Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Whiplash Engines

Reply

Old 05-26-2002, 10:47 AM
  #1  
Forgues Research
Senior Member
Thread Starter
My Feedback: (7)
 
Forgues Research's Avatar
 
Join Date: Dec 2001
Location: Glen Robertson, ON, CANADA
Posts: 3,453
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

I would love to hear from you guys what engines are you planning to use on your Whiplash.
The size, the type, pipe or no pipe etc..
I'm just taking a survey....
Forgues Research is offline  
Reply With Quote
Old 05-26-2002, 11:43 AM
  #2  
a4tune8one-RCU
Junior Member
 
Join Date: Feb 2002
Location:
Posts: 16
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

I plan on using a Jett SS 50. I think the Jet Fire 50 would be an excellent choice and possible engine in the future.
Elevons will be equipped with JR 2721's. These were purchased before I read the threads on how quickly slop occurs. If this becomes a problem I will switch to the nylon geared version.
After corresponding with Rick, I will be curious as to where the standard upright mounting of my engine will put the stock supplied exhaust pipe. Rick said the wing is impervious to most abuse but recommends 1 to 2 inch clearance in this area.
a4tune8one-RCU is offline  
Reply With Quote
Old 05-26-2002, 01:14 PM
  #3  
RC_Junky
Senior Member
My Feedback: (1)
 
Join Date: Dec 2001
Location: South West, FL
Posts: 230
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

I plan on using an MVVS .40 with rear exhaust and a mini tuned pipe turning an APC 9 x 8 prop. My elevon servos will be Hitec 605 BB's mainly because I already have them NIB. Will post how they hold up.
RC_Junky is offline  
Reply With Quote
Old 05-26-2002, 03:37 PM
  #4  
Forgues Research
Senior Member
Thread Starter
My Feedback: (7)
 
Forgues Research's Avatar
 
Join Date: Dec 2001
Location: Glen Robertson, ON, CANADA
Posts: 3,453
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

Originally posted by RC_Junky
I plan on using an MVVS .40 with rear exhaust and a mini tuned pipe turning an APC 9 x 8 prop. My elevon servos will be Hitec 605 BB's mainly because I already have them NIB. Will post how they hold up.
A word of caution on these servos for such a high speed aircraft. You need to have an extremely good centering servo, and the 605's might not be your best choice in this case.
Forgues Research is offline  
Reply With Quote
Old 05-26-2002, 03:47 PM
  #5  
RC_Junky
Senior Member
My Feedback: (1)
 
Join Date: Dec 2001
Location: South West, FL
Posts: 230
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

Originally posted by aerografixs


A word of caution on these servos for such a high speed aircraft. You need to have an extremely good centering servo, and the 605's might not be your best choice in this case.


Thanks for the input, if I have to buy a pair for this project then I may as well get good ones (that's reasonably priced). What would you suggest that's Futuba compatible?
RC_Junky is offline  
Reply With Quote
Old 05-26-2002, 03:56 PM
  #6  
Forgues Research
Senior Member
Thread Starter
My Feedback: (7)
 
Forgues Research's Avatar
 
Join Date: Dec 2001
Location: Glen Robertson, ON, CANADA
Posts: 3,453
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default servos

I think a good digital servo is the way to go, and of course, being a Multiplex dealer, I have to say the Multiplex Royal is by far your best bet. You can reverse it, lots of power, and not too expensive. Multiplex are known to have the best centering.

Don't forget everything has a price.
Forgues Research is offline  
Reply With Quote
Old 05-26-2002, 03:57 PM
  #7  
Forgues Research
Senior Member
Thread Starter
My Feedback: (7)
 
Forgues Research's Avatar
 
Join Date: Dec 2001
Location: Glen Robertson, ON, CANADA
Posts: 3,453
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Re: servos

Originally posted by aerografixs
I think a good digital servo is the way to go, and of course, being a Multiplex dealer, I have to say the Multiplex Royal is by far your best bet. You can reverse it, lots of power, and not too expensive. Multiplex are known to have the best centering.

Don't forget everything has a price.
I have to add, that I wasn't implying that Multiplex where the only digital servos, there are others.
Forgues Research is offline  
Reply With Quote
Old 05-26-2002, 04:00 PM
  #8  
Forgues Research
Senior Member
Thread Starter
My Feedback: (7)
 
Forgues Research's Avatar
 
Join Date: Dec 2001
Location: Glen Robertson, ON, CANADA
Posts: 3,453
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

Speaking of servos, I would highly recommend also to keep the weight down, to use NmHd batteries with 4 cells only. You can have a 800ma at a very reasonable weight and with the minimum servos needed, you will have plenty of battery power.
Forgues Research is offline  
Reply With Quote
Old 05-26-2002, 04:04 PM
  #9  
RC_Junky
Senior Member
My Feedback: (1)
 
Join Date: Dec 2001
Location: South West, FL
Posts: 230
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

Never heard of them. Got some part #'s and or a website where I can get a look?
RC_Junky is offline  
Reply With Quote
Old 05-26-2002, 05:39 PM
  #10  
Forgues Research
Senior Member
Thread Starter
My Feedback: (7)
 
Forgues Research's Avatar
 
Join Date: Dec 2001
Location: Glen Robertson, ON, CANADA
Posts: 3,453
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Nickel Metal Hydride

Take a look here. These are AA

[url]http://rcaccessory.goemerchant7.com/index.cgi?PageToView=bigpicture&DepartmentID=31472&DepartmentName=Batteries&Cartid=20721022438382&Merchant=rcaccessory&ItemID=725435&ItemName=4
Forgues Research is offline  
Reply With Quote
Old 05-26-2002, 05:42 PM
  #11  
Forgues Research
Senior Member
Thread Starter
My Feedback: (7)
 
Forgues Research's Avatar
 
Join Date: Dec 2001
Location: Glen Robertson, ON, CANADA
Posts: 3,453
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

Originally posted by RC_Junky
Never heard of them. Got some part #'s and or a website where I can get a look?

http://rcaccessory.goemerchant7.com/...435&ItemName=4
Forgues Research is offline  
Reply With Quote
Old 05-26-2002, 05:45 PM
  #12  
RC_Junky
Senior Member
My Feedback: (1)
 
Join Date: Dec 2001
Location: South West, FL
Posts: 230
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

Originally posted by RC_Junky
Never heard of them. Got some part #'s and or a website where I can get a look?
Thanks, but I ment the Multiplex Servos.
RC_Junky is offline  
Reply With Quote
Old 05-26-2002, 06:00 PM
  #13  
Forgues Research
Senior Member
Thread Starter
My Feedback: (7)
 
Forgues Research's Avatar
 
Join Date: Dec 2001
Location: Glen Robertson, ON, CANADA
Posts: 3,453
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

Originally posted by RC_Junky


Thanks, but I ment the Multiplex Servos.
Check your E-mail
Forgues Research is offline  
Reply With Quote
Old 05-26-2002, 09:00 PM
  #14  
JSF-TC
My Feedback: (2)
 
JSF-TC's Avatar
 
Join Date: May 2002
Location: Fort Worth, TX
Posts: 910
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engine

I'm planning on putting a Rossi 53 with a Rossi full length tuned pipe on it.

I think an 11x8 or a 10x9 prop should do to start with.

The Rossi book says that max power (2.2hp) is achieved at around 16k rpm so the question is;

Should I tune it and prop it for 16-17k on the ground and let it unload in the air, or prop it down to around 14-15k so that it unwinds to the max power rpm in the air???

Any thoughts are appreciated.

Thanks
JSF-TC is offline  
Reply With Quote
Old 05-26-2002, 09:22 PM
  #15  
RC_Junky
Senior Member
My Feedback: (1)
 
Join Date: Dec 2001
Location: South West, FL
Posts: 230
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

JSFTC, sounds like you're going to have a super fast bird. What are you planning for servos?
RC_Junky is offline  
Reply With Quote
Old 05-26-2002, 09:23 PM
  #16  
Forgues Research
Senior Member
Thread Starter
My Feedback: (7)
 
Forgues Research's Avatar
 
Join Date: Dec 2001
Location: Glen Robertson, ON, CANADA
Posts: 3,453
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default tune pipe

Just a thought, but since the Whiplash will gain an extreme amount of speed as it unloads, I beleive you should tune it to 14K on the ground being a bit on the rich side as it will lean considerably as it unloads.
Also, if your looking for max speed, shouldn't you be looking for a smaller dia. prop with a bit more pich, again, just a thought.

Please do keep us informed, sounds like an interesting combo...
Forgues Research is offline  
Reply With Quote
Old 05-26-2002, 09:44 PM
  #17  
JSF-TC
My Feedback: (2)
 
JSF-TC's Avatar
 
Join Date: May 2002
Location: Fort Worth, TX
Posts: 910
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash and Rossi 53

I'm going to use a couple of JR 8411 digitals on the elevons - plenty of torque.

I was wondering about the benefit of increasing pitch and reducing diameter but I'm not sure of the exchange rate between the two. I still think I ought to aim for about 16k rpm in the air (max power according to Rossi) so I might tune the pipe to 16k and then over prop it to get around 14k on the ground. Does that make sense???
Does anybody know where you can get over-square props (i.e. pitch larger than diameter)?

Thanks
JSF-TC is offline  
Reply With Quote
Old 05-26-2002, 11:19 PM
  #18  
jlong34016
Senior Member
My Feedback: (1)
 
Join Date: Apr 2002
Location: columbus, OR,
Posts: 365
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

I have a jett fire 60 with ducted fan pipe. I plan on 10x10 prop. Digital servos, in flight mixture control.
jlong34016 is offline  
Reply With Quote
Old 05-26-2002, 11:23 PM
  #19  
Forgues Research
Senior Member
Thread Starter
My Feedback: (7)
 
Forgues Research's Avatar
 
Join Date: Dec 2001
Location: Glen Robertson, ON, CANADA
Posts: 3,453
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default One fast airplane

That will be one fast airplane, just be carefull not to make it too heavy though, please let us know how fast it will go. When will have its mayden flight?
Forgues Research is offline  
Reply With Quote
Old 05-26-2002, 11:39 PM
  #20  
jlong34016
Senior Member
My Feedback: (1)
 
Join Date: Apr 2002
Location: columbus, OR,
Posts: 365
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

The day after i get it in the mail.
jlong34016 is offline  
Reply With Quote
Old 05-26-2002, 11:42 PM
  #21  
Forgues Research
Senior Member
Thread Starter
My Feedback: (7)
 
Forgues Research's Avatar
 
Join Date: Dec 2001
Location: Glen Robertson, ON, CANADA
Posts: 3,453
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

Be patient, you won't regret it, I'm looking forward to seeing the pictures
Forgues Research is offline  
Reply With Quote
Old 05-26-2002, 11:47 PM
  #22  
RC_Junky
Senior Member
My Feedback: (1)
 
Join Date: Dec 2001
Location: South West, FL
Posts: 230
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

Thanks, could be the first flight report posted to my knowledge.
RC_Junky is offline  
Reply With Quote
Old 05-27-2002, 12:32 AM
  #23  
pdxpaul
Senior Member
My Feedback: (1)
 
Join Date: Mar 2002
Location: Portland, OR
Posts: 135
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Re: Whiplash Engine

Originally posted by JSFTC
I'm planning on putting a Rossi 53 with a Rossi full length tuned pipe on it.

I think an 11x8 or a 10x9 prop should do to start with.

****
Any thoughts are appreciated.

Thanks

JSFTC,

I don't have a Rossi 53, but I do have a Rossi 45 that I run on a pipe. I usually run an APC 9x8. For your 53, I would think an APC 9x9 or 9x10 would be about right if you want to go fast.

Paul
pdxpaul is offline  
Reply With Quote
Old 05-27-2002, 01:08 AM
  #24  
ZERODOWN
My Feedback: (4)
 
Join Date: Mar 2002
Location: Macon, GA,
Posts: 196
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Whiplash Engines

PLAN ON USING A NEW OS 46 DUCTED FAN, PIPE, AND INFLIGHT MIXTURE CONTROL WITH DIGITAL SERVOS
ZERODOWN is offline  
Reply With Quote
Old 05-27-2002, 11:00 AM
  #25  
Forgues Research
Senior Member
Thread Starter
My Feedback: (7)
 
Forgues Research's Avatar
 
Join Date: Dec 2001
Location: Glen Robertson, ON, CANADA
Posts: 3,453
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Keep then comming

I really appreciate you guys sharing your engine info with us. It will give a chance to the guys that don't know what they should use as powerplant.

Anyone going to use more regular engines like an OS FX 46. Or even a 32 . Not everyone is going to go all out with speed, so it would be nice to know that someone who's inclination is not to spend all the big dollars can still have loads of fun with a less expensive setup.
Forgues Research is offline  
Reply With Quote

Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service