I believe it is the Thunderclap, yes. If memory serves, the nomenclature was changed before the game was released and the novel has the old name.
From: [Cade Calrayn] <firstname.lastname@example.org>
To: "email@example.com" <firstname.lastname@example.org>
Sent: Tuesday, January 8, 2013 10:08 PM
Subject: SWTOR: Decieved question
Hello Mr. Kemp,
I am a member of Wookieepedia, and we recently came across an issue regarding your novel Deceived that I thought you might be able to answer. It's about a ship called the BT7 Thunderstrike, which appeared in the epilogue as a tri-winged fighter. Someone recently asked if the ship was actually the BT-7 Thunderclap, the tri-winged fighter that is used as the ship for the Trooper class in The Old Republic. As Deceived is a tie-in novel for the game, would you happen to know if that was the ship you were referring to?