Jan 22, 2021, 11:25 AM Registered User flow through I would think is more important than size because, if the UAT cannot pull fuel from the tanks faster than its using then your UAT will eventually go below the pick up level and you will flame out. Cavitation is similar in this regard, pressure difference and what not.
Jan 22, 2021, 11:26 AM
Registered User
Quote:
 Originally Posted by T-CAT With this X90, would a standard (not the High Flow) 4oz MAP Air Trap be sufficient? I’m just planning the next stage of orders for supplies.
Yes it would
 Jan 22, 2021, 12:49 PM Instagram: @tcat.rc.creations Thanks guys. I appreciate it . I was looking around reading various articles last night to see what additional information I could find and came upon a good one from Ultimate Jets. The article is linked below: https://ultimate-jets.eu/blogs/fuel-...ing-cavitation A quote from part of his article was: “So as good as the older system are, they only offer a few seconds of maximum thrust fuel flow buffer. However, for hard core aerobatics flyers and people who like to fly at full thrust for a large portion of the flight and keep high thrust level in the dive, the amount of air that is sucked by the clunk can be up to 15 seconds of full thrust fuel flow! For this reason I strongly recommend choosing and air trap that offers 30 seconds of full thrust fuel flow buffer capacity.” So, if I’m doing the math correctly with the engine fuel flow specs listed on Xicoy’s website for the X90, X45, and X120, then: 1. X90 fuel flow @max throttle = ~270g per minute 270g = ~9.1oz per min 9.1oz/2 = 4.55oz Air Trap to obtain the 30 second recommendation 2. X45 fuel flow @max throttle = ~145g per minute 145g = ~4.9oz per min 4.9oz/2 = 2.45oz Air Trap to obtain the 30 second recommendation 3. X120 fuel flow @max throttle = ~350g per minute 350g= ~11.8oz per min 11.8oz/2 = 5.9oz Air Trap to obtain the 30 second recommendation I’m comfortable rounding the numbers, and using a 4oz MAP Air Trap for the X90 and 2oz MAP Air Trap for the X45 . That should provide roughly 25 seconds of full thrust fuel flow buffer capacity if I calculated correctly . Last edited by T-CAT; Jan 22, 2021 at 05:19 PM.
 Jan 22, 2021, 06:08 PM Registered User Like I said the above is all about fuel flow and its ability to flow through under various settings, so naturally it would make sense to go with a margin for error at fuel throttle. Cheers
Jan 22, 2021, 06:09 PM
Instagram: @tcat.rc.creations
Quote:
 Originally Posted by fenderbean Like I said the above is all about fuel flow and its ability to flow through under various settings, so naturally it would make sense to go with a margin for error at fuel throttle. Cheers
Makes sense for sure.
 Feb 14, 2021, 09:21 PM Instagram: @tcat.rc.creations Keith, Does the X90 have the exact same pump, manual shut off valve, and filter that the X45 has?
 Feb 14, 2021, 11:20 PM ah dinnae ken The pump is different. It has more flow. Latest blog entry: Gliders_it graecalis
Feb 14, 2021, 11:27 PM
Instagram: @tcat.rc.creations
Quote:
 Originally Posted by jimbo12 The pump is different. It has more flow.
I had a feeling that was the case, but wasn’t sure until confirmed. Thanks Jim .
Feb 15, 2021, 09:22 AM
Registered User
Quote:
 Originally Posted by T-CAT Keith, Does the X90 have the exact same pump, manual shut off valve, and filter that the X45 has?
No its substantially larger than the X45 pump. If I was a betting man the same will be used on the larger Xicoy motors to come as well.
Same for the X90 & X120

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Feb 15, 2021, 10:03 AM
Instagram: @tcat.rc.creations
Quote:
 Originally Posted by fenderbean No its substantially larger than the X45 pump. If I was a betting man the same will be used on the larger Xicoy motors to come as well. Same for the X90 & X120
Excellent, thanks Keith.
 Feb 26, 2021, 03:56 AM Suspended Account Gaspar!! ��������������������
Mar 24, 2021, 06:14 PM
Registered User
 Xicoy X90 whats in the box (11 min 30 sec)
Mar 24, 2021, 06:15 PM
Registered User
 Xicoy X90 ECU walkthtough (15 min 15 sec)

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 Oct 17, 2021, 06:15 AM Registered User Any one already flying the X90? Real time feedback would be nice. Specifically if someone flying these in hot temperatures. Regards Chatty
Oct 19, 2021, 04:09 PM
Peter S.
Quote:
 Originally Posted by c_makhija Any one already flying the X90? Real time feedback would be nice. Specifically if someone flying these in hot temperatures.
Hi Chatty,
until now I had 30 starts with my Viper / X90. Partially over 30° celsius in summer. The Xicoy X90 works perfect. I can absolutely recommend!
Regards Peter

 C&C Model "Viper Jet" powered by Xicoy "X90" (4 min 58 sec)