Whiplash Engines
05-26-2002, 10:47 AM
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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....
The size, the type, pipe or no pipe etc..
I'm just taking a survey....
05-26-2002, 11:43 AM
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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.
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.
05-26-2002, 01:14 PM
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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.
05-26-2002, 03:37 PM
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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.
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.
05-26-2002, 03:47 PM
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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.
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?
05-26-2002, 03:56 PM
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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.
Don't forget everything has a price.
05-26-2002, 03:57 PM
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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 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.
05-26-2002, 04:00 PM
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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.
05-26-2002, 05:39 PM
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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
[url]http://rcaccessory.goemerchant7.com/index.cgi?PageToView=bigpicture&DepartmentID=31472&DepartmentName=Batteries&Cartid=20721022438382&Merchant=rcaccessory&ItemID=725435&ItemName=4
05-26-2002, 05:42 PM
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Originally posted by RC_Junky
Never heard of them. Got some part #'s and or a website where I can get a look?
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
05-26-2002, 05:45 PM
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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?
Never heard of them. Got some part #'s and or a website where I can get a look?
05-26-2002, 09:00 PM
#14
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
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
05-26-2002, 09:23 PM
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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...
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...
05-26-2002, 09:44 PM
#17
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
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
05-26-2002, 11:23 PM
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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?
05-27-2002, 12:32 AM
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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
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
05-27-2002, 11:00 AM
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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.
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.
