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wild hare, LR-1 pylon racer - 10/6/2005 3:13:03 PM   
fly-guy-ty


 

Posts: 56
Joined: 2/23/2005
From: Cotuit, MA, USA
Status: offline 		anybody have one of these? looks like fun with a Jett 25 or 30!! would love to try one of these, need to catch up with the other unfinished planes on my bench though, and sell a few! check this plane out at www.wildharerc.com/Products/Racer/racer.htm

< Message edited by fly-guy-ty -- 10/7/2005 5:40:31 PM >

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RE: wild hare, LR-1 pylon racer - 10/7/2005 5:25:28 PM   
rmenke


 

Posts: 1773
Joined: 6/25/2004
From: Merced, Ca., CA, USA
Status: offline
Am jumping in here just to get on the thread. Have a much loved Jett 35 that thinks its a 45. Have heard good things about the LR-1, but am in the sticks and never have seen one fly, or flown one. Need a backup to my home brew "Yellow Jacket" that will survive my landings. Other than the Q-500, have yet to get my landings down as good as I wish.

(in reply to fly-guy-ty)
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RE: wild hare, LR-1 pylon racer - 10/7/2005 10:19:41 PM   
Crazy4Flight



Posts: 2241
Joined: 9/15/2002
From: Milford, MI, USA
Status: offline 		I have one, red-yellow, bought last april @ Toledo. Still have not put it together. I have a .25FX but need to order a Jett.35 tobuild it right!

bob # 105

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RE: wild hare, LR-1 pylon racer - 10/8/2005 7:23:50 AM   
Airbike


 

Posts: 600
Joined: 3/18/2003
From: Walnut, CA, USA
Status: offline 		Here's my old thread in the Wildhare RC support forum:

http://www.rcuniverse.com/forum/m_2970522/mpage_1/key_LR%2D1%2Cpylon%2Cracer/tm.htm

On my last flight with my glow powered LR-1, the engine threw a prop blade at around 18000 rpm. Got the plane down ok. Now that the firewall is off, I plan on making another firewall from 1/4" ply. But I can put the firewall where-ever it needs to be for ???engine.

I have a couple of Supertiger X.40 formula 1 engines that someone gave me, but I'd have to cut away the right cowl cheek to fit the rear exhaust pipe.

I think the Jett BSE 35 would be ideal for this airframe in terms of power and light weight.

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RE: wild hare, LR-1 pylon racer - 10/8/2005 3:36:58 PM   
fly-guy-ty


 

Posts: 56
Joined: 2/23/2005
From: Cotuit, MA, USA
Status: offline 		Sweet. I think I will have to get one. will be a good winter project once I finish buying everything I need to build the other unfinished planes. Just bought another whiplash and also have a DD still in the box. Would love to maybe find a used Jett 25 or 30 for the LR-1. Looks like a good quality plane for the money! Hats off to Wild Hare!

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RE: wild hare, LR-1 pylon racer - 10/10/2005 3:13:16 PM   
bob27s



Posts: 4819
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		There are a few of these out there flying with the Jett .30 and .35 engines. Folks tell me they are pleased with them.

Of note, do not use the standard blade APC props. I recommend the smaller size APC D-1 pylon props if you are using the BSE-35 on this. The 8.5x7 or 8.5x7.25 are perfect.


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Jett Engineering - Engine Mfg Support Forum Host

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RE: wild hare, LR-1 pylon racer - 10/10/2005 10:24:02 PM   
Airbike


 

Posts: 600
Joined: 3/18/2003
From: Walnut, CA, USA
Status: offline 		Bob,

I can also recommend NOT using the standard APC props. The blade that was thrown was an APC 8x8 cut down to 7x8. Even unworked props showed flex marks after just a few flights and the failed prop only had about 4 flights on it. I had some APC pylon props but the engine (OS .37SZH) didn't have enough thread length for the thick hub.

You don't know how many times I've been on the Jett web site drooling over which engine to stick in this plane. I keep thinking that the BSE 35 is a great balance for power and weight but then if I want to sell the engine, I think more people would prefer a Jett 40 or even a 50.

I've flown my electric version at around 4 pounds so the weight of the Jett 50 should not be too bad. I'm sure it would still have an AUW under 4 lbs.

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RE: wild hare, LR-1 pylon racer - 10/11/2005 1:49:07 AM   
rmenke


 

Posts: 1773
Joined: 6/25/2004
From: Merced, Ca., CA, USA
Status: offline 		Would you quit playing around and get the BSE 35 for the LR-1! Anything more will be way above what the plane wants in weight. Yea, the 50 is a great engine, but the 35 just rules, period. Forget the selling stuff, once you run and fly the 35, they will have to pry it out of your cold dead hands. If you don't love it, send me a pm. Imagine a twin quickee!

(in reply to Airbike)
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RE: wild hare, LR-1 pylon racer - 10/11/2005 4:50:49 PM   
Airbike


 

Posts: 600
Joined: 3/18/2003
From: Walnut, CA, USA
Status: offline 		Hah!!

After my post last night, I went to the Jett web site and ordered the Sport Jett 50. It's less than 4 oz more than the OS37SZH with Macs muffler.

My electric version was carrying over 20 oz of batteries and flew just fine (needed more power, 1000 watts was ok, needs 1500 watts).

How about a quickee twin using supertiger X40's???? It might only get one flight, but man that'll be some flight

I'll post how the LR-1 does with the SJ50 after I get the engine broken in and installed.

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RE: wild hare, LR-1 pylon racer - 10/11/2005 8:26:41 PM   
rmenke


 

Posts: 1773
Joined: 6/25/2004
From: Merced, Ca., CA, USA
Status: offline 		OK, so you ordered a 50! Just had to go for the cubic inches? Now I am thinking twin 50's on a 60" Q-500! Sorry, forced to ride your behind through this project. I question if you will be able to mount the 50. If so, reinforce the mount back to wing LE. Plan on finding a Nimah small battery that will go in the back of the fuse to offset the frontal weight. Got to keep as much weight off as possible. S.R. batteries have some great small packs with 6-800 mah that will work well. Need to know what city and state you are located. If possible, would like to be there for the first flight! I expect you to get off the ground with no problem. I expect it to go like crazy and hit speeds in the 160-170 mph range, may even pull the wing off in a dive! Do you have pylons at your field? If so, will bring my little BSE 35 and race you for pinks! Yea, you will be faster, not a bunch faster, but then you gotta turn and keep the thing in control. Gonna get you bad there ( I think). Do you choke when the stakes are a little high? Ok, now what goes up, must come down. If you are perfect and keep your speed up, you should be able to get down, but going to be darn hot, guarantted! If the airframe survives the first landing, will trade you a composite Q-500 in good shape for the LR-1. Frankly, and honestly, hope all will be well and no problems, but am not kidding about pinks or trade! A hard lesson learned this past few years is to listen well to Dub Jett and Bob B when they suggest anything. You can take it to the bank. Will grant you that Bob's flying is nothing special, but he calls well, makes cute little girls well, and simply knows his stuff when it comes to engines and planes. After all, they live this stuff daily, you and I wish. (at leat me) Good wishes for you!

(in reply to Airbike)
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RE: wild hare, LR-1 pylon racer - 10/11/2005 9:22:06 PM   
bob27s



Posts: 4819
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		a tiny bit off topic here..... I think it was 1996 NATS, Lyle Larson brought a P-82 looking bird to show off. Built from two of his Strega fuselages, extra wing mid section - and a pair of Nelson Q-40 engines on it Im not sure if it ever flew - but as kewl as just the thought of it it was, it didnt even have to.


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Jett Engineering - Engine Mfg Support Forum Host

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RE: wild hare, LR-1 pylon racer - 10/11/2005 10:00:59 PM   
MJD


 

Posts: 1682
Joined: 5/27/2003
From: Orangeville, ON, CANADA
Status: offline 		On and off topic here myself, but two of you have mentioned rpm limits already so..

The APC guidelines for their sport props are 190k/dia in inches, so 10" - 19K 9" - 21.1k 8" - 23.75K.

But Bob I know you sound nervous talking about their 8" sport props on Jett .50's, and the comment above about a clipped 8" coming apart are disconcerting as well. So how much do I worry? After break-in on a 9-6 I am planning to try out various 8" props on my.50V1 as recommended in the instructions and by Magnum fliers. It sounds like on most of these .50 size XS aircraft we are running right at the recommended limits or slightly below. How many sport props are coming apart at these limits? On my Jett .50 I will use pylon props as recommended after break in, I have some on order. But most of those sound like a bit too much load for the 50.V1 setup, as it seems to be set up for somewhere between Q500 and I guess QM40 in terms of load and rpm. I guess clipping the pylon props would be the smartest way to go, no?

Thx

MJD

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RE: wild hare, LR-1 pylon racer - 10/11/2005 11:05:52 PM   
Airbike


 

Posts: 600
Joined: 3/18/2003
From: Walnut, CA, USA
Status: offline 		OK, I had a talk with Dub this morning regarding my application for the Sport Jett 50. I will be using the shorter black race muffler as I don't intend to be running anything near a 10x6 prop for this airframe.


He recommended that after break-in, to try the 8.75 diameter series of apc pylon props and cut the dia down as needed to prop for around 19000 to 20500 on the ground.

rmenke, if you are in CT, we'll have a hard time getting together. I'm in Los Angeles area. and Race?? I have absolutely 0, zilch, zero, nada, racing experience.. Just a pretend racer who stands on the runway when no one is there and flies some laps for fun.

They are actually having a Q500 and Q40 race this weekend at my local field. I think I'll bring my electric F5D and see if I can fly some laps around the pylons after their practice on Friday afternoon. OK, so the electric sounds different, but the prop spins over 40k

I can't remember when this stupid speed bug bit me.. its only been a few months I think. The learning curve is steep and I hope that mine does not stay a straight line

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RE: wild hare, LR-1 pylon racer - 10/12/2005 1:43:56 PM   
bob27s



Posts: 4819
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		MJD,

You can run 8" dia props - but they do not have to be stock 8" props. My recommendation - get the D-1 racing props, and clip them down until you find the RPM you are looking for. For the V1 Id recommend starting with a 8.8x8.5 and clipping it to about 8.25" diameter to start with.

For a stock out of the bag prop, the APC 8.5"x7.25 is pretty small - good blade design - pulls nicely - and as a stock blade the Jett .40SS (sport pylon engine) turns these at 20K rpm on the ground. (we use to use these for break-in props - until we found they worked well on the sport engines for racing - 428 rules require 8.75" dia min - so they can not be used there)

Alternately, use one of the 7.4x8 APC carbon Q-40 props. Those actually run well on the 50V1 with the pipe cut down, but they are a tiny bit too small to get a decent launch out of the Magnum. On something like this LR-1 they might work ok.

Other alternate - Zinger pylon props - dont laugh - they have some 8.75x7.5 props that are pretty good. (we used these for Q-40 prop blanks for quite a while)

As Airbike noted - Dub will recommend the same thing. RPM is important with a good tuned exhaust system, when trying to balance it for a speed aircraft.

Also - Airbike...... make sure to use a bubble-jett or tetra fuel tank in that thing. Its going to foam fuel like you have never seen with a regular fuel tank with that engine.

< Message edited by bob27s -- 10/12/2005 2:04:13 PM >


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Bob Brassell
Jett Engineering - Engine Mfg Support Forum Host

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RE: wild hare, LR-1 pylon racer - 10/12/2005 8:25:45 PM