How Fast is a DA42?

Posted on May 22, 2013
There are three flavors of diesel  DA42 available in North America:
  1. DA42TDi with 135 HP Centurion engines
  2. DA42NG with 168 HP Austro AE300 engines
  3. DA42N-VI with Austro engines and a suite of aerodynamic cleanups

As with just about everything in aviation, there are tradeoffs between cost and performance, and what follows is drawn from the aircraft flight manuals for each aircraft.

Diamond is very good about publishing their AFM and maintenance/parts manuals online.  Here are links to the entire DA42 AFM

 NG VI and TDi Cruise Speeds.xls
Just the cruise performance tables are here:
DA42NG Cruise Performance
DA42NG-VI Cruise Performance
These are conservative numbers which you should expect to meet at max gross weight.  At altitudes below 12,000:
  • DA42NG-VI is 3 – 5 KTAS faster than DA42NG
  • DA42NG is 10 – 15 KTAS faster than the DA42 TDi
 AT 16,000 and above, the gap widens:
  • DA42NG-VI is 15 KTAS faster than DA42NG
  • DA42NG is 15 – 18 KTAS faster than DA42 TDi
 

Altitude VI 92% 8.1 GPH NG-92% 8.1GPH Tdi 90%  7.2GPH
2000 165 165 151
4000 168 167 154
6000 172 168 157
8000 175 171 160
10000 179 173 163
12000 182 174 162
14000 189 175 163
16000 191 174 156
18000 188 173 157
 
 
Great Lakes Diamond has sold more DA42NG aircraft than any other Diamond distributor. Our local Diamond Service Center, A&M Aircraft Services, maintains more than a dozen of the DA42 models.  We are the DA42 experts!  Let us help you choose the right plane for your mission.
 

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