Yes, I have the excel format that we got in a round-a-bout way from sikorsky, we don't use it however I don't know if it's legal. We use the IIDS calculation, we then cross check it with the spreadsheet for fun. The spreadsheet always does much better than the IIDS. I wish we could use the spreadsheet, it would have saved us several engine changes for low power. This is only for 2S1 engines. I can email it to you if you supply your email.