK THE COMBINATION OF THE PERFORMANCE OF THE FK-100 ON A HOT DAY AND THE DECREASED BANK ANGLE FOR BUILDUPS IN OUR TURN CAUSED SOME TFC PROBS FOR THE ARR CTLR. THE FK-100 IS A NEW ACFT IN IAH AND DOES NOT PERFORM THAT WELL ON HOT DAY CLBOUTS. PERHAPS OUR COMPANY HAVING A WRITTEN EXPLANATION IN OUR FLT MANUAL PART II TO KEEP THE TURNS OFF RWY 14L TIGHT OR WITHIN 3 MI WOULD HELP PREVENT FUTURE PROBS. OR A WRITTEN STATEMENT ON A DEP OR SPECIFIC INSTRUCTIONS FROM THE TWR.